Maritime Dictionary
The Maritime Dictionary presented below has been compiled from various sources and is being updated at regular intervals.
Please do not hesitate to contact us for any queries or ideas for improvement of the maritime dictionary.
The best way to find the definition of the term you are searching for is by pressing CTRL+F in your web browser to pop up the search bar and type the term you want to find.
2
2H
Second Half
A
A/S
Alongside
AA
Always Afloat
AAAA
Always Accessible Always Afloat
AARA
Amsterdam-Antwerp-Rotterdam Area
Abaft
A relative term used to describe the location of one object in relation to another, in which the object described is farther aft than the other. Thus, the mainmast is abaft the foremast (in back of).
Abaft the beam
Said of the bearing of an object which bears between the beam and the stern (further back than the ship’s middle).
Abandon ship
Get away from the ship, as in an emergency.
Abeam
The bearing of an object 90 degrees from ahead (in a line with the middle of the ship).
Able bodied seaman
The next grade above the beginning grade of ordinary seaman in the deck crew.
Aboard
In the vessel (on the ship).
Aboveboard
Above decks; without concealment of deceit (out in the open).
Abreast
Abeam of (alongside of).
Abrid
A bushing plate around a hole in which a pintle works.
ABT
About
Access Holes
Holes cut in ship’s structure to permit entering or leaving various compartments.
Accommodation ladder
The portable steps from the gangway down to the waterline.
Aces
Hooks for the chains.
Acorn
A solid piece of metal shaped like an acorn, and used to finish off the top of an upright in a railing contructed of pipe.
ADCOM
Address Commission
Added mass
The effective increase in mass of a hull, due to the entrained water, when in motion.
Added weight method
One method used in the calculation of a ship’s damaged stability when it is partially fl ooded. It regards the water which has entered as an added weight, the basic hull envelope remaining. The other approach uses the concept of lost buoyancy.
Admiral
Comes from the Arabic “Emir” or “Amir” which means “First commander” and “Al-bahr which means “the sea”. Emir-al-barh evolved into Admiral.
Adrift
Loose from the moorings (not tied or secured).
AFFF
Aqueous Film Forming Foam
AFFREIGHTMENT
The hiring of a ship in whole or part
Afloat
Floating.
Aframax
A term used for the largest dry bulkcarriers.
AFSPS
Arrival First Sea Pilot Station (Norway)
Aft
At, or towards the stern of a vessel. (Opposite to forward.)
Aft peak tank
A tank or compartment located abaft the aftmost watertight transverse bulkhead above propeller(s) and rudder (often used for fresh water or sea water ballast).
After body
The section aft of amidships.
After deck
A term applied to a deck aft to the midship portion of a vessel.
After frammes
Radiating cant frames fastened to transom plates.
After peak
A compartment just forward of the stern post. It is generally almost entirely below the load water line.
After peak bulkhead
A term applied to the first transverse bulkhead forward of the stern post. This bulkhead forms the forward boundary of the after-peak tank and should be made watertight.
After perpendicular
The vertical line through the intersection of the load water line and the after edge of the stern post. On submarines or ships having a similar stern, it is a vertical line passing through the points where the design waterline intersects the stern of the ship>
After rake
That part of the stern which overhangs the keel.
Aftermost
Nearest the stern.
Aground
Resting on the bottom.
AGW
All Going Well
AHL
Australian Hold Ladders
Ahoy
A call used in hailing a vessel or boat (hey!).
AIO
Admiralty Information Overlay
Air casing
A ring-shaped plate coaming surrounding the stack and fitted at the upper deck, just below the umbrella. It protects the deck structure from heat and helps ventilate the fireroom.
Air draught
The vertical distance from the summer waterline to the highest point in the ship, usually the top of a mast.
Air Hammer
Hammer driven by compressed air for riveting, or chipping. Sometimes called an air gun or “gun”.
Air port
An opening in the side of a ship or a deck house, usually round in shape and fitted with a hinged frame in which a thick glass light is secured. The purpose of the air port is to provide light and ventilation to and vision from the interior.
Air tank
A metal air-tight tank built into a boat to insure flotation even when the boat is swamped.
Air-tight door
A door so constructed that, when closed, air cannot pass through. They are fitted in air locks.
ALARP
As Low As Reasonable Practicable
Alee
To the leeward side (away from the wind).
Alive
Alert (pep it up!).
All hands
The entire crew.
All standing
To bring to a sudden stop.
All Stations General Call
Used by radio operator to establish communication with any station within range or in a certain area to alert all radio stations that a message is to follow:ALL STATIONS, ALL STATIONS, ALL STATIONS THIS IS NOVA, NOVA, NOVA
Alleyway
A vessel’s internal passageway or corridor.
Aloft
Above the upper deck (above).
Alongside
The position of a vessel when securely moored on a berth in port.
Altar
A step in a graving dock.
Amidship(s)
In the longitudinal, or fore-and-aft center of a ship. Halfway between stem and stern. The term is used to convey the idea of general locality but not that of definite extent.
Amidships
(1) Midway (midpoint) between port and starboard sides of a vessel. (2) The midway point between the forward and aft perpendiculars.
AMSA
Australian Maritime Safety Authority
AMVER
Automated Mutual-Assistance Vessel Rescue System
Anchor
A heavy steel device (of variable design) so shaped as to grip the sea bed to hold a vessel or offshore installation in a desired position.
Anchor bar
Wooden bar with an iron shod, wedge shaped end, used in prying the anchor or working the anchor or working the anchor chain. Also used to engage or disengage the wild-cat.
Anchor billboard
A structure on the deck of a vessel upon which the anchor is mounted when not in use.
Anchor cable
Chain or wire connecting a vessel to its anchor(s).
Anchor chain
Heavy, linked chain secured to an anchor for mooring or anchoring.
Anchor lights
The riding lights required to be carried by vessels at anchor.
Anchor stopper
A device to hold an anchor cable so as to prevent the anchor from running out or to relieve the strain at the inboard end.
Anchor watch
The detail on deck at night, when at anchor, to safeguard the vessel (not necessarily at the anchor; a general watch).
Anchor’s aweigh
Said of the anchor when just clear of the bottom (leaving or moving).
Anchorage
A place suitable for anchoring.
Angle
Same as angle bar
Angle bar
A bar of angle-shaped section used as a stiffener and on riveted ships ties floors to the shell.
Angle clip
A short piece of angle bar.
Angle collar
Angle bent to fit a pipe, column, tank or stack, intersecting or projecting through a bulkhead or deck for the purposes of making a watertight or oiltight joint.
Anneal
To heat a metal and to cool it in such a fashion as to toughen and soften it. Brass or copper is annealed by heating to a cherry red and dipping suddenly into water while hot. Iron or steel is slowly cooled from the heated condition to anneal.
Anode
Zinc or aluminium or some such alloy that is fixed to the hull of a vessel. They are “eaten” up by electrical currents moving from the vessel to the water. The anode is sacrificed to protect the metal hull of the vessel – without the anode, the hull plating would be disolved by electrolysis.
ANTHAM
Antwerp-Hamburg Range
Antifouling (paint)
A marine paint composition containing toxic ingredients preventing or retarding marine underwater growth on the hull of a vessel.
Aperture
The space provided between propeller and stern post for the propeller.
APHIS
Animal & Plant Health Inspection Service
API
American Petroeum Institute
Appendage(s)
Objects protruding from the underwater section of a hull; e.g., bilge keels, rudders, stabilising fins, shaft brackets, etc.
Appendages
Relatively small portions of a vessel projecting beyond its main outline, as shown by cross-sections and water-sections. The word applies to the following parts of the stern and stern post: the keel below its shell line, the rolling keel or fin, the rudder, rudder post, screw, bilge keel, struts, bossing and skeg.
APPS
Act to Prevent Pollution from Ships
Apron plate
A plate fitted in the continuation of the shell plating above the forecastle sheer strake at the stem. These plates are sometimes fitted one in each side of the stem, and serve as foundation for the bow mooring pipes.
APS
Arrival Pilot Station
APTF
Asia Pacific Terminal Forum
ARAG
Amsterdam-Rotterdam–Antwerp-Ghent Range
Arbor
The principal axis member or spindle of a machine by which a motion of revolution is transmitted.
Arch piece
The curved portion of the stern frame over the screw aperture, joining the propeller post and stern post.
ARPA
Automatic Radar Plotting Aid
Ashore
On the shore (on land).
ASI
Annual Safety Inspection
Assemble
To fit together small parts, in making a large section, or part.
Astern
The backward direction in the line of a vessel’s centreline.
ATDNSHINC
Any Time Day or Night Sundays and Holidays Included
Athwart
Same as a beam
Athwartship
Transverse or across a vessel from side to side.
Athwartships
Across the ship, at right angles to the centreline.
ATUTC
Actual Times Used to Count
Automatic Identification System (AIS)
The automatic identification system (AIS) is an automatic tracking system that integrates a standardized VHF transceiver with a positioning system such as a Global Positioning System receiver, with other electronic navigation sensors, such as a gyrocompass or rate of turn indicator on vessels. AIS designed to provide vessels unique identification, position, course, and speed to other vessels and to coastal authorities automatically. Received data can be displayed on a screen or an electronic chart display and information system.
Vessels fitted with AIS transceivers can be tracked by AIS base stations located along coast lines or, when out of range of terrestrial networks, through a number of satellites that are fitted with special AIS receivers which are capable of deconflicting a large number of signatures.
AIS information supplements marine radar, which continues to be the primary method of collision avoidance for water transport.
Auxiliaries
Various winches, pumps motors, engines, etc., required on a ship, as distinguished from main propulsive machinery (boilers and engines on a steam installation).
Auxiliary foundations
Foundations for condensers, distillers, evaporator pumps or any of the auxiliary machinery in the engine or boiler rooms.
Auxiliary machinery
Machinery other than the ship’s main engines.
Avast
An order to stop or cease hauling (stop action at once).
Awash
Level with the water (water ready to, or slightly covering decks).
Awning
A canvas canopy secured over the ship’s deck as a protection from the weather (covering).
Aye, aye, sir
The reply to an officer’s order signifying that he is understood and will be obeyed (I understand).
B
Back bar
Used on the opposite side of a bosom bar.
Backhaul
To haul a shipment back over part of a route that it has already traveled; return movement of cargo, usually opposite from the direction of its primary cargo destination.
BAF
Bunker Adjustment Factor. A Fuel Surcharge expressed as a percentage added or subtracted from the freight amount reflecting the movement in the market place price for bunkers.
Bail
To throw water out of a boat; a yoke, as a ladder bail (rung).
Balanced frames
The midship frames that are of equal shap and square flanged. There are thirty or more on a cargo vessel, equally divided between starboard and port sides.
Balanced rudder
A rudder with its axis halfway between the forward and after edge.
Bale capacity
Capacity in hold to edge of frames and stiffeners; refl ects the stowage of bales or boxes.
Balk
(In cerpentry) a piece of timber from 4” to 10” square.
Ballast
Any weight carried solely for the purpose of making the vessel more seaworthy. Ballast may be either portable or fixed, depending upn the condition of the ship. Fixed or permanent ballast in the form of sand, concrete, scrap or pig iron is usually fitted to overcome an inherent defect in stability or trim due to faulty design or changed character of service. Potrable ballast, usually in the form of water pumped into or out of the bottom, peak, or wing ballast tanks, is utilized to overcome a temporary defect in stability or trim due to faulty loading, damage, etc.
Ballast keel
A heavy keel fitted to vessels to lower the center of gravity and improve stability.
Ballast tanks
Double bottoms for carrying water ballast and capable of being flooded or pumped out at will.
Band
A group of radio frequencies designated to a particular radio service.
Barbette
Cylindrical structure built up to armor plates extending from the protected deck of a war vessel to the lower side of the turret shelf plate. They form protective enclosures in which are located the turret stools, shell stowage flats and ammunition hoisting gear for the turrets.
BAREBOAT CHTR
Bareboat Charter Owners lease a specific ship and control its technical management and commercial operations only.
Barge
A craft of full body and heavy construction designed gor the carriage of cargo but having no machinery for self-propulsion.
Barnacle
Small marine growth which attaches itself to a vessel’s hull in large numbers, often greatly retarding her speed.
Base line
A horizontal fore and aft reference line for vertical measurements. This line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measurements. This is line is perpendicular to the vertical center line. A horizontal transverse reference line for vertical measuremnts. This line is perpendicular to both the vertical center line and fore-and-aft base line.
Batten
A narrow strip of wood for fairing in lines. Also a stripof wood to fasten objects together. A strip of paulins in place. (Verb) To secure by means of battens, as to “batten down a hatch”.
Batten down
To make watertight. Said of hatches and cargo (tie up or secure).
Battens, cargo
A tern applied to the planks that are fitted to the inside of the frames in a hold to keep the cargo away from the shell plating, the strips of wood or steel used to prevent shifting of cargo.
BBB
Before Breaking Bulk
BDI
Both Dates Inclusive
BDN
Bunker Delivery Note
Beachcomber
A derelict seaman found unemployed on the waterfront, especially in a foreign country (seaman without a ship).
Beam
(1) The registered breadth of a vessel, measured at the outside of the hull amidships, or at its greatest breadth. (2) A transverse structural member supporting a deck and/or strengthening a hull.
Beam knees
Angular fittings which connect beams and frames together.
Beam line
The line showing the top of the frame line.
Beam plate angles
A beam made from a flat plate, with the flange bent at right angles by an angle-bending machine.
Beam wind
A wind at right angles to a vessel’s course (wind blowing at the ship’s side.)
Bear a hand
To assist or help.
Bear down
To approach (overtake or come up to).
Bearer
A term applied to foundations, particularly those having vertical web plates themselves are called bearers.
Bearing
The direction of an object (with reference to you, your ship, another object).
Becalmed
A sailing vessel dead in the water due to lack of wind (not moving).
Becket
A rope eye for the hook of a block. A rope grommet used in place of a rowlock. Also, a small piece of rope with an eye in each end to hold the feet of a sprit to the mast. In general any small rope or strap used as a handle.
Bed plate
A structure fitted for support of the feet of the engine columns, as well as to provide support for crankshaft bearings. It also helps distribute engine weight and stresses to the ship’s structure. The bed plate consists of a series of transverse girders, connecting fore-and-aft members or girders.
BEI
Biological Exposure Indices
Belay
To make fast as to a pin or cleat. To rescind an order (tie up).
Belaying pin
A wooden or iron pin fitting into a rail upon which to secure ropes.
Bell suction
The flared open end of a cargo pipeline which is situated at close tolerances to the bottom of a liquid cargo tank.
Bells
see Ships Time
Belly strap
A rope passed around (center) a boat or other object for hanging.
Below
Undernearth the surface of the water. Undernearth a deck or decks
Bend
The twisting or turning of a rope so as to fasten it to some object, as a spar or ring.
Bending rolls
Large machine used to give curvature to plates by passage in contact with three rolls.
Bending slab
Heavy cast-iron blocks with square or round holes for “dogging down” arranged to form a large solid floor on which frames and structural members are bent and formed.
BENDS
Both Ends (Load & Discharge Ports)
BEP
Best Environmental Practice
Berth
A place for a ship. The distance from frame line to frame line. A term applied to a bed or a place to sleep. Berths, as a rule, are permanently built into the structure of the staterooms or conpartments. They are constructed singly and also in tiers of two or three, one above the other. When single, drawers for stowing clothing are often built in underneath. Tiers of berths constructed of pipe are commonly installed in the crew space.
Berth term
Shipped under a rate that does not include the cost of loading or unloading.
Between decks
The space between any two, not necessarily adjacent, decks. Frequently expressed as “Tween Decks”.
Bevel
Any angle other than 90o which one surface makes with another. Also to bevel a beam, flange, or plate for vee welding, to tilt a girder to make the sheer bevel.
Bevel square
A device that can be used to make a close bevel, less than 90o, or an open bevel, more than 90o.
BI
Both Inclusive
Bight
Formed by bringing the end of a rope around, near to, or across its own part.
Bilge
(1) Intersection or curved transition of bottom and sides of a hull. (2) Lowest points within hull compartments where liquids may accumulate.
Bilge blocks
Supporting blocks used under bilge for support during construction or drydocking.
Bilge bracket
Vertical transverse plate located beneath side frames in the area of the bilge and between inner and outer bottoms.
Bilge keel
Non-retractable elongated longitudinal fin protruding from the bilge used to reduce rolling.
Bilge plates
The curved shell plates that fit the bilge.
Bilge pump
Pump for removing bilge water.
Bilge strake
Line of shell plating at the bilge between bottom and side plating.
Bilge well
A bilge well is generally located in the lowest part of the compartment. It is used for drainage and is generally shaped like a box, and fitted to the underside of the inner bottom, with a strainer on top.
Bilges
The lowest portion of a ship inside the hull, considering the inner bottom where fitted as the bottom hull limit.
Bilgeway
Same a bilge
Bill of lading
A document that establishes the terms of contract between a shipper and a trasportation company. It serves as a document title, a contract of carriage, and a receipt for goods.
BIMCO
Baltic & International Maritime Council
Bin
A walled enclosure built on the deck of a barge for the purpose of retaining cargo; also called a pen or cargo box.
Binnacle
A stand or case for housing a compass so that it may be conveniently consulted. Binnacles differ in shape and size according to where used and the size of the compass to be accpmmodated. A binnacle for a ship’s navigating compass consists essentially for a pedestal at whose upper and is a bowl-shaped receptacle having a sliding hood-like cover. This receptacle accommodates the gimbals supporting the compass. Compensating binnacles are provided with brackets or arms on either side, starboard and port, for supporting and securing the iron cylinders or spheres used to counteract the quadrantal error due to the earth’s magnetization of the vessel. This type of binnacle is usually placed immediately in front of the steering wheel, having its vertical axis in the vertical plane of the fore-and-aft center-line of the vessel.
Birth marks
Same as Plimsoll marks.
Bitter end
(Nautical). The inboard end of a vessel’s anchor chain which is made fast in the chain locker
Bitts
Twin stout posts welded to the deck to which mooring lines are fastened.
Bitumastic
A black, tar-like composition largely of bitumen or asphalt and containing such other ingredients as rosin, Portland cement, slaked lime, petroleum, etc. It is used as a protective coating in ballast and trimming tanks, chain lockers, shaft alleys, etc.
BL (1)
Bale
BL (2)
(Bill of Lading) A document signed by the carrier which acts as a receipt and evidence of title to the cargo.
Black gang
Member of the engine-room force, which included the engineers, firemen, oilers, and wipers.
Blank flange
A flange which is not drilled but which is otherwise complete.
Bleeders
A term applied to plugs screwed into the bottom of a ship to provide for drainage of the compartments when the vessel is in dry dock.
BLG
Bulk Liquids and Gases
Block
The name given a pulley or sheave, or system of pulleys or sheaves mounted in a frame, and used to multiply power when moving objects by means of ropes run over the sheaves. Single, double or triple-when used with the word “block” indicate the number of sheaves it contains.
Block and block
Same as two blocks.
Block and tackle
(Block and Falls). The complete unit of two or more blocks rove up with an adequate amount of rope.
BM
Beam
BMP
Best Management Practices
BNWAS
Bridge Navigational Watch Alarm System
Boat-fall
A purchase (block and tackle) for hoisting a boat to its davits.
BOB
Bunker on Board
Body plan
A pair of half transverse and elevations, with a common vertical center line. The right side gives the ship as seen from ahead, the left side from astern. Water lines, buttock and bow lines, diagonal lines, etc., are shown.
BOEMRE
Bureau of Ocean Energy Management, Regulation and Enforcement
BOFFER
Best Offer
Boiler
Any vessel, container or receptacle that is capable of generating steam by the internal or external application of heat. There are two general classes of boilers. I.E., fire-tube and water-tube.
Boiler casing
A wall protecting the different deck spaces from the heat of the boiler room.
Boiler chocks
Stay braces which prevent fore and aft movement of boilers.
Boiler foundation
The structure upon which the boiler is secured. It generally consists of girders built up from plates and shapes. In a cylindrical boiler the athwartship girders are often called saddles.
Boiler room
A compartment in the middle or after section of a vessel where the boilers are placed.
Bollard
The equivalent of a vessel’s mooring bitts used onshore.
Bollard pull
The static pulling force of a tugboat measured in pounds.
Bolster plate
A piece of plate adjoining the hawse hole, to prevent the chafing of the ship’s bow. A plate foe support like a pillow or cushion.
Bond port
Port of a vessel’s initial customs entry to any country; also known as first port of call.
Bonded warehouse
A warehouse authorized by customs authorities for storage of goods on which payment of duties is deferred until the goods are removed.
Booby hatch
The cover of a scuttle-way or small hatchway, such as that which leads to the forecastle or fore peak of a vessel.
Boom
A term applied to a spar used in handling cargo, or as the lower piece of a fore-and-aft sail.
Boom cradle
A rest for a cargo-boom when lowered for securing for sea.
Boom rest
A support for a boom when the boom is not in use.
Boom step
A socket for end of boom.
Boom table
An outrigger attached to the mast, or a structure built up around a mast from the deck, to support the heel bearings for booms. Boom tables are necessary to provide working clearances when a number of booms are installd on one mast.
Boot-topping
Durable paint coating applied to a hull between the light and loaded waterlines.
Bort flange
A protruding flange above a port to keep drip from entering.
Bos’n
Shortening of the old term “boatswain,” an unlicensed member of the crew who supervises the work of the deck men under direction of the first mate.
Bos’n’s chair
The piece of board on which a man working aloft is swung.
Bos’n’s chestb
The deck chest in which the bos’n keeps his deck gear.
Bos’n’s lockerb
The locker in which the bos’n keeps his deck gear.
Bosom
The inside of an angle bar.
Bosom barb
One angle fitted inside another.
Bosom plate
A plate bar or angle fitted to an angle bar to connect the ends of two angles.
Boss
The part of the propeller to which blades are attached. Also the aparture in the stern frame where propeller shaft enters.
Boss frame
A frame bent around to fit the bose in way of the stern tube or shaft.
Boss plate
The plate fitted around the boss of a propeller post or around the curved frames in way of stern tubes.
Bossingb
Hydrodynamically faired outboard portion of hull plating surrounding and supporting propeller shafting. In a single-screw vessel the bossing is integral to a centreline skeg.
Bottom plating
That part of the shell plating which is below the water line.
Bottom, outer
A term applied to the bottom shell plating in a double bottom ship.
Bounding angle
A steel angle used for reinforcement at the junction of two steel plates.
Bounding bar
A bar connecting the edges of a bulkhead to tank top, shell, decks, or another bulkhead.
Bow
The fore end or a ship.
Bow door
Watertight hinged door in the fore end of a Ro-Ro vessel through which vehicles and cargo may be loaded or discharged
Bow linesb
Curves representing a vertical section of the bow end of a ship. Similar curves in aft part of hull are buttock lines.
Bow rudderb
A rudder placed at the bottom of the forward stem and maneuvered from the fore peak.
Bow thruster
A propulsor installed near the bow to provide a transverse thrust component enhancing manoeuvrability.
Bowsprit
A spar extending forward from the stem.
Boxed end
The end of a barge which is squared for the full depth and width of the hull.
Boxing the compass
Calling names of the points of the compass in order.
BPG
Bridge Procedures Guide
BPQ
Barge Particulars Questionnaire
Bracket
A steel plate, commonly with a reinforcing flange, used to stiffen or tie beam angles to bulkheads frames to longitudinals, etc.
Braze
To heat and join by means of hard solder (spelter). This may be brass, bronze, or other alloys.
Breadth
The side-to-side measurements of a vessel at any given place.
Breadth extreme
The maximum breadth measured over plating or planking, including heading or enders.
Breadth, molded
See Molded Breadth.
Breadth, registered
Measured amidships at its greatest breadth to outside of plating.
Break
Of poop or forecastle. The point at which the partial poop or forcastle deck are discontinued.
Break ground
Said of anchor when it lifts clear of the bottom.
Breakbulk
Loose, noncontainerized cargo stowed directly into a ship’s hold.
Breaker
A small cask for fresh water carried in ship’s boats. A sea (wave) with a curl on the crest.
Breakwater
A term applied to plates fitted on a forward weather deck to form a V-shaped shield against water that is shipped over the bow.
Breaming
Cleaning the barnacles, paint, etc., from a ship’s bottom with a blow torch.
Breast beam
The transverse beam nearest to midship on the poop and forecastle deck.
Breast hook
Ahorizontal plate secured across the fore peak of a vessel to tie the fore-peak frames together and unit the bow.
Breast rail
The upper rail of a balcony on the quarter deck.
Breasthook
Horizontal plate brackets of generally triangular form connecting port and starboard side stringers and bow plating at the stem.
Bridge
Elevated centre dedicated to the control and navigation of the vessel. [Alt. Navigating bridge or wheelhouse.]
Bridge house
The erection or superstructure fitted about amidship on the upper deck of a ship. The officer’s quarters, staterooms and accommodations are usually in the bridge house.
Bridge wing(s)
Lateral (open or enclosed) extension(s) to a vessel’s bridge to permit direct vision beyond the hull side.
Bridge, navigating or flying
The uppermost platform erected at the level of the top of the pilot house. It generally consists of a narrow walkway supported by stan-chions, running from one side of the ship to the other and the space over the top of the pilot house. A duplicate set of navigating instruments and controls for the steering gear and engine room signals are installed on the flying bridge so that the ship may be navigated in good weather from this platform. Awnings erected on stanchions and weather cloths fitted to the railing give protection against sun and wind.
Bridges
A high transverse platform, often forming the top of a bridge house, extending from side to side of the ship, and from whick a good view of the weather deck may be had. An enclosed space called the pilot house is erected on the bridge in which are installed the navigating instruments, such as the compass and binnacle, the control for the steering apparatus, and the signals to the engine room. While the pilot house is generally entended to include a chartroom and sometimes staterooms, a clear passageway should be left around it. As the operation of the ship is directed from the bridge or flying bridge above it, there should also be clear, open passage from one side of the vessel to the other.
Bridle
A V-shaped chain, wire, or rope attached to a vessel being towed to which the towline is connected.
Bright work
Brass work, polished (also varnished wood work in yachts).
Broadband Radar
Radar using a continuous low power transmission rather than the high power pulsed transmission of conventional radar.
BROBb
Bunkers Remaining on Board
Broker
A person who arranges for transportation of loads for a percentage of the revenue from the load.
Brow
A small curved angle or flanged plate fitted on the outside of the shell of a ship over an air port to prevent water running down the ship’s side from entering the open port. Also called a watershed.
BSG
Barge Safety Guide
BSS
Basis
BSS 1/1
Basis 1 Port to 1 Port
BT
Berth Terms
Buck frame
A transverse truss.
Buckle plateb
A plate that has warped from its original shape also a plate that is wider at the center than at the end.
Budy
A term applied to a floating object that is moored or anchored so that it remains at one place. Budys are used for marking the places on the water where a ship is sunk, where reefs are below, where the edges of the channel are, or to provide means for mooring ship at a desired position.
Budyancy
Ability to float, the supporting effort exerted by a liquid (usaually water) upon the surface of a boly wholly or partially immersed.
Building slip
An inclined launching berth where the ship is built.
Build-operate-transfer (BOT)
A form of concession where a private party or consortium agrees to finance, construct, operate and maintain a facility for a specific period and transfer the facility to the concerned government or port authority after the term of the concession. The ownership of the concession area (port land) remains with the government or port authority during the entire concession period. the concessionaire bears the commercial risk of operating the facility.
Bulb angle
Or bulb angle bar. An angle with one edge having a bulb or swell.
Bulb plate
A narrow plate generally of mild steel, rolled with a bulb or swell along one of its edges. Used for hatch coamings, built up beams, etc.
Bulb tee
A Tee bar with toe of web reinforced.
Bulge
Same as bilge.
Bulk cargo
Cargo shipped in loose condition and of a homogeneous nature.
Bulk carrier
Vessel designed for the transportation of dry loose homogeneous cargoes in bulk in self-trimming holds and constructed to sustain the heavy concentrated weight distribution of the cargoes.
Bulkhead
(1) A vertical structural partition dividing a vessel’s interior into various compartments for strength and safety purposes; (termed strength bulkhead). (2) Term applied to vertical partition walls (non-structural) subdividing the interior of a vessel into compartments.
Bulkhead bounding: bar
A bar used for the purpose of connecting the edges of a bulkhead to the tank top, shell, deck, or to another bulkhead. Angle bars are generally used for this purpose, as both flanges are easily calked.
Bulkhead deck
Uppermost deck at which transverse watertight bulkheads terminate
Bulkhead sluice
An opening cut in a bulkhead just above the tank top connecting angle, and fitted with a valve which may be operated from the deck above.
Bulkhead stiffeners
A term applied to the beams or girders attached to a bulkhead for the purpose of supporting it under pressure and holding it in shape. Vertical stiffenera are most commonly used, but horizontal stiffeners or a combination of both may be used.
Bull riveting
Driving rivets by squeezing them with a high powered air or hydraulic machine.
Bullnosed bow
Bow with large rounded bow point underneath water line.
Bulwark
Barrier of stiffened plating at the outboard edge of the main or upper deck to prevent or inhibit entry of the sea. Bulwarks may be additionally employed at the forward edges of superstructure decks in lieu of safety railings as a barrier to wind and spray.
Bulwark stay
A brace extending from the deck to a point near the top of the bulwark, to keep it rigid.
BUNDLING
This is the assembly of pieces of cargo, secured into one manageable unit. This is a very flexible description; a rule of thumb is to present cargo at a size easily handled by a large (20 ton) fork lift truck.
Bunk
Built-in bed aboard ship.
Bunker
Compartment for the storage of oil or other fuel.
Bunker stays
A brace extending from the deck to a point near the top of the bulwark, to keep it rigid.
BUNKERS
Name given for vessels Fuel and Diesel Oil supplies (Originates from coal bunkers)
Buoy
A stationary floating object used as an aid for navigation.
Buoyancy
Ability to float, lifting power when immersed.
Burr edge
The rough uneven edge of a punched or burnt hole or plate.
Butt joint
A joint made by fitting two pieces squarely together on their edges, which is then welded or butt strapped.
Butt strap
A bar or plate used to fasten two or more objects together with their edges butted.
Butterworth
A washing process used to gas free or clean a cargo tank, employing hot water or chemicals, sprayed through a patented rotating nozzle.
Butterworth opening
a deck access opening with bolted cover, designed for butterworth operations.
Buttock
Counter. The rounded-in overhanging part on each side of the stern in front of the rudder, merging undernearth into the run.
Buttock lines
The curves shown by taking a vertical longitudinal section of the after part of a ship’s hull, parallel to the keel.
Button
A cast or fabricated deck item, usually round, that is used to thread cables between vessels when they are made-up.
BWAD
Brackish Water Arrival Draft
By the board
Overboard (over the side).
By the head
Deeper forward (front end deepest in water).
By the Run
To let go altogether.
C
CAA
Clean Air Act
Cabin
The captain’s quarters. The enclosed space of decked-over small boat.
Cable
A chain or line (rope) bent to the anchor.
Cable layer
Vessel designed for the laying and repair of seabed telecommunication cables.
Cable locker
Compartment located forward to store the anchor cable.
Cable-laid
The same as hawser-laid.
Cable-length
100 fathoms or 600 feet (6 feet to a fathom).
Cabotage
Shipments between ports of a single nation, frequently reserved to national flag vessels of that nation.
Calk
To tighten a lap or other seam with a chisel tool, either ny hand or meckanically.
Call
The method used to establish contact with one or more stations.
Call Sign
A call sign is a designated sequence of letters and numbers that are assigned when a vessel receives it’s Ship Radio Licence by their national licensing authorities. In Canada issued with the station licence by Innovation, Science and Economic Development Canada (IC). The vessel also receives it’s MMSI number, so that each vessel is uniquely identified. All radio transmissions must be individually identified by the call sign.
Calm
A wind or force less than one knot (knot 1 nautical mile per hour).
CALM
Catenary Anchor Leg Mooring
Cam
A projecting part of a wheel or other simple moving piece in machinery, so shaped as to give predetermined variable motion to another piece against which it acts, in repeating cycles.
CAM
Court Appointed Monitor
Camber
Transverse convex curvature of exposed decks to accelerate runoff.
Camel
(In engineering) a decked vessel having great stability designed for use in the lifting of sunken vessel or structures. A submersible float used for the same purpose by submerging, attaching, and pumping out.
Canadian Coast Guard (CCG)
The Canadian Coast Guard is a special operating agency within Fisheries and Oceans Canada. CCS work to ensure the safety of mariners in Canadian waters and protect Canada’s marine environment.
Canadian Coast Guard Auxiliary (CCGA)
Abbreviation for Canadian Coast Guard Auxiliary (except in B.C. where it is called RCM-SAR.)
Cant
The inclination of an object from the perpendicular. As a verb, to turn anything so that it does not stand square to a given object.
Cant beam
Any of the beams supporting the deck plating or planking in the overhanging part of the stern of a vessel. They radiate in fan shape from the transom beam to cant frames.
Cant body
That portion of a vessel’s boly either forward or aft in which the planes of the frames are not at right angles to the center line of the ship.
Cant frame
Hull side frame not aligned perpendicular to the vessel’s centreline.
Cant frames
The frame (generally bulb angles) at the end of a ship which are cented, that is, which rise obliquely from the keel.
Capesize
A term applied to large cargo vessels that cannot transit either the Panama or Suez Canals. They are usually of the order of 120 000–180 000 DWT.
Capsize
A ship is said to capsize when it loses transverse stability and rolls over and sinks.
Capstan
Steel warping drum rotating on a vertical axis for the handling of mooring lines and optionally anchor cable.
Capstan, steam
A vertical drum or barrel operated by a steam engine and used for handing heavy anchor chains, heavy hawsers, etc. The engine is usually non-reversing and transmites its power to the capstan shaft through a worm and worm sheel. The drum is fitted with pawls to prevent overhauling under the strain of the hawser or chain when the power is shut off. The engine may be disconnected and the capstan operated by hand through the medium of capstan bars.
Capstan-bar
A wooden bar which may be shipped in the capstan head for heaving around by hand (to heave up anchor or heavy objects by manpower).
Captain of the Head
A guy who gets Head (toilet) cleaning detail.
Car carrier
Vessel designed for the delivery transportation of road vehicles.
CARB
California Air Resources Board
Cardinal pointsb
The four principal points of the compass North, East, South and West.
Cargo
Merchandise or goods accepted for transportation by ship.
Cargo battens
Strips of wood used to keep cargo away from the steel hull.
Cargo boom
A heavy boom used in handling cargo.
Cargo door
Watertight door in the hull side through which cargo may be loaded or discharged.
Cargo hatch
Large opening in the dec to permit loading of cargo.
Cargo port
An opening, provided with a watertight cover or door, in the side of a vessels of two or more decks, through which the cargo is received and discharged.
Carlines (carlings)
A short beam running fore and aft between or under transverse deck beams. Also called headers when they support the ends of interrupted deck beams.
Carrier
Any person or entity who, in a contract of carriage, undertakes to perform or to procure the performance of carriage by sea, inland waterway, rail, road, air, or by a combination of such modes.
Cartage
Intraport or local hauling of cargo by drays or trucks (also refferd to as drayage).
Carvel built
A type of plating made flush be vee butt welding or butt strap riveting.
CAS
Condition Assessment Scheme
Case joint
A kind of plate joint by which an overlap can gradually be made flush. This is done with the aid of liners, and is used on the bow and stern to give the vessel a finer trim.
Casingb
The extra case or bulkhead built around the ship’s funnel to protect the decks from heat. See Air Casing.
Cast off
To let go.
Cathodic protection
Sacrificial or impressed current system of corrosion protection of hull, tanks and piping.
Caulk
To fill in the seams with cotton or oakum.
Caulker
One who caulks.
Cavitation
The formation of bubbles on an aerofoil section in areas of reduced pressure. Can occur on heavily loaded ship propellers.
CBA
Collective Bargaining Agreement
CBFT (or CFT)
Cubic Feet
CBM
Cubic Meter
CBP
Customs Border Protection
CCM
Corporate Compliance Manager
CCNR
Central Commission for Navigation on the Rhine
CCTV
Close Circuit Television
Ceilingb
The inside skin of a vessel between decks, or in a small vessel from the deck beams to bilge.
Cellular container ship
Container vessel having specially designed vertical cell guides for the accommodation of standard size containers thereby precluding movement and lashing.
Cellular double bottomb
A term applied where the double bottom is divided into numerous rectangular compartments by the floors and longitudinals.
Center line bulkhead
A fore-and-aft or longitudinal bulkhead erected on the center line or in the same plane as the keel. Also a reference line scrived on a transverse bulkhead to indicate the center of the ship.
Center lineb
A horizontal fore- and -aft reference line for athwartship measurements, dividing the ship into two symmetrical halves. A vertical reference line in the center of the body plan, midship section or other sections.
Centre of buoyancy (CB)
That point through which the buoyancy force acts. It is defi ned in space by its longitudinal, vertical and transverse (respectively, LCB, VCB and TCB) position relative to a set of orthogonal axes. It is also the centroid of volume of the displaced water.
Centre of flotation (CF)
The centroid of area of a waterplane. A small weight added, or removed, from the ship vertically in line with the CF will cause a change of draught without heel or trim. For a symmetrical ship the CF will be on the centerline and its position is given relative to amidships.
Centre of gravity (CG)
The point through which the force due to gravity, that is the weight of the body, acts. Its position is defi ned in a similar way to the centre of buoyancy and is very important in calculations of stability.
Centreline
The longitudinal vertical plane of a vessel.
Certificate
a document showing proof of the holder’s qualifications
CFG
China Focus Group
CFOb
Chief Financial Officer
CFR
Code of Federal Regulations
CFR (or C&F)
Cost and Freight
Chafe
To wear the surface of a rope by rubbing against a solid object.
Chafing gear
A guard of canvas or rope put around spars, mooring lines, or rigging to prevent them from wearing out by rubbing against something.
Chafing plate
A bent plate used in minimizing chafing of ropes, as at hatches.
Chain locker
The compartment for storing the anchor chains, located near the hawse pipes in the bow of the ship.
Chain locker manger
See Manager
Chain locker pipe
The iron-bound opening or section of pipe loading from the chain locker to the deck, through which the chain cable passes.
Chain riveting
Two or more rows of rivets spaces so that the rivets in one row are opposite those in adjacent row.
Chains
Anchor chains
Chamfer
A bevel surgace formed by cutting away the angle of two faces of a piece of wood or metal.
Channel
a radio frequency that has been designated for a particular purpose
Charley Noble
The galley smoke-pipe (cook’s stove pipe), named after The English sea captain who was noted for the scrupulous cleanliness and shine of the brass aboard his ship.
Chart house
Small room adjacent to the bridge for charts and navigating instruments.
Chart room
A small room adjacent to the Pilot House in which charts and navigating instruments are located.
Chassis
A frame with wheels and container locking devices to secure the container for movement.
Check
To ease off gradually (go slower and move carefully).
Check lines
Used in shaping plates, etc., to make sure that the template have not changed in size by shrinking or expending
Cheeks
The bilgeways, or curve of the bilges.
Chemical carrier (Tanker)
Vessel designed specifically for the transportation of volatile, poisonous or corrosive liquids in specially constructed tanks.
Chief
The crew’s term for the chief engineer.
Chief mate
Another term for first mate.
Chock
(In naval architecture) a small piece of wood used to make good any deficiency in a piece of tember, frame etc.
Chock boat
A cradle or support for a lifeboat.
Chock roller
A chock with a sheave to prevent chafing of ropes.
Chocks
Deck fittings for mooring line to pass through.
Choked
The falls foul in a block. The falls may be chocked or jammed intentionally for a temporary securing (holding).
CHOPT
Charterers Option
CHTRS
Charterers
CIC
Concentrated Inspection Campaign
CIF
Cost, Insurance & Freight. Seller pays all these costs to a nominated port or place of discharge.
Class A
a DSC radio specification standard that meets all IMO MF/VHF requirements for compulsorily fitted vessels over 300 GT
Class B
a DSC radio specification standard that meets IMO MF/VHF requirements for non-pleasure craft not required to have Class A equipment
Class C
a DSC radio specification standard that is no longer approved
Class D
a DSC radio specification standard that meets the minimum VHF-DSC requirements for non-pleasure craft not required to carry Class A or B equipment (Not all Class D radios meet IMO requirements.)
Class E
a DSC radio specification standard that has similar capabilities to Class D but is for MF/HF equipment
Class H
a DSC radio specification standard for VHF handheld radios which include GPS and DSC. It is intended to provide minimum facilities for VHF-DSC Distress, Urgency and Safety, as well as routine calling.
Class M
a class defined as a man-overboard device that will produce both a DSC Distress alert and an AIS Distress alert when activated
Classification societies
Organisations which set standards for design and construction of vessels and integral machinery amongst much else. Lloyd’s Register of Shipping, Bureau Veritas, Registro Italiano Navale, American Bureau of Shipping, Det Norske Veritas, Germanischer Lloyd, Nippon Kaiji Kyokai, Russian Maritime Register of Shipping, Hellenic Register of Shipping, Polish Register of Shipping, Croatian Register of Shipping, China Corporation Register of Shipping, China Classification Society, Korean Register of Shipping, Turk Loydu, Biro Klasifikasi Indonesia, Registo Internacional Naval, Indian Register of Shipping, International Naval Surveys Bureau, Asia Classification Society, Brazilian Register of Shipping, International Register of Shipping, Ships Classification Malaysia, Dromon Bureau of Shipping, Iranian Classification Society
Cleaning in transit
The stopping of articles (such as farm products) for cleaning at a point between the point of origin and destination.
Clearance
The size beyond which vessels, cars, or loads cannot pass through, under, or over bridges, tunnels, highways, and so forth.
Cleat
A metal fitting having two projecting arms or horns to which a halyard or other rope is belayed. The deck, side plating, a stanchion, or other convenient structure serves as a support for securing the cleat.
Clinchimg pan
A flat plate for clinching nails. (used in the mold loft.)
Clip
A 4” to 6” angle bar welded temporarily to floors, plates, webs, etc. It is used as a holdfast which, with the aid of a bolt, pulls objects up close in fitting. Also, short lengths of bar, generally angle, used to attached and connect the various members of the ship structure.
Clipper bow
A bow with an exterme forward rake, once familiar on sailing vessels.
Close butt
A joint fitted clese by griding, pulled tight by clips, and welded.
Club foot
The flattened, broadened after end of the stern foot.
CMG
Course Made Good
CMID
Common Marine Inspection Document
COA
Contract of Affreightment Owners agree to accept a cost per revenue ton for cargo carried on a specific number of voyages.
COACP
Contract of Affreightment Charter Party
Coaming
Strictly speaking, coamings are the fore and aft framing in hatchways and scuttles, while the athwartship pieces are called head ladges, but the name coaming is commonly applied to all raised framework about deck openings. Coamings prevent water from running below, as well as strengthen the deck about the hatches.
Coast Guard (CG)
A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to being a volunteer organization tasked with search and rescue without law enforcement authority. In most countries, a typical coast guard’s functions are distinct from those of the navy (a military service) and the transit police (a law enforcement agency), while in certain countries has similarities to both.
Coast Guard Radio (CGR)
Coast Station
A shore-based radio station operated by Coast Guard, RCC, etc.
COB
Close of Business
Cockpit
The well of a sailing vessel, especially a small boat, for the wheel and steerman.
COD
Cash On Delivery
Coeffi cients of fineness
These relate to the underwater form and give a broad indication of the hull shape. They are the ratios of certain areas and volumes to their circumscribing rectangles or prisms.
Cofferdam
A small space left open between two bulkheads as an air space, to protect another bulkhead from heat, fidre hazard or collision.
Coffin plate
The plate used on an enclosed twin bossing, named for its shape. In reality it is inverted boss plate.
COG
Course Over Ground
COGSA
Carriage of Goods by Sea Act
Coil
To lay down rope in circular turns.
Coils
A system of small diameter pipes installed inside a liquid cargo tank for the purpose of heating the cargo by means of hot oil or steam.
Collar
A ring used around a pipe or mast, or a flat plate made to fit around a girder or beam passing through a bulkhead. They serve to make various spaces watertight.
Collision bulkhead
A watertight bulkhead approximately 25′ aft of the bow, extending from the keel to the shelter deck. This bulkhead prevents the entire ship from being flooded in case of a collision.
Collision mat
A large mat used to close an aperture in a aperture in a vessel’s side resulting from a collision.
Colors
The national ensign.
Comehome
A convex curvature of the rake sides of a barge that produces a narrower beam at the headlog than the beam of the hull.
Coming around
To bring a sailing vessel into the wind and change to another tack. One who is influenced to a change of opinion.
Companion
A covering over the top of a companionway.
Companionway
A set of steps or ladder leading up to a deck from below.
Compartment
A subvision of space or room in a ship.
Compass, magnetic
The compass is the most important instrument of navigation in use on board ship, the path of a ship through the water depending upon the efficient.
Composite vessel
A vessel with a steel frame and wooden hull and decks
COMSAR
Sub-Committee on Radiocommunciations and Search and Rescue
CONCAWE
The Oil Companies’ European Organisation for Environment, Health and Safety
Concession
An arrangement whereby a private party (concessionaire) leases assets from an authorized public entity for an extended period and has responsibility for financing specified new fixed investments during the period and for providing specified services associated with the assets; in return, the concessionaire receives specified revenues from the opration of the ssets; the assets revert to the public sector at expiration of the contract.
Conning tower
Protective structure built up of armor plates and having verious shapes and sizes.
CONS
Consumption
Conservancy
In some countries, this fee is levied to retain upkeep of the approaches to waterways and canals.
Consolidation
Cargo consisting of shipments of two or more shippers or suppliers. Container load shipments may be consolidated for one or more consignees.
Container vessel
Vessel designed specifically for the transportation of standard size containers within the hull and on deck.
Contraband
Cargo that is prohibited.
Control
to command or direct communications; effected by the controlling station
COP
Custom Of Port
Cork fenders
A fender made of granulated cork and covered with woven tarred stuff.
Corrugated
Having a series of wrinkles or grooves arranged so as to produce stiffness.
Corrugated bulkhead
A bulkhead made from plates of corrugated metal or by flat plates alternately attached to the opposite flanges of the bulkhead stiffeners. Corrugated metal bulkheads are used around staterooms and quarters. Corrugated cargo hold bulkheads are generally constructed of flat plate alternately attached to opposite flanges of the stiffeners.
COSPAS-SARSAT
a satellite-aided Search and Rescue programme
COTP
Captain of the Port
Counter
The part of a ship’s stern which overhangs the stern post.
Countersunk hole
A hole tapered or beveled around its edge to allow a rivet or bolt head to seat flush with or below the surface of the bolts object.
Countersunk rivet
A rivet driven flush on one or both sides.
Cowl
The hood shaped top of a ventilator pipe.
CP (or C/P)
Charter Party
CPA
Closest Point of Approach
CPD
Charterers Pay Dues
CPR
Cardio Pulmonary Resuscitation
CPS-ECP
Abbreviation for Canadian Power and Sail Squadrons–Escadrilles Canadiennes de Plaisance
CPT
Carriage Paid To
CQD
Customary Quick Dispatch
Cradle
A framing built up on the ways and in which the ship rests while being launched.
Crater
A cup-shaped depression in a weld. The are tends to push the molten metal away from the center of the point being welded, thus forming the crater.
Crew’s gangway
Used on oil tankers. A elevated runway from poop to midship, and midship, and midship to forecastle deck. It affords means of safe passage for crew members when deck is awash in stormy weather.
Cribbing
Foundations of heavy blocks and timbers for supporting a vessel during construction.
CRN
Crane
CROB
Cargo Remaining on Board
Cross curves of stability
A series of curves showing how a ship’s transverse stability varies, with displacement, for a range of heel angles. Curve of statical stability. A plot showing how the righting lever experienced by a ship varies with angle as the ship is rotated about a fore and aft axis. It defi nes a ship’s stability at large angles. Also known as the GZ curve.
Crossheader
A pipeline that crosses over a tank providing a transit for cargo without tying into the vessel.
Crossing the line
Crossing the Equator.
Cross-spall
A temporary horizontal timber brace to hold a frame in position. Cross-spalls are replaced later by the deck beams.
Crow’s nest
The platform or tub on the mast for the look-out.
Crown
Term sometimes used denoting the round-up or camber of a deck. The crown of an anchor is located where the arms are welded to the shank.
Crown’s nest
A lookout station attached to or near the head of a mast.
Crutches
Same as breast hooks, but fitted at the after end.
CSC
Convention for Safe Containers
CSM
Cargo Securing Manual
CSR
Continuous Synopsis Record
CSSC
Code of Safe Practice for Stowage & Securing Cargo
CST
Centistoke
CTF
Carbon Task Force
CTR
Container Fitted
CTU
Cargo Transport Unit
Custom broker
A person or firm, licensed by the customs authority of their country when required, engaged in entering and clearing goods through customs for a client (importer).
Customhouse
A govenrment office where duties are paid, documents filed, and so forth, on foreign shipments.
Cutwater
The forward edge of the stem or prow of a vessel at the water level.
Cut-water
The foremost part of the stem, cutting the water as the vessel forges ahead.
CWA
Clean Water Act
Cyclodial propulsion system
A system of vertical blades that have taken the place of propellers for propulsion in some applications. Generically referred to as a “tractor system”.
D
D&A
Drug & Alcohol
Dagger
A piece of timber that is fastened to the poppets of the bilgeway and crosses them diagonally to keep them together. Dagger applies to anything that stands in a diagonal position.
Dagger plank
One of the planks whick unite the headsof the poppets or stepping-up pieces of the cradle on which the vessel rests in launching.
Dakum
A material made of tarred rope fibers obtained from scrap rope, used for calking seams in a wooden deck. It is also used for calking around pipes.
DAPS
Days all Purposes (Total days for loading & discharging)
Davit
A curved metal spar for handling a boat or other heavy objects.
Davits
A set of cranes or radial arms on the gunwale of a ship, from whick are suspended the lifeboats.
DDC
Deck Decompression Chamber
DDP
Delivered Duty Paid.
DDU
Delivered Duty unpaid.
DE
Design and Equipment
Dead ahead
Directly ahead on the extension of the ship’s fore and aft line.
Dead flat
The flat-surfaced midship section of a vessel on the sides above the bilge, or on the bottom below the bilge.
Dead light
Steel disc, that is dogged down over a porthole to secure against breakage of the glass and to prevent light from showing through.
Dead rise
The upward slope of a ship’s bottom from the keel to the bilge. This rise is to give drainage of oil or water toward the center of the ship.
Deadlifht
A shutter placed over a cabin window in stormy weather to protect the glass against the waves.
Deadlight
Steel or alloy cover plate fitted internally to portholes for protection against water ingress in case of glass failure.
Deadman
An object, such as an anchor, piling, or concrete block, buried on shore.
Deadrise
Transverse inclination of the hull bottom from keel to bilge. [Alt rise of floor.]
Deadweight
The total weight of cargo, fuel, water, stores, passengers and crew and their effects that a ship can carry when at her designed full-load draft.
Deadweight tonnage
The cargo capacity of a vessel.
Deck
A platform or horizontal floor which extends from side to sede of a vessel.
Deck beam dimensions
The molding of a deck beam is its vertied dimension. Its siding is its horizontal dimension.
Deck button
A round, steel fitting affixed to a vessel’s deck, designed to secure or guide cables for making up barge tows.
Deck height
Vertical distance between moulded lines of 2 adjacent decks. [Alt deck interval.]
Deck house
A small house on the after or midship section of a vessel.
Deck lashing strap
A steel deck fitting normally used as an attachment for cargo tie down lines.
Deck stringer
The strip of deck plating that runs along the outer adge of a deck.
Declivity
Inclination of shipways to provide for launching.
Deconsolidation point
Place where cargo is ungrouped for delivery.
Deep floor
A term applied to any of the floors in the forward or after end of a vessel. Due to the converging sides of ships in the bow and stern, the floors become much deeper than in the main body.
Deep frame
A web frame or a frame whose athwartship dimension is over the general amount.
Deep tank
Tank (usually for fuel) having significant depth (typically spanning more than 1 deck interval).
Deep tanks
These usually consist of ordinary hold compartments, but strengthened to carry water ballast. They are placed at either or both ends of the engine and boiler space. They are placed at either or both ends of the engine and boiler space. They are placed st either or both ends of the engine and boiler space. They usaually run from the tank top up to or above the lower deck.
DEM
Demurrage
Demurrage
A penalty charge against shippers or consignees for delaying the carrier’s equipment beyond the allowed free time. The free time and demurage charges are set forth in the charter party or freight tariff.
Derelict
A vessel obandoned and drifting aimlessly at sea.
Derrick
A device consisting of a kingpost, boom with variable topping lift, and necessary rigging for hoisting heavy weights, cargo, etc.
DESP
Dispatch
DET
Detention
Development
The method of drawing the same lines on a flat surface which have already been drawn on a curved surface. The shapes and lines produced by development are the same as though the curved surface from which they are taken were a flexible sheet which could be spread out flat without change of area or distortion.
DHDATSBE
Dispatch Half Demurrage on Actual Time Saved Both Ends
DHDWTSBE
Dispatch Half Demurrage on Working Time Saved Both Ends
Diagonal line
A line cutting the body plan diagonally from the frames to the middle line in the loft layout.
Diesel generator
Alternator (generator) directly powered by a diesel prime mover producing AC electrical power. 9kw marine diesel generator
Dinghy
A small auxiliary vessel carried or towed by the main vessel.
Dip
A position of a flag when lowered part way in salute (method of salute between vessels, like planes dipping wings).
Direction Finder
a type of electronic equipment used to obtain bearings from radio signals
DISCH
Discharge
Displacement
The weight in tons of the water displaced by a ship. This weight is the same as the total weight of the ship when afloat. Displacement may be expressed either in cubic feet or tons, a cubic foot of sea water weighs 64 pounds and one of fresh water weighs 62.5 pounds, consequently one ton is equal to 35 cubic feet of sea water or 35.9 feet of fresh water. The designed displacement of a vessel is her displacement when floating at her designed draft.
Distress Communication
the type of communication used when a station is in ‘grave and imminent danger’ and requires ‘immediate assistance’; the Distress traffic that follows the Distress signal
Distress signal
A flag display or a sound, light, or radio signal calling for assistance.
Ditty-bag
A small bag used by seamen for stowing small articles.
DK
Deck
DLOSP
Dropping Last Outwards Sea Pilot (Norway)
DMLC
Decleration of Maritime Labour Convention
DNRSAOCLONL
Discountless and Non-Returnable Ship and/or Cargo Lost or Not Lost
DO
Diesel Oil
DOB
Date of Birth
Dock
A basin for the reception of vessels. “Wet” docks are utilized for the loading and unloading of ships.
Docking plan
Detailed structural plan and profile of the lower hull structure required for correct location of the vessel in dry docking.
Dog
A hold fast, a short metal rod or bar fashioned to form a clamp or clip and used for holding watertight doors, manholes, or pieces of work in place.
Dog shores
The last supports to be knocked away at the launching of a ship.
Doldrums
The belt on each side of the Equator in which little or no wind ordinarily blows.
Dolly bar
A heavy bar to hold against a rivet, to give backing when riveting.
Dolphin
A cluster of piles driven into the bottom of a waterway and bound firmly together for the mooring of vessels.
DOLSP
Dropping Off Last Sea Pilot (Norway)
Donkey engine
A small gass, stem or electric auxiliary engine, set on the deck and used for lifting, etc.
DOP
Dropping Outward Pilot
DOT
Department of Transport
Double bottom
A tank whose bottom is formed by the bottom plates of a ship, used to hold water for ballast, for the storage of oil, etc. Also a term applied to the space between the inner and outer bottom skins of a vessel. Also applied to indicate that a ship has a complete inner or extra envelopeof watertight bottom plating. A double bottom is usually fitted in large ships extending from bilge to bilge and nearly the whole length fore-and-aft.
Double skin
Double watertight hull construction, usually referring to hull sides but may include double bottom structure.
Double up
To double a vessel’s mooring lines.
Doubler
A steel plate installed on an existing structural plate and used as a strengthening base for deck fittings or as a repair of a damaged area.
Doubling plates
Extra plates (bars or stiffeners, added to strengthen sections where holes have been cut for hawse pipes, machinery, etc. Also placed where strain or wear is expected.
Dowel
A pin of wood inserted in the edge or face of two boards or pieces to secure them together.
Dowse
To take in, or lower a sail. To put out a light. To cover with water.
DR
Dead Reckoning
Draft
The distance from the surface of the water to the ship’s keel (how deep the ship is into the water).
DRAFT
Depth to which a ship is immersed in water. The depth varies according to the design of the ship and will be greater or lesser depending not only on the weight of the ship and everything on board, but also on the density of the water in which the ship is lying.
DRAFT (DRAUGHT) (of a vessel)
The depth of a vessel below the waterline measured vertically to the lowest part of the hull, propellers or other reference points.
Draft , extreme
Draft measured to the lowest projecting portion of the vessel
Draft marks
Numbers marked on the hull side forward, aft (and amidships on large vessels) indicating the draft.
Draft(or draught)
Depth to which a hull is immersed.
Draft, aft
Draft measured at the stern.
Draft, forward
Draft measured at the bow.
Draft, load
Draft at load displacement.
Draft, marks
The numbers which are placed in a vertical scale at the bow and the stern of a vessel to indicate the draft at each point.
Draft, mean
The average between draft measured at bow and at stern, or for a vessel with a straight keel, the darft measured at the middle length af waterline.
Drag
The amount that the aft end of the keel is below the forward end when the ship is afloat with the stern end down.
Drain well
The chamber into which seepage water is collected and pumped by drainage pumps into sea through pump dales.
Dredger
Vessel designed for the removal of sea bed alluvial sediment. Deepen access channels, provide turning basins for ships, and maintain adequate water depth along waterside facilities.
Dressing ship
A display of national colors at all mastheads and the array of signal flags from bow to stern over the masthead (for special occasions and holidays).
Drift angle
The angle between a ship’s head and the direction in which it is moving.
Drift pin
A conical-shaped pin gradually tapered from blunt point to a diameter a little larger than the rivet holes in which it is to be used. The point is inserted in rivet holes that are not fair, and the other end is hammered until the holes are forced into line.
Drill ship
Vessel designed for sea bed drilling operations.
Drip pan
An open container, located on deck under the ends of a pipeline header to retain cargo drippage.
DRK
Derrick
Drop strake
A strake discontinued near the bow or stern.
Dry bulk
Cargo shipped in a dry state and in bulk; e.g., grain, cement.
Dry dock
(1) Large basin with sealing caisson for the repair and maintenance of vessels. (2) General term for basin dry docks, floating docks or lift platforms for the maintenance and repair of vessels.
Dry docks
A dock into which a vessel is flated, the water than being removed to allow for the construction or repair of ships.
DSC
Digital S elective Calling
Duct
Vertical or horizontal large cross-section conduit through which piping, cabling, or fluids may be conducted.
Duct keel
Longitudinal passage within the double bottom, usually on the centreline, extending from the collision bulkhead to the engine room, through which ballast, bilge, fuel and hydraulic piping may be conducted and providing access to double-bottom spaces.
Ductility
That property of a metal which permits its being drawn out into a thread or wire.
Dumb vessel
A vessel without means of self-propulsion.
Dungarees
Blue working overalls.
Dunnage
Any materials used to block or brace cargo to prevent its motion, chafing, or damage and to facilitate its handling.
DUNNAGE
Materials of various types, often timber or matting, placed among the cargo for separation, and hence protection from damage, for ventilation and, in the case of certain cargoes, to provide space in which the forks of a lift truck may be inserted.
Duplex
a radio channel using two different frequencies; one for transmitting and the other for receiving
Duplicating pipe
A piece of tubing, generally brass, used with paint to transfer rivet hole layout from template to plate. The end pf the pipe is dipped in paint, and while still wet is pushed through each template hole, leaving an impression on the plate.
Dutchman
A piece of steel fitted into an opening to cover up poor joints, or the crevices caused by poor workmanship.
DWAT (or DWT)
Deadweight. Weight of cargo, stores and water, i.e. the difference between lightship and loaded displacement.
E
Eagle Flies
Pay day
Easy
Carefully (watch what you’re doing).
EBL
Electronic Range Line
EC
East Coast
ECDIS
Electronic Chart Display & Information System
ECSA
European Community Shipowners Association
EDI – Electronic data interchange
Transmission of transactional data between computer systems.
EDIFACT
Electronic Data Interchange for Administration, Commerce, and Trade. International data interchange standards sponsored by United Nations.
EEDI
Energy Efficient Design Index
EETF
Eastern European Terminal Forum
EEZ
Exclusive Economic Zone
EHQ
Emergency Head Quarters
EIU
Even if Used
Electrode
A pole or terminal in an electrical circuit. See Polarity.
Electro-hydraulic
Term given to hydraulic actuation systems where the hydraulic pressure is produced by electrically driven pumps and controlled via solenoids.
ELVENT
Electric Ventilation
EMR
Effective Mooring Revision
EMS
Environmental Management System
EMSA
European Maritime Safety Authority
ENC
Electronic Navigational Chart
End seizing
A round seizing at the end of a rope.
End-for-end
Reversing the position of an object or line.
Endurance
Maximum time period (indicated in hours or days) that a vessel can operate unreplenished while performing its intended role.
Engine control room
Space adjacent to engine room from where engine room systems may be controlled and monitored.
Engine room
Space where the main engines of a ship are located.
ENOA
Electronic Notice of Arrival
Ensign
(1) The national flag. (2) A junior officer.
Entrance
The forward under-water portion of a vessel at and near the bow.
EOS
Engine Operating Station
EPA
Environmental Protection Agency
EPIRB
Emergency Position Indicating Radio Beacon.
Erection
The process of hoisting into place and joining the various parts of a ship’s hull, machinery, etc.
ESPH
Evaluation of Safety and Pollution Hazards
ETA
Estimated Time of A rrival
ETC
Estimated Time of Completion
ETD
Estimated Time of Departure
ETOPS
Emergency Towing-off Pennant System
ETS
Environmental Tags System
Even keel
When a boat redes on an even keel, its plane of flotation is either coincident or parallel to the designed water line.
EVTMS
Enhanced Vessel Traffic Management System
EXCOM
Executive Committee
Expansion joint
A term applied to a joint which permits linear movement to take up the expansion and contraction due to changes in temperature.
Expansion trunk
A raised enclosure around an opening in the top of a liquid cargo tank which allows for heat expansion of the cargo.
Expansion trunks
Trunkways extending a short way into oil tanker compartments from the hatches. When the compartment is filled, the trunk is partly filled, and thus cuts down the free surface of the cargo, improving stability. Free space at the top is left for any expansion of the oil.
EXW
Ex Works
Eye
The forward end of the spacs below the upper decks of a ship which lies next abaft the stem, where the sides approach very near to each other. The hawse pipes are usually run down through the eyes of a ship.
Eye bolt
A bolt having either a head looped to form a worked eye, or a solid head with a hole drilled through it forming a shackle eye. Its use is similar to that of a pad eye.
Eye plate
Fitting used for mooring arrangements.
F
Fabricate
To shape, assemble and secure in place the component parts in order to form a complete job.
Face plate
A narrow stiffening plate welded alone the edge of any web frame or stiffener.
Factory ship
High endurance vessels designed for processing and packing whale or fish resources off-loaded by smaller whaling or fishing vessels.
Fair
To fair a line means to even out curves, sheer lines, deck lines etc., in drawing and mold loft work.
Fairing or Fairing up
Correcting or fairing up a ship’s lines or structural members; assembling the parts of ship so that they will be fair, that is, without kinks, bumps, or waves.
Fairlead
A device consisting of pulleys or rollers arranged to permit the reeling in of a cable from any direction; often used in conjunction with winches and similar apparatus.
Fairwater
Plating fitted, in the shape of a frustrum of a cone, around the ends of shaft tubes and struts to prevent an abrupt change in the stream lines. Also any casting or plate fitted to the hull for the purpose of preserving a smooth flow of water.
Fake
A single turn of rope when a rope is coiled down.
Fake down
To fake line back and forth on deck.
FAL
Facilitation Committee
Fall
Commonly the antire length of rope used in a tackle, though strictly it means only the end to which the power is applied.
Fantail
The overhanging stern section of a vessel, from the stern post aft.
FAS
Free Alongside Ship. Seller delivers goods to appropriate dock or terminal at port of embarkation and buyer covers costs and risks of loading.
Fathom
Six feet. A sea-going measure of length.
Fay
To unite closely two planks or plates, so as to bring the surfaces into nitimate contact.
Faying surface
The contact surface between two adjoining parts.
FD
Free of Dispatch
FDD
Freight Demurrage Deadfreight
FDIS
Free Discharge
Feeder service
Transport service whereby loaded or empty containers in a regional are transferred to a “mother ship” for a long-haul ocean voyage.
Felloes
Pieces of wood which from the rim of a wheel.
Fend off
To push off when making a landing.
Fender
This term is applied to various devices fastened to or hung over the sides of a vessel for the purpose of preventing rubbing or chafting. On small craft, such as tug boats, it consists of a timber or steel structure running fore and aft along the outside of the vessel above the water line. On the wearing surface. a strip of iron bark or a piece of flat bar iron is attached.
Ferry
Vessel used to convey passengers and/or vehicles on a regular schedule between 2 or more points.
FEU
Forty foot container equivalency unit Standard 40′ Container
FHEX
Fridays/Holidays Excluded
FHINC
Fridays/Holidays Included
Fid
A tapered wooden pin used to separate the strands when splicing heavy rope.
Fidley
Framework built around a deck hatch ladder, leading below.
Fidley deck
A partially raised deck over the engine and boiler rooms, usually around the smokestack.
Field day
A day for general ship cleaning.
Figurehead
The bust, often of a woman, on the bow of a vessel, just under the bowscript.
Fillet
The rounded edge of a rolled steel angle or bar.
FILO
Free In/Liner Out. Seafreight with which the shipper pays load costs and the carrier pays for discharge costs.
Fin
A projecting keel.
FIO
Free In/Out. Freight booked FIO includes the sea freight, but no loading/discharging costs, i.e. the charterer pays for cost of loading and discharging cargo.
FIOS
Free In/Out Stowed. As per FIO, but includes stowage costs.
FIOSLSD
Free In/Out Stowed, Lashed, Secured and Dunnaged. As per FIO, but includes cost of lashing securing and dunnaging cargo to Masters satisfaction.
FIOST
Free In/Out and Trimmed. Charterer pays for cost of loading/discharging cargo, including stowage and trimming.
FIOT
Free In/Out and Trimmed. As per FIOS but includes trimming the leveling of bulk cargoes
Fish plate
A triangular-shaped steel plate used to strengthen the connection between the towing bridle and the towing hawser.
FIT
Free In Trimmed
FIW
Free In Wagon
Fixed costs
Costs that do not vary with the level of activity. Some fixed costs continue even if no cargo is carried; for example, terminal bases, rent, and property taxes.
FIXING
Chartering a Vessel
Flag State
The nation in which a vessel is registered and which holds legal jurisdiction as regards operation of the vessel, at home or abroad.
Flagstaff
Flag pole, usually at the stern of a ship, carries the ensign.
Flame screen
A corrosion-resistant fine wire mesh screen used to cover certain openings on tank vessels to prevent the passage of flame into the tank.
Flange
The turned edge of a shape or girder, which acts to resist bending strain.
Flare
Outward curvature or widening of the hull above the waterline present in the bow section (of a conventional bow) to avoid shipping water.
Flared bow
A bow with an extreme flare at the upper and forcastle deck.
Flat
A small partial deck, built level, without curvature.
Flemish down
To coil flat down on deck, each fake outside the other, beginning in the middle and all close together.
Floating drydock
A U-shaped dock with double skins which is filled by opening up the sillcocks, and allowed to settle sothe middle section will be lower than the keel of the ship so that repairs can be made on her hull.
Floodable length
The length of the hull, at any point, that can fl ood without immersing the margin line. Important in studying the safety of ships.
Floor
Vertical transverse full-breadth plating between inner bottom and bottom shell plating.
Floor plan
A horizontal section, showing the ship as divided at a water or deck line.
Floors
Vertical flat plates running transverse of the vessel, connecting the vertical keel with the margin plates or the frames to which the tank top and bottom shell is fast-ened.
Flotsam
The parts of a wrecked ship and goods lost in shipwreck, both found floating.
FLT
Full Liner Terms Shipowner pays to load and discharge the cargo
Fluke
The palm of an anchor. The broad holding portion which penetrates the ground.
Flush deck
A deck running from stem without being broken by forecastle or poop.
Flush deck hatch
Hatch in a deck with no coaming.
Flush deck ship
Vessel having an upper deck extend continuously from bow to stern.
Flux
A substance such us as borax, used in welding to help in the melting of the metal. Flux also serves to stabilize the electric arc, steady the flow of the filler metal into the weld and protect the weld from oxidation.
FMC
Federal Maritime Commission US government agency
FMS
Fathoms 6 feet
FO (IFO)
Fuel Oil/Intermediate FO
Fo’c’sle
A modem version of the old term “forecastle,” or bow section of the ship, where the crew lived.
FOB
Free on Board. Seller sees the goods “over the ship’s rail” on to the ship which is arranged and paid for by the buyer
Fodley hatch
Hatch around smokestack and uptake.
FOFFER
Firm Offer
FOG
For Our Guidance
Fog horn
A sound signal device (not necessarily mechanically operated).
Fog-bound
Said of a vessel when forced to heave to or lie at anchor due to fog.
FOQ
Free On Quay
FOR
Free On Rail
Force majeure
The tittle of a common clause in contracts, exempting the parties from nonfulfillment of their obligations as a result of conditions beyond their control, such as earthquakes, floods, or war.
FORCE MAJEURE
Clause limiting responsibilities of the charterers, shippers and receivers due to events beyond their control.
Fore and aft
Parallel to the ship’s centerline.
Fore peak
The narrow extremity of a vessel’s bow. Also the hold space within it.
Fore peak tank
Tank (often for ballast/trimming) forward of the collision bulkhead.
Fore rake
The forward part of the bow which overhangs the keel.
Fore, forward
Toward the stem. Between the stem and amidships.
Forebody
That part of a hull forward of amidships.
Forecastle
Raised and enclosed forward superstructure section of the hull.
Forecastle deck
A deck over the main deck at the bow.
Foredeck
Foremost section of exposed main deck.
Forefoot
The forward end of a vessel’s stem which is stepped on the keel.
Forehook
Or breast hook.
Forepeak bulkhead
The bulkhead nearest the stem, which forms the after boundary of the forepeak tank. When this bulkhead is extended from the bottom of the ship to the weather deck, it is also called the collision bulkhead.
Forest product carrier
Vessel designed for the transportation of processed timber with large hatchways simplifying stowage and transfer of cargo.
Forging
A mass of metal worked to a special shape by hammering, bending, or pressing while hot.
Fork beam
A half beam to support a deck where hatchways occur.
Formal safety assessment (FSA)
A process for assessing the safety of a ship by studying the risks, their likelihood and consequences.
Forty-foot equivalent unit (FEU)
Unit of measurement equivalent to one forty-foot container. Two twenty foot containers (TEUs) equal on FEU.
Forward
Towards or at the fore end of a vessel. (Abbr. Fwd or For’d.)
Forward perpendicular
A line perpendicular to the keel line, and intersecting the forward side of the stem at the designed load water line.
FOT
Free On Truck
Foul
Jammed, not clear.
Fouled hawse
Said of the anchor chain when moored and the chain does not lead clear of another chain.
Found
To fit and bed firmly. Also, equipped.
Founder
To sink (out of control).
FOW (1)
First Open Water
FOW (2)
Free On Wharf
FPD
Fall Preventing Device
FPSO
Floating production, storage and offloading vessel.
Frame
Vertical structural component supporting and/or stiffening hull side plating and maintaining the transverse form.
Frame head
The section of a frame that rises above the deck line.
Frame lines
Lines of a vessel as laid out on the mold loft floor, showing the form and popsition of the grames. Also the line of intersection of shell with heel of frame.
Frame spacing
The fore-and-aft distances between frames, heel to heel.
Frame station(s)
Points at which transverse frames (or floors) are located, indicated on the baseline, numbered from zero at the aft perpendicular and terminating at or beyond the forward perpendicular. Stations abaft the aft perpendicular are numbered negatively.
Frames
The ribs of a ship.
FRC
Fast Rescue Craft
FREE OUT
Free of discharge costs to Owners
Freeboard
Vertical measurement from the vessel’s side amidships from the load waterline to the upperside of the freeboard deck.
Freeboard deck
The uppermost complete deck exposed to weather and sea, which has permanent means of weathertight closing of all openings in the exposed part, and below which all openings in the vessel’s sides are fitted with permanent means of watertight closing.
Freefall lifeboat
Some ships have freefall lifeboats, stored on a downward sloping slipway, dropping into the water as holdback is released. Such lifeboats are considerably heavier to survive the impact with water. Freefall lifeboats are used for their capability to launch nearly instantly and high reliability, and since 2006 are required on bulk carriers that are in danger of sinking too rapidly for conventional lifeboats to be released. Tankers are required to carry fireproof lifeboats, tested to survive a flaming oil or petroleum product spill from the tanker. Fire protection of such boats is provided by insulation and sprinkler system, which has pipe system on top, through which water is pumped and sprayed to cool the surface. This system, while prone to engine failure, allows fireproof lifeboats to be built of fiberglass and not only metal.
Freeing port
A large opening in the bulwark on an exposed deck of a seagoing vessel which provides for the rapid draining of water from that deck.
Freeing ports
Heles in the bulwark or rail, which allow deck wash to drain off into the sea. Some freeing ports have swing gates which allow water to drain off but which aytomatically close from sea water pressure.
Freight, demurrage, and defence
Class of insurance provided by a protection and indemnity (P&I) club that covers legal costs incurred by a shipowner in connection with claims arising from the operation of the ship.
Freighter
A ship designed to carry all types of general cargo, or “dry cargo.”
Frequency
the number of radio waves per second
FRS
Family Radio Service. Very short range radios – approximately 2 km.
FSE
Free Surface Effect
FSG
Floating Systems Group
FSI
Flag State Implementation
FSS
Fire Safety Systems
FSU
Floating Storage Unit
Funnel
External fairing through which exhaust ducting is conducted.
Furrings
Strips of timber or boards fastened to frames, joists, etc., in order to bring their faces to the required shape or level, for attachment of sheating, ceiling, flooring etc.
FWAD
Fresh Water Arrival Draft
FWDD
Fresh Water Departure Draft
FYG
For Your Guidance
FYI
For Your Information
G
G.I.
Anything of Government Issue.
GA
General Average
Gadget
A slang term applied to various fittings.
Gage
A standard of measure.
Galley
Kitchen compartment aboard a vessel.
Galvanizing
The process of coating one metal with another, ordinarily applied to the coating or iron or steel with zinc. The chief purpose of galvanizing is to prevent corrosion.
Gang board
Same as gang plank.
Gang plank
A board with cleats forming a bridge reaching from a gengway of a vessel to the wharf.
Gangway
The opening in the bulkwarks of a vessel through which persons come on board of disembark. Also a gang plank.
Gantline
A line rove through a single block secured aloft.
Gantry
High level structure supporting a traversing lifting appliance.
Garboard strake
Strake (line) of shell plating immediately adjacent to the keel (centreline) plating.
Gas carrier
Tanker designed for the transportation of liquefied gases.
Gas free
The process of removing all hazardous gases and residues from the compartments of a vessel
Gasket
An elastic packing material used for making joints watertight.
Gaskets
Packing materials, by which air, water, oil, or steam tightness is secured in such places as on doors, hatches, steam cylinders, manhole covers, or in valves, between the flanges of pipes, etc. Such materials as rubber, canvas, asbestos, paper, sheet lead and copper, soft iron, and commercial products are extensively used.
Gateway
A point at which freight moving from one territory to another is interchanged between trasportation lines.
Gather way
To attain headway (to get going or pick up speed).
Gauge
A waterway marker which measures the level of the water in foot increments; also refers to the specific measure on the gauge.
GBS
Goal Based Standard
Gear
The general name for ropes, blocks and tackles, tools, etc. (things).
General arrangement
Highly detailed plan drawings of the general layout of a vessel.
GHG
Green House Gas
Gib
A metal fitting that holds a member in place, or presses two members together.
Gilguy (or gadget)
A term used to designate an object for which the correct name has been forgotten.
Gipsey (gypsey)
A drum of a windlass for heaving in line.
Girder
(1) Longitudinal continuous member with a vertical web providing support of deck beams. (2) Longitudinal continuous vertical plating on the bottom of single- or double-bottomed vessels.
Girth
The distance measured on any frame line, from the intersection of the upper deck with the side, around the body of the vessel to corresponding point on the opposite side. The half gith is taken from the center line of the keel to the upper deck beam end.
GISIS
Global Integrated Shipping Information System
Glass
Term used by mariners for a barometer.
Glory hole
Steward’s quarters.
GLS
Gearless
GMDSS
Global Maritime Distress and Safety System.
GMPHOM
Guide to Manufacturing & Purchasing Hoses for Offshore Moorings
GMRS
General Mobile Radio Service.
GN (or GR)
Grain (capacity)
GNCN
Gencon a standard BIMCO charter party form
GNSS
Global Navigation Satellite Systems
GO
Gas Oil
Go adrift
Break loose.
Golden Slippers
Tan work shoes issued to U.S. Maritime Service trainees
Gooseneck
A return, or 180o bend, having one leg shorterthan the other. An iron swivel making up the fastening between a boom and a mast. It consists of a pintle and an eyebolt, or clamp.
Gouge
Atool with an half round cutting edge used to cut grooves.
GPC
General Purposes Committee
GPS
Global P ositioning System using satellites to determine position
Grapnel
A small anchor with several arms used for dragging purposes.
Grating
A wooden lattice-work covering a hatch or the bottom boards of a boat; similarly designed gratings of metal are frequently found on shipboard.
Graveyard watch
The middle watch.
Graving docks
A dry dock. The vessel is floated in, and gates at the entrance closed when the tide is at ebb. The remaining water isthen pumped out, and the vessel’s bottom is graved, or cleaned.
GRD
Geared
Green sea
A large body of water taken aboard (ship a sea).
Greenwich Mean Time (GMT)
also known as Coordinated Universal Time (UTC); normally used in all radio telecommunications. The letter “Z” is an accepted abbreviation.
Grids
Metal protective bars of sea chests and propeller thrusters.
Gripe
The sharp forward end of the dished keel on which the stem is fixed.
Grommet
A reing of fiber usually soaked in red lead or some other packing material, and used under the heads of bolts and nuts to preserve tightness.
Gross registered tonnage
A formula-derived measure of the internal (enclosed) volume of a vessel less certain excluded spaces. (Stated in volumetric tons where 1 ton = 100 ft3 , 2.8317 m3.) (Abbr. grt.)
Gross tons
The volume measurement of the internal voids of a vessel wherein 100 cu. ft. equals one ton.
Ground tackle
A term used to cover all of the anchor gear.
Grounding
Running ashore (hitting the bottom).
Groundways
Large pieces of timber laid across the ways on which the keel blocks are placed. Also the large blocks and plans which support the cradle on which a ship is launched.
Groupage
The grouping together of several compatible consignments into a full container load. Also referred to as consolidation.
GRP
Glass Reinforced Plastic
GRS
General Radio S ervice; commonly known as Citizens’ Band radio
GRT
Gross Registered Tonnage
GSB
Good Safe Berth
GSP
Good Safe Port
GT
Gross Tons.
GTEE
Guarantee
Gudgeon
A metallic eye bolted to the stern post, on which the rubber is hung.
Gunwale
The upper edge of a vessel or boat’s side.
Gunwale (gunnel)
That part of a barge or boat where the main deck and the side meet.
Gunwale bar
A term applied to the bar connecting a stringer plate on a weather deck to the sheer strake.
Gusset
A steel plate used for reinforcing or bracing the junction of other steel members.
Gusset plate
A tie plate, used for fastening posts, frames, beams, etc., to other objects.
Gutter ledge
A bar laid across a hatchway to support the hatches.
Gutterway
The sunken trough on the shelter deck outer edge which disposes of the water from the deck wash.
Guys
Wire or hemp rope or chains to support nooms, davits, ets., laterally. Guys are employed in pairs. Where a span is fitted between two booms, for example, one pair only is required for the two.
GZ
The distance from the centre of gravity to the line of action of the buoyancy force. It is a measure of a ship’s ability to resist heeling moments.
H
HA
Hatch
HAEMHF
Hose Ancillary Equipment & Managing Hoses in the Field
Hail
To address a vessel, to come from, as to hail from some port (call).
Half deck
A short deck below the main deck.
Half model
A modle of one side of a ship, on which the plate lines are drawn in.
Half-breadth plan
A plan or top view of half of a ship divided longitudinally. It shows the water lines, bow and buttock lines, and diagonal lines of construction.
Half-mast
The position of a flag when lowered halfway down.
Halliards or halyards
Ropes used for hoisting gaffs and sails, and signal flags.
Hand
A member of the ship’s company.
Hand lead
A lead of from 7 to 14 pounds used with the hand lead line for ascertaining the depth of water in entering or leaving a harbor. (Line marked to 20 fathoms.)
Hand rail
A steadying rail of a ladder (banister).
Hand rope
Same as “grab rope” (rope).
Hand taut
As tight as can be pulled by hand.
Hand-over
Term used in contracts, meaning the process of providing exclusive, unencumbered, peaceful, and vacant possession of and access to a concession area and the existing operational port infrastructure and also all rights, title and interest in all the movable assets and all the facilities by the government or the port authority on the hand over date for the conduct of terminal operations.
Handybilly
A watch tackle (small, handy block and tackle for general use).
Handymax
Dry bulk carrier of 35 – 50,000 tonnes deadweight, popular for full efficiency, flexibility and low draft (<12 m).
Handysize
A term applied to bulk carriers of 40 000–65 000 DWT.
Hang from the yards
Dangle a man from one of the yard arms, sometimes by the neck, if the man was to be killed, and sometimes by the toes, if he was merely to be tortured. A severe punishment used aboard sailing ships long ago. Today, a reprimand.
Hard patch
A plate riveted over another plate to cover a hole or break.
Harpings
The fore parts of the wales of a vessel which compass her bows and are fastened to the stem, thickened to withstand plunging.
Hatch
Opening in a deck providing access for cargo, personnel, stores, etc.
Hatch bars
The bars by which the hatches are fastened down.
Hatch coaming
Raised rim of vertical plating around a hatchway to prevent entrance of water, the upper edge of which forms a sealing surface with the hatch-lid or cover.
Hatchway
One of the large square openings in the deck of a ship through which freight is hoisted in or out, and access is had to the hold. There are four pieces in the frame of a hatchway. The fore-and-aft pieces are called coaming and those athwartship are called head ledges. The head ledges rest on the beams and the carlines extending between the beams. There may be forward, main and after hatcheays, according to the size and character of the vessel.
Hawse
The part of a ship’s bow in which are the hawse holes for the anchor chains.
Hawse buckler
An iron plate covering a hawse hole.
Hawse hole
A hole in the boow through which a cable or chain passes. It is a cast steel tube, having rounded projecting lipe both inside and out.
Hawse pipe
Steel pipe duct through which the anchor cable is led overboard.
Hawse plug or block
A stopper used to prevent water from entering the hawse hole in heavy weather.
Hawse-pipes
A pipe lead-in for anchor chain through ship’s bow.
Hawser
A large circumference rope used for towing or mooring a vessel or for securing it at a dock.
Hawser-laid
Left-handed rope of nine strands, in the form of three three-stranded, right-handed ropes.
HCFC
Hydro Chloro Fluoro Carbons
HDWTS
Half Dispatch Working Time Saved
Head
(1) The bow of a vessel. (2) Term given to toilet facilities usually in the smaller craft context.
Head ledges
See Hatchway
Head of navigation
The uppermost limit of navigation from the mouth of a waterway.
Head room
The height of the decks, below decks.
Headlog
The reinforced, vertical plate which connects the bow rake bottom to the rake deck of a barge or square-stemmed boat.
Heart
The inside center strand of rope.
Heave
The vertical movement of a ship, as a rigid body, in a seaway.
Heave around
To revolve the drum of a capstan, winch or windlass. (Pulling with mechanical deck heaving gear).
Heave away
An order to haul away or to heave around a capstan (pull).
Heave in
To haul in.
Heave short
To heave in until the vessel is riding nearly over her anchor.
Heave taut
To haul in until the line has a strain upon it.
Heave the lead
The operation of taking a sounding with the hand lead (to find bottom).
Heave to
To bring vessel on a course on which she rides easily and hold her there by the use of the ship’s engines (holding a position).
Heaving line
A small line thrown to an approaching vessel, or a dock as a messenger.
Heavy-lift vessel
Vessel designed specifically for the loading/discharge and transportation of very heavy cargoes.
Heel
Inclination of a vessel to one side. [Alt list.]
Height
Vertical distance between any two decks, or vertical distance measured from the base line to any water line.
Helm
A term applied to the tiller, wheel, or steering gear, and also the rubber.
Helm port
The hole in the counter of a vessel through which the rubber stock passes.
Hemp
Rope made of the fibers of the hemp plant and used for small stuff or less than 24 thread (1.75 inch circumference). (Rope is measured by circumference, wire by diameter.)
HF
High Frequency radio (3 MHz – 30 MHz).
HGWG
Mercury Working Group
High, wide and handsome
Sailing ship with a favorable wind, sailing dry and easily. A person riding the crest of good fortune
Hip towing (hipping)
A method of towing whereby the vessel being towed is secured along-side the towboat
HMS
Heavy Metal Scrap
HNS
Hazardous and Noxious Substances
HO
Hold
Hog
A scrub-broom for scraping a ship’s bottom under water.
Hog frame
A fore-and-aft frame, forming a truss for the main frames of a vessel, to prevent bending.
Hog sheer
The curve of the deck on a vessel constructed so that the middle is higher than the ends.
Hogged
A ship that is damaged or strained so that the bottom curves upward in the middle opposite of sagged.
Hogging
A ship is said to hog when the hull is bent concave downwards by the forces acting on it. Hogging is the opposite of sagging.
Hoist away
An order to haul up.
Hold
That part of a ship where cargo or supplies are carried.
Hold beams
The beams that support the lower deck in a cargo vessel.
Hold fast
A dog or brace to hold objects rigidly in place.
Holiday
An imperfection, spots left unfinished in cleaning or painting.
Holy stone
The soft sandstone block sailors use to scrub the deck, so-called, because seamen were on their knees to use it.
Hood
A covering for a companion hatch, scuttle or skylight.
Hooding-end
The endmost plate of a complete strake. The hooding-ends fit into the stem or stern post.
Hopper barge
Barge designed with a single hopper type hold for the transport of bulk cargo and where the cargo is discharged (dumped) through the bottom of the vessel.
Hopper tank
Lower side ballast tank in a bulk carrier, shaped and positioned to create a hopper form to the cargo hold.
Horn cleat
A fitting, usually with two horn-shaped ends, to which lines are made fast. The classic cleat is almost anvil-shaped.
Horning
Setting the frames of a vessel square to the keel after the proper inclination to the vertical due to the declivity of the keel has been given.
Horse latitudes
The latitudes on the outer margins of the trades where the prevailing winds are light and variable.
Horsepower
A standard unit of power which is often classified in connection with engines as brake, continuous input, intermittent, output, or shaft horsepower.
Horseshoe plate
A small, light plate fitted on the counter around the rubber stock for the purpose of preventing water from backing up into the rudder trunk. Frequently it is made in two pieces.
Hounding
That portion of a mast between the deck and the hounds.
Hounds
The mast head projections which support the trestle trees and top. Also applied in vessels without trestle trees to that portion at which the hound band for attaching the shrouds is fitted.
House
To stow or secure in a safe place. A top-mast is housed by lowering it and securing it to a lowermast.
House flag
Distinguishing flag of a merchant marine company flown from the mainmast of merchant ships.
Housing
That portion of a mast below the surface of the upper deck.
Hovercraft
Vessel designed to ride on a cushion of air formed by downthrusting fans.
HP
Horse Power
HRU
Hydrostatic Release Unit
HSSC
Harmonised System of Survey and Certification
Hug
To keep close.
Hulk
A worn out vessel.
Hull
The main body or primary part providing global strength, buoyancy and hydrodynamic qualities of a vessel.
Hull down
Said of a vessel when, due to its distance on the horizon, only the masts are visible.
Hull girder
Combined hull structure contributing to the longitudinal global strength of a hull treated as analogous to a girder.
Hurricane
Force of wind over 65 knots.
Hurricane deck
Same as bridge.
HW
High Water
HWP
Hot Work Permit
Hydrofoil
High-speed craft with immersed foils for developing hydrodynamic lift at speed and a consequential reduction in resistance.
Hydrographic vessel
Vessel designed for the survey of seabed topography, currents, etc., relevant to marine navigation.
Hydroplane
Rotatable lateral fin providing vertical directional control for submersible craft.
Hydrostatic test
A pressure test employing a static head of water applied to various compartments or components of a vessel.
I
IAAP
International Air Pollution Prevention
IACS
International Association of Clasification Societies
IADC
International Association of Drilling Contractors
IAMSAR
International Aeronautical and Maritime Search and Rescue Manual
IAPH
International Association of Ports and Harbors
IATA
International Air Transport Association
IBC
Intermediate Bulk Container
I-Beam
A structural shape with cross section resembling the letter I.
IBTS
Integrated Bilge Treatment System
Ice breaker
Vessel designed for transiting sea ice or for the purpose of creating a channel in polar or winter ice for the passage of other vessels.
Ice-bound
Caught in the ice.
ICS
International Chamber of Shipping
ICSW
International Committee on Seafarers’ Welfare
Idolphin
A term applied to several piles that are bound together situated either at the corner of a pier or out in the stream and used for docking and warping vessels.
IEA
International Energy Agency
IFO
Intermediate Fuel Oil
IFSMA
International Federation of Shipmaster’s Association
IHO
International Hydro graphic Organization
IIP
International Ice Patrol
ILG
Industry Lifeboat Group
IMB
International Maritime Bureau
IMDG
International Maritime Dangerous Goods Code
IMHA
International Maritime Health Association
IMO
International Maritime O rganization
IMOSAR
IMO Search & Rescue manual
IMPA
International Marine Purchasing Association
IMSBC
International Maritime Solid Bulk Cargo Code
Inboard
Towards the center line of a ship (towards the center).
Inboard profile
A plan representing a longitudinal section through the center of the vessel, showing heights of decks, location of transverse bulkheads, assignment of various spaces and all machinery, etc., located on the center or betweenthe center and the shell on the port side.
IND
Indication
Inducement
Placing a port on a vessel’s itinerary because the volume of cargo offered by that port justifies the cost of routing the vessel.
Inert Gas
A gas such as carbon dioxide or nitrogen that is used to make an oxygen deficient atmosphere. Inerted tanks are useful for preserving cargo integrity and reducing the explosive potential of cargo tanks.
Inerted
Implies that a tank is filled with an inert gas.
INF
Irradiated Nuclear Fuel
INMARSAT
International Mar itime Satellite Organization.
Innage
A measurement of liquid cargo in a tank. It is the distance from the top of the cargo to the bottom of the tank. It is the opposite of ullage.
Inner bottom
The tank top.
Inner Shell
A plated surface or “shell” inside the outer shell plating, used as additional protection in case of collision or other accidents. The space between the inner and outer shells is often used as a storage space for liquid ballast or cargo.
Inserted packing red lead
Soaked canvas strip placed between connections that cannot be caulked successfully; stop waters.
Integrated tow
A tow of box-ended barges which, as a complete unit, is raked at the bow, boxed at the intermediate connections, and boxed or raked at the stern.
Intercostals
Plates which fit between floors to stiffen the double bottom of a ship. Intercostal comes from the Latin words inter, meaning between, and costa, meaning rib.
Intermodal
Movement of cargo containers interchangeably between trasport modes where the equipment is compatible within the multiple systems.
INTERMODAL
Carriage of a commodity by different modes of transport, i.e. sea, road, rail and air within a single journey.
Intership
the communications link between two ship stations
IOPC
International Oil Pollution Compensation
IPIECA
International Petroleum Industry Environmental Conservation Association
Irish pennant
An untidy loose end of a rope (or rags).
IRTC
International Recommended Transit Corridor
ISAN
Indigenous Shipowners Association of Nigeria
ISCC
International Ship Security Certificate
ISGOTT
International Oil Tanker & Terminal Safety Code
Isherwood system
A method of framing a vessel which employs closely spaced longitudinals, with extra heavy floors spaced further apart.
ISOA
International Stability Operations Association
ISPPC
International Sewage Pollution Prevention Certificate
ISTEC
Intertanko Technical Committee
ISWG
Intersessional Working Group on Maritime Security
ITC
International Tonnage Certificate
ITF
International Transport Federation
ITOPF
International Tanker Owners Pollution Federation
ITU
International Telecommunication Union; the international organization established to provide standardized communication procedures and practices, frequency allocations and radio regulations
IU
If Used
IUATUTC
If Used, Actual Time Used To Count
IUHATUTC
If Used, Half Actual Time Used To Count
IWL
Institute Warranty Limits
J
Jack
The flag similar to the union of the national flag.
Jack ladder
A ladder with wooden steps and side rops
Jack Tar
Sailors were once called by their first names only, and Jack was their generic name. Tar came from seamen’s custom of waterproofing clothing using tar.
Jackstaff
Flagpole at the bow of a ship.
Jacob’s ladder
A ladder of rope with rungs, used over the side.
Jam
To wedge tight.
Jetsam
Items that are thrown overboard from a vessel in distress. Discarded cargo that washes ashore.
Jettison
To throw goods overboard.
Jetty
A landing wharf or pier; a dike at a river s mouth.
Jews harp
The ring bolted to the upper end of the shank of an anchor and to which the bending shackle secures.
Jib
The arm or boom of a crane providing the reach (working radius).
Joggle
The lap a joint by keeping one edge straight and bending the other, in order to leave both surface even on one side.
Jolly Roger
A pirate’s flag carrying the skull and cross-bones.
Journal
That portion of a shaft or other revolving member shich transmits weight directly to end is in immediate contact with the bearing in which it turns.
Jumbo derrick
A derrick designed with a very high lifting capacity, often installed on heavy-lift vessels.
Jumboising
The conversion of a vessel to increase displacement by means of a mid-length transverse cut and the installation of a new section.
Jump ship
To leave a ship without authority (deserting).
Jury
A term applied to temporary structures, such as masts, rubbers, etc., used in an emergency.
Jury rig
Makeshift rig (emergency rig).
K
Keel
The lowest structural member of a ship or boat which runs the length of the vessel at the centerline and to which the frames are attached.
Keel (plate)
Lowest longitudinal strake of plating along the bottom centreline of the hull.
Keel block(s)
Support block(s) located beneath the keel strake which are employed during dry-docking of a vessel.
Keel blocks
Blocks on which the keel of a vessel rests when being built, or when she is in a drydock.
Keel bracket
A bracket, usually a triangular plate, connecting the vertical keel and flat keel plates, between the frames or floors of a ship.
Keel docking
In dry docking, the weight of a ship is carried almost entirely on the keelson provide the means of distributing the pressure on the center line and docking keels composed of doubling strips of plate or built-up girders are sometimes fitted on the bottom at a distance from the center line corresponding to the best position for the bilge block. The docking keels are fitted in a fore-and-sft direction, generally parallel or nearly so to the keel.
Keel line
An imaginary line describing the lowest portion of a vessel’s hull.
Keel rider
A plate running along the top of the floors and connecting to the vertical keel.
Keel-haul
To tie a rope about a man and, after passing the rope under the ship and bringing it up on deck on the opposite side, haul away, dragging the man down and around the keel of the vessel. As the bottom of the ship was always covered with sharp barnacles, this was a severe punishment used aboard sailing ships long ago. Today, a reprimand.
Keelson
Longitudinal vertical member above the keel to which frames are attached. (Wooden construction.)
Keep a sharp look-out
A look-out is stationed in a position to watch for danger ahead. To be on guard against sudden opposition or danger.
Kenter shackle
A detachable shackle which is used to join two forged anchor chain links together.
Kentledge
Pig iron used either as temporary weight for inclining a vessel or as permanent ballast.
Kerf
In joiner work, a slit or cut made by a saw. Kerfs are made where timber joints require adjusting. Also applied to the channel burned out by a cutting torch.
Kevel (caval)
A heavy, metal deck fitting having two horn-shaped arms projecting outward around which lines may be made fast for towing or mooring of a vessel hull.
KHZ
kHz – kilohertz (1000 Hertz)
King posts
The main center pillar posts of the ship. May be used as synonym for samson post.
King-spoke
The upper spoke of a steering wheel when the rudder is amidships, usually marked in some fashion (top spoke of neutral steering wheel).
Kink
A twist in a rope.
Knee
Outdated term for a bracket connecting a deck beam and side frame.
Knock off
To stop, especially to stop work.
Knocked down
The situation of a vessel when listed over by the wind to such an extent that she does not recover.
Knot
One nautical mile per hour (1.852 km/h, 0.5144 m/s).
Knot (rope)
A twisting, turning, tying, knitting, or entangling of ropes or parts of a rope so as to join two ropes together or make a finished end on a rope, for certain purpose.
Knuckle
Abrupt change in direction of hull surface or structure.
Knuckle line
A line on the stern of a ship, on the cant frames, which divides the upper and lower parts of the stern.!
Knuckle plate
A plate bent to form a knuckle.
Kort nozzles
A steel tube that surrounds a propeller, directing the water and improving efficiency.Kort nozzles are engineered to improve the flow around the propellers. They are similar in some ways to an airplane propeller.
KPI
Key Performance Indicator
L
Labor
A vessel is said to labor when she works heavily in a seaway (pounding, panting, hogging and sagging).
Ladder
A metal, wooden or rope stairway.
Lame duck
Term for disabled vessel that had to fall out of a convoy and thus became easy prey for submarines.
Landing
The spaced distance from the edge of a bar or plate to the center of the rivet holes.
Landing craft
Flat-bottomed shallow-draft vessel designed to beach, with a bow and/or stern ramp for the transfer of cargo/payload.
Landing edge
Opposite of sight edge, which see.
Landing ship dock
Large naval vessel capable of carrying small landing craft and amphibious vehicles, despatched via a floodable stern dock within the hull.
Landing strake
The second strake from the gunwale.
Landlubber
The seaman’s term for one who does not go to sea.
LANE METER
A method of measuring the space capacity of Ro/Ro ships whereby each unit of space (Linear Meter) is represented by an area of deck 1.0 meter in length x 2.0 meters in width.
Lanyard
A rope made fast to an article for securing it (knife lanyard, bucket lanyard, etc.), or for setting up rigging.
Lap
A term applied to the distance that one pieces is laid over the other in making a lap joint.
Lapstrake
Applied to boats built on the clinker system, in which the starkes overlap each other. The top strake always laps on the outside of the strake underneath.
LASH
Abbreviaton for “lighter aboard ship”. A specially constructed vessel equipped with an overhead traveling gantry crane for lifting specially designed barges out of water and stowing them into the cellular holds of the vessel as well.
LASH (1)
To hold goods in position by use of Ropes, Wires, Chains or Straps etc.
LASH (2)
Lighter Aboard Ship a vessel that loads small barges direct from the water
Lashing
A passing and repassing of a rope so as to confine or fasten together two or more objects; usuafly in the form of a bunch.
LAT
Latitude
Launch
To place in the water.
Lay aloft
The order to go aloft (go up above).
Laying out
Placing the necessary instructions on plates, shapes, etc., for planing, shearing, punching, bending, flanging, beveling, rolling, etc., from the templates made in the mold loft or taken from the ship.
Lazaretto
A low headroom space below decks used for provisions or spare parts, or miscellaneous storage.
Lazy guy
A light rope or trackle by which a boom is prevented from swinging around.
LDL
Limiting Danger Line
Lee shore
The land to the leeward of the vessel (wind blows from the ship to the land).
Leeward
The direction away from the wind.
LEG
Legal Committee
Length between perpendiculars
The length of a ship measures from the forward side of stem to the aft side of the stern post at the height of the designed water line.
Length over all
The length of a ship measured from the foremost point of the stem to the aftermost part of the stern.
Liberty
Permission to be absent from the ship for a short period (authorized absence).
Lifeboat
Rigid-hulled survival craft deployed from a parent vessel.
Life-line
A line secured along the deck to lay hold of in heavy weather; a line thrown on board a wreck by life-saving crew; a knotted line secured to the span between life-boat davits for the use of the crew when hoisting and lowering.
Lift a template
Is to construct a template to the same size and shape as the part of the ship involved. To lay aot a template is to transfer the size and shape into the material and work it into the fabricated object.
Lifting
Transferring marks and measurements from a drwing, model, etc., to a plate or other object, by templates or other means.
Lifting gear
The lifting equipment (i.e., cranes) for loading and discharging operations.
Light load line
The water line when the ship rides empty.
Light, fixed
A thick glass, usually circular in shape, fitted in a frame fixed in an opening in a ship’s side, deck house, or bulkhead to provide access for light. The fixed light is not hinged.
Lightening hole
Large hole cut in a structural member to reduce its weight.
Lighter
A full-bodied, heavily built craft, usually not self-propelled, used in bringingmarchandise or cargo alongside or in transferring same from a vessel.
Lightship
The vessel condition without any form of deadweight aboard (incl.fuel and ballast).
Limber chains
Chains passing through the limber holes of a vessel, by which they may be cleared of dirt.
Limber hole
Small hole or slot cut in a structural member to permit the drainage of liquid.
Limber holes
Holes in the bottoms of floors throught which bilge water runs through tank sections to a seepage basin, where it is then pumped out. The row of holes constitutes the limber passage.
Limber strake
The strake on the inner skin of a vessel which is nearest to the keel.
Line
A general term for light rope.
Line haul
The movement of freight over the tracks of a transportation line from one location (port or city) to another.
Liner
Vessel (over 1000 grt) operating on a regular route between ports according to a particular schedule.
Lines
The ropes or cables used on a vessel for towing, mooring, or lashing.
Lines plan
Plans indicating the hull form via the inclusion of waterlines, buttock lines and section lines shown on profile, plan and end views.
List
To learn to one side.
LL
Load Line
LMAA
London Maritime Arbitrators Association
LNG
Liquefied Natural Gas
LNG carrier
Vessel designed to transport natural gas in liquefied form.
LOA
Length Overall of the vessel
Load eater line
The water line when the ship is loaded.
Load line markings
Markings on the ship’s side defi ning the minimum freeboard allowable in different ocean areas and different seasons of the year. Also known as Plimsol mark.
Locker
A storage compartment in a ship.
Loftsman
A man who lays out the ship’s lines in the mold loft and makes the molds or templates therefrom.
Log book
A continuous operating record of a ship kept by one of its officers. In it are recorded daily all important events occurring on board, also the condition of the weather, the ship’s position and other data.
Loll
A ship which is slightly unstable in the vertical position will heel until the GZ curve becomes zero. It is said to loll and the angle it takes up is the angle of loll.
Lo-lo (lift on-lift-off)
Cargo handling method by which vessels are loaded or unloaded by either ship or shore cranes.
Longitudinal
A line in the fore and aft direction parallel to the centreline. Also refers to a longitudinal stiffener running parallel (or nearly parallel) to the centreline.
Longitudinal bulkhead
A partition wall of planking or plating running in a fore-and-aft direction. Oil tankers are required to have at least one fore-and-aft bulkhead in the cargo oil space. Fore-and-aft bulkheads are very common on warships.
Longitudinal centre of buoyancy (LCB)
The fore and aft location of the centre of buoyancy.
Longitudinal centre of gravity (LCG)
The fore and aft location of the centre of gravity.
Longitudinal stability
The stability of a ship for rotation (trim) about a transverse axis.
Longshoreman
A laborer who works at loading and discharging cargo.
Lookout
The man stationed aloft or in the bows for observing and reporting objects seen.
Loom
The part of an oar between the blade and handle. The reflection of a light below the horizon due to certain atmospheric conditions.
Loose
To unfurl.
LOP
Lines of Position
Louver
A small opening to permit the passage of air for the purpose or ventilation, which may by partially or completely closedby the operation of overlapping shutters.
LOW
Last Open Water
LPG
Liquefied Petroleum Gas
LPG carrier
Vessel designed to transport petroleum gas in a form of butane or propane.
LRIT
Long Range Identification & Tracking of Ships
LS (or LUMPS)
Lumpsum
LSA
Life Saving Appliances
LSD
Lashed Secured Dunnaged
LT
Liner Terms
LTI
Lost Time Injury
LTIF
Loss Time Injury Frequency
Lubber line
The black line parallel with ship’s keel marked on the inner surface of the bowl of a compass, indicating the compass direction of the ship’s head.
Lug pad
A projection on deck with hole for fastening a block for a lead.
Lurch
The sudden heave of the ship.
LW
Low Water
LWC
Lost Workday Case
LYCN
Laycan (Layday Canceling Date)
Lyle gun
A gun used in the life-saving services to throw a life line to a ship in distress or from ship to shore and used when a boat cannot be launched.
M
M/V
Motor Vessel
Machinery
Term covering main engines, auxiliary engine room machinery(e.g.,pumps, compressors, etc.,) in addition to other installed plant (e.g., hydraulics, air-conditioning plant, lift machinery, etc.,) and deck machinery (e.g., mooring winches, windlasses, etc.).
Madeye
A steel fitting formed by a flat doubler plate and vertical steel member containing a circular opening.
Magazine
Internal space dedicated to the storage of munitions (shells, surface-to-air missiles, etc.) in a naval vessel.
MAIB
Marine Accident Investigation Branch
Main beam
The main longitudinal beam on a ship, running down the center line and supports as a rule by king posts. Sometimes there are two main beams, on each side of the center line.
Main body
The hull exclusive of all deck erections spars, streaks, etc., the naked hull.
Main breadth line
The greatest width of a ship amidships. If a ship’s sides tumble home, the main breesth line will be considerably below the bulwarks.
Main deck
The main continuous deck or principal deck of a vessel
Main mast
The principal mast of a vessel.
Make colors
Hoisting the ensign at 8 a.m. and down at sunset.
Make the course good
Steering; keeping the ship on the course given (no lazy steering).
Make the land
Landfall. To reach shore.
Make water
To leak; take in water.
Malacca-max
Maximum size of container and bulk vessels (in terms of draught) that can cross the Malacca Straits. The Malacca-max reference is believed to be today the absolute maximum possible size for future container vessels (approximately 18,000 TEU).
Man ropes
Ropes hung and used for assistance in ascending and descending.
Manger
The perforated. Elevated bottom of the chain locker which prevents the chains from touching the main locker bottom, and allows see page water to flow to the drains.
Manhole
A hole in a tank, boiler or compartment on a ship, designed to allow the entraned of a man for examination, cleaning and repairs.
Manhole cover
A cover which seals a manhole and is usually designed to lock in place by twisting or using a centerbolt, studbolts, or dogs.
Manifold
A casting or chest containing several valves. Suction or discharge pipes from or to the various compartments, tanks, and pumps are led to it, making it possible for several pumps to draw from or deliver to a given place through one pipe line.
Manila
Rope made from the fibers of the abaca plant.
Margin plate
A longitudinal plate whick closes off the ends of the floors along the widship section
Maritime Mobile Service
The radio telecommunications service used by all vessels internationally.
Maritime Mobile Service Identity (MMSI)
MMSI is a nine-digit number, similar to a cell phone number, that identifies your vessel or boat. It’s programmed into your digital maritime radio, and used to contact other vessels directly, such as boats, and may also send a signal for help in an emergency.
Marlinspike
Pointed iron implement used in separating the strands of rope in splicing, marling, etc.
Maroon
To put a person ashore with no means of returning.
Marry
To join two ropes ends so that the joint will run through a block, also to place two ropes alongside each other so that both may be hauled on at the same time.
Mast
A spar or hollow steel pipe tapering smaller at the top, placed on the center line of the ship with a slight after rake. Masts support the yards and gaffs. On cargo vessels they support cargo booms.
Mast hole
A hole in the deck ti receive a mast. The diameter of the hole is larger than the mast for the purpose of receiving two rows of founded wedges to hole the mast in place.
Mast step
The frame on the keelson of boat (does not apply on ships) to which the heel of a mast is fitted.
Mast table
A structure built up around a mast as a support for the cargo boom pivots.
Master
A term for the captain, a holdover from the days when the captain was literally, and legally, the “master” of the ship and crew. His word was law.
Masthead
The top part of the mast.
Masthead light
The white running light carried by steam vessel underway on the foremast or in the forepart of the vessel.
Mats
Slabs, usually constructed of timbers, which are placed on the deck of a vessel for the purpose of supporting and distributing the weight of heavy loads. back
Mayday
The signal used to signify a Distress situation is in effect.
Mayday Relay
The signal used by a station to relay a Distress call and message from the station in distress.
MB
Merchant Broker
MBL
Minimum Breaking Load
MBM
Multi-Buoy Moorings
MCA
Maritime Coastguard Agency (United Kingdom)
MDO (DO)
Marine Diesel Oil
Medium Frequency (MF)
Radio fFrequency in the range of 300 kHz – 3000 kHz. Part of this band is the medium wave (MW) AM broadcast band. The MF band is also known as the hectometer band as the wavelengths range from ten to one hectometer (1000 to 100 m).
MEPC
Maritime Environment Pollution Comittee
MERSAR
Merchant Ship Search & Rescue Manual
Mess gear
Equipment used for serving meals.
Messenger
A light line used for hauling over a heavier rope or cable.
Messman
A member of the steward’s department who served meals to officers and crew.
Messroom
A space or compartment where members of the crew eat their meals, a dining room in which officers eat their neals is called a wardroom messroom.
Metacentre
The intersection of successive vertical lines through the centre of buoyancy as a ship is heeled progressively. For small inclinations the metacentre is on the centreline of the ship.
Metacentric diagram
A plot showing how the metacentre and centre of buoyancy change as draught increases.
Metacentric height (GM)
The vertical separation of the metacentre and the centre of gravity as projected on to a transverse plane.
Mezzamine financing
A mix of financing instruments, including equity, subordinated debt, completion guarantees, and bridge financing, the balance of which changes as the risk profile of a project changes (that is, as a project moves beyond construction into operation).
MFAG
Medical First Aid Guide
MHz
Megahertz (1000 kHz)
Microphone
the apparatus attached to the radio which converts sound waves to electrical impulses and into which the operator speaks
Middle body
That part of a ship adjacent to the midship section. When it has a uniform cross section throughout its length, with its water lines parellel to the center line, it is called the parellel middle body.
Midship
The middle of the vessel.
Midship area coefficient (CM)
One of the coefficients of fineness. It is the ratio of the underwater area of the midship section to that of the circumscribing rectangle.
Midship beam
The longest beam transverse or longitudinal of the midship of a vessel.
Midship frame
The frame at midship, which is the largest on the vessel.
Midship section
Fully dimensioned sectional drawing of both hull and superstructure principal structural members at the midships station.
MIN/MAX
Minimum/Maximum (cargo quantity)
MIO
Marine Information Object
MMSI
Maritime Mobile Service Identity
MNLO
Merchant Navy Liaison Officer
MOB
Man Overboard
MOC
Management Of Change
MODU
Mobile Offshore Drilling Unit
MOLCHOPT
More or Less Charterers Option
Mold
A pattern or template. Also a shape of metal or wood over or in which an object may be hammered or pressed to fit.
Mold loft
The large enclosed floor wher the lines of a vessel are laid out and the molds or templates made.
Molded breadth
The greatest breadth of a vessel, measured from the heel of frame onone side to heel of frame on the other side.
Molded depth
The extreme height of a vessel amidships, from the top of the keel to the top of the upper deck beam.
Molded line
A datum line from which is determined the exact location of the various parts of a ship. It may be horizontal and straight as the molded base line, or curved as a molded deck line or a molded frame line. These lines are determined in the design of a vessel and adhered to throughtout the construction. Molded lines are those laid down in the mold loft.
Molding edge
The edge of a ship’s frame which comes in contact with the skin , and is represented in the drawings.
Mole
A breakwater used as a landing pier.
MOLOO
More or Less Owners Option
Monkey fist
A knot worked into the end of a heaving line (for weight).
Monkey island
A flying bridge on top of a pilothouse or chart house.
Monkey tail
A curved bar fitted ti the upper, after end of a rubber, and used as an attachment for the rubber pendants.
Mooring
Securing to a dock or to a buoy, or anchoring with two anchors.
Mooring line
Cable or hawse lines used to tie up a ship.
Mooring pipe
An opening through which hawse lines pass.
Mortise
A hole cut in any material to receive the end or return of anoter piece.
Mother Carey’s chickens
Small birds that foretell bad weather and bad luck.
Moulded breadth
Greatest breadth of a hull measured between inner surfaces of the side shell plating.
Mousing
Small stuff seized across a hook to prevent it from unshipping (once hooked, mousing keeps the hook on).
MSC
Maritime Safety Committee
MSDS
Material Safety Data Sheet
MSI
Maritime Safety Information
MSL
Maximum Securing Load
MT
Metric Ton (i.e. 1,000 kilos / 2204.6lbs)
MTC
Medical Treatment Case
MTOTS
Marine Terminal Operators Training System
MTSC
Marine Technical Sub-Committee
Mud scow
A large, flat bottomed boat used to carry the mud from a dredge.
Mullion
The vertical bar dividing the lights in a window.
Mushroom anchor
An anchor without stock and shaped like a mushroom.
N
NAABSA
Not Always Afloat But Safely Aground
Nantucket sleigh ride
A term for what frequently happened to Nantucket whalers when they left the whaling ship in a small boat to go after a whale. If they harpooned the whale without mortally wounding it, the animal took off with the whaleboat in tow.
NARSUC
Navigation and Routeing Sub-Committee
National Oceanic and Atmospheric Administration (NOAA)
NOAA is an American scientific and regulatory agency within the United States Department of Commerce that forecasts weather, monitors oceanic and atmospheric conditions, charts the seas, conducts deep sea exploration, and manages fishing and protection of marine mammals and endangered species in the U.S. exclusive economic zone.
Nautical mile
Unit of distance used in marine navigation. (International nautical mile = 1.852 km. 6076.12 ft, 1.1508 land miles.) The international nautical mile is equivalent to the average linear distance over 1 minute of latitude arc at 45° latitude at sea level.
Nautical Mile (NM)
The international nautical mile is defined as exactly 1852 metres (6076 ft; 1.151 mi). The derived unit of speed is the knot – one nautical mile per hour. nm is a non-standard abbreviation used in many maritime applications and texts, including US Government Coast Pilots and Sailing Directions. M is used as the abbreviation for the nautical mile by the International Hydrographic Organization.
NAVTEX
A radio system operating on 518 kHz and 490 kHz designed to distribute maritime safety information, navigation and weather warnings, and emergency alerts in text format.
NCB
National Cargo Bureau
NCEC
National Chemical Emergency Centre
NCMM
Norwegian Centre for Maritime Medicine
NDA
Non Discharge Area
Neobulk cargo
Non-, or economically not feasible, containerizable cargo such as timber, steel, and vehicles.
Neptune
The mythical god of the sea.
NESTING
Implies that cargo is presented stacked in the contour of similarly shaped cargo, it may be likened to a stack of plates.
Net registered tonnage
A formula-derived measure of the internal (enclosed) volume in a vessel except spaces for machinery, navigation and accommodation. Net tonnage is always less than the gross tonnage.
Net tonnage
The cubical space available for carrying cargo and passengers.
Netting
A rope network.
NIS
Non Indigenous Species
NLS
Noxious Liquid Substances
NON-REVERSIBLE
(Detention). If loading completed sooner than expected, then saved days will not be added to discharge time allowed.
Nonvessel operating common carrier (NVOCC)
A cargo consolidator in ocean trades who buys space from a carrier and resells it to smaller shippers. The NVOCC issues bills of lading, publishes tariffs, and otherwise conducts itself as an ocean common carrier, except that it does not provide the actual ocean or intermodal service.
Non-watertight door
A term applied to a door that is not constructed to prevent water under pressure from passing through.
NOR
Notice of Readiness
Not under command
Said of a vessel when unable to maneuver.
Not under control
Same as not under command.
NPDES
National Pollutant Discharge Elimination System
NPRM
Notice of Proposed Rule Making
NRT
Net Registered Tonnage
NTVRP
Non Tank Vessel Response Plan
NUC
Not Under Command
NYPE
New York Produce Exchange
O
Oakum
Material used for caulking the seams of vessels and made from the loose fibers of old hemp rope.
OBO (Oil-bulk ore (carrier))
Vessel designed for the transportation of oil and/or bulk ores.
OBQ
On Board Quantity
OBS
Observation
OCIMF
Oil Company International Marine Forum
OCM
Oil Content Monitor
ODMCS
Oil Discharge Monitoring & Control Systems
ODME
Oil Discharge Monitoring Equipment
ODS
Ozone Depleting Substances
OEL
Occupational Exposure Limit
OFAC
Office of Foreign Assets Control
Off and on
Standing toward the land and off again alternately.
Officer of the watch
The officer in charge of the watch.
Offsets
Are given in feet, inches and eights of an inch. They are taken from large body plans and given the horizontal distance from the center line to the molded frame line on each of the water lines, which are usually spaced 2′-0” apart. Offsets also give the height of each buttock above the baseline at each frame< the heights of decks from the base line, the location of longitudinals and stringers by half breadths and heights, or heights above the base line intersecting the molded frame lines, and all dimensions such that the entire molded form of a ship and the location of all membersof the structure are definitely fixed.
OFG
Offshore Floating Group
Ogee
A molding with a concave and convex outline like an S.
OHG
Offshore Hose Guidelines
OIC
Officer in Charge
Oil bag
A bag filled with oil and triced over the side for making a slick in a rough sea (to keep seas from breaking).
Oil tanker
Vessel designed for the transportation of liquid hydrocarbons in bulk.
Oilskin
Waterproof clothing.
Oiltight
Having the property of resisting the passage of oil.
Oiltight bulkhead
A partition of plating reinforced where necessary with stiffering bars and capable of preventing the flow of oil under pressure from one compartment to another. The riveting must be closer spaced than in watertight work and special care must be taken with the calking.
Old man
A piece of heavy bar iron bent to the form of a Z. One leg of the Z is bolted to the material that is to be drilled, and the drill top placed under the other leg and adjusted so the “old man” holds the drill against the material.
OMC
Offshore Marine Committee
OMOG
Offshore Maritime Operations Group
On board
On or in a ship.
On deck
On the upper deck, in the open air.
On report
In trouble.
On soundings
Said of a vessel when the depth of water can be measured by the lead (within the 100 fathom curve).
ONI
Office of Naval Initiative
OO
Owners Option
OPA
Oil Pollution Act
OPRC
Oil Pollution Preparedness, Response and Cooperation
Ordinary seaman
The beginning grade for members of the deck department. The next step is able bodied seaman.
Orlop deck
The lowest deck in a ship.
ORS
Open Reporting System
OSH
Open Shelter Deck
OTF
Offshore Terminal Forum
Out of trim
Not properly trimmed or ballasted (not on even keel; listing).
Outboard
In a direction towards the side of the ship.
Outboard profile
A plan representing the longitudinal exterior of a vessel, showing the starboard side of the shell, all deck erections, masts, yards, rigging, rails, etc.
Over-all
The extreme deck fore and aft measurement of a vessel.
Overboard
Outside, over the side of a ship into the water.
Overcarriage
The carriage of cargo beyond the port for which it was intended.
Overhang
Same as counter
Overhaul
Get gear in condition for use; to separate the blocks of a tackle to lengthen the fall (ready for use again).
Overtaking
Said of a vessel when she is passing or overtaking another vessel.
OVID
Offshore Vessel Inspection Database
OVIQ
Offshore Vessel Inspection Questionnaire
OVMSA
Offshore Vessel Management and Self Assessment
OWS
Oil Water Separator
Oxidation
The combination of a substance or element like wood, iron, gasoline, etc, with oxygen. The process is fundamentally the same whether wood is consumed with fire or iron is turned into rust (iron oxide). In welding the oxygen of the air forms an oxide with the molten metal, thus injuring the quality and strength of the weld.
Oxter plate
The name of a plate that fits in the curve at the meeting of the shell plating with the top of the stern post and which is fastened there to.
P
Packers
Men who fit lamp wicking, tarred felt or other material between parts of the structure to insure water or oil tightness.
Pad eye
A fitting having an eye integral with a plate or base in order to distribute the strain over a greater area and to provide ample means of securing. The pad may have either a “worked” or a “shackle” eye, or more than one of either or both. The principal use of such a fitting is that is affords means for attaching rigging, stoppers, mlocks, and other movable or portable objects. Pas eyes are also known as lug pads.
Painter
A short piece of rope secured in the bow of a small boat used for making her fast.
Painting beams
The transverse beams that tie the painting frames together.
Painting frames
The frames in the fore peak, usually extra heavy to withstand the panting action of the shell plating.
Pair masts
A pair of cargo masts stepped on eith side of the center line, with their heads connected by spans.
Pale
One of the interior shores for steadying the neams of a ship while building.
Pallet
A flat wooden or plastic platform onto which cargo may be strapped or lashed which simplifies handling via cranes and forklift vehicles.
Pallet carrier
Cargo vessel specially designed or adapted for the transportation of pallet-borne cargoes.
Palm and needle
A seaman’s sewing outfit for heavy work.
Pan Pan
The signal used to signify an Urgency situation and that the station is about to transmit a message concerning the safety of a vessel, aircraft, vehicle or person.
Panamax Market
category of vessels notionally at the dimensional limits for transiting the Panama canal.
Panting
The pulsation in and out of the bow and stern plating as the ship alternately rises and plunges deep into the water.
Panting stringer
Horizontal deep-web side structural member used for strengthening bow structure prone to panting loads.
Parallel midbody
Midship portion of a hull within which the longitudinal contour is unchanged.
Paravane
A water plane with a protecting wing placed on bottom forward end of the keel stem. Also a special type of waterkite which, when towed wth wire rope from a fitting on the forefoot of a vessel, operates to ride out from the ship’s side and deflect mines which are moored in the ppath of the vesse;, and to cut them adrift so that they will rise to the surface where they may be seen and destroyed.
PARS
Piracy Attack Risk Surface
Part
To break.
Partial bulkhead
A term applied to a bulkhead that extends only a portion of the way across a compartment. They are generally erected as strength members of the structure.
Partners
Similar pieces of steel plate, angles or wood timbers used to strengthen and support the mast where it passes through a deck, or placed between deck beams under machinery bed plates for added support.
Pass a line
To reeve and secure a line.
Pass a stopper
To reeve and secure a stopper (hold a strain on a line while transferring it).
Pass down the line
Relay to all others in order (a signal repeated from one ship to the next astern in column).
Pass the word
To repeat an order for information to the crew.
Passenger vessel
A vessel which carries more than 12 passengers.
PASTUS
Past Us
Pay
To fill the seams of a vessel with pitch.
Pay off
To turn the bow away from the wind; to pay the crew.
Pay out
To slack out a line made fast on board (let it out slowly).
Paying
Paying out, slackening away on a rope or chain. Also the operation of filling seams between planks after calking, with melted pitch or marine glue, etc.
PC
Period of Charter
PCASP
Privately Contracted Armed Security Personnel
PCGO
Part Cargo
PCT
Percent
PDCA
Plan Do Check Act
PDPR
Per Day Pro Rata
Peak
See Fore Peak and after Peak.
Peak tank
Tank in the forward and after ends of a vessel. The principal use of peak tanks is in trimming The ship. Their ballast is varied to meet required changes in trim. Should the after hold be empty, the vessel would ride so high that the propeller would lie half out of water and lose much of its efficiency. Filling the afer peak tank forces the propeller deeper into the water.
Peen
To round off or shaoe an object, smoothing out burrs and rough edges. (Nown) The lesser head of a hammer. It is termed ball when it is spherical, cross when in the form of a rounded edge ridges at right angles to the axis of the handle, and sraight when like a ridge in the plane of the handle.
Pelican hook
A hinged hook held closed by a ring and used to provide the quick release of an object which it holds.
Pendant
A length of rope, usually having a thimble or block spliced into the lower end for hooking on a tackle.
PER
Period
PERDIEM
Per Diem By the Day
Permanent ballast
Ballast material (usually solid material) which cannot be discharged or transferred by pump or by other means and which is used for attaining design draft and trim.
Permanent dunnage
Strips of timber fixed to the frames of a ship to keep cargo away from the sides of the ship to avoid damage and condensation.
Perpendicular, after
A line perpendicular to the keel line, drawn tangent to the after contour of the stern.
PFG
Piracy Focus Group
Phonetic Alphabet
The international method of word spelling to be used when communications may be difficult.
PHPD
Per Hatch Per Day
Pier head jump
Making a ship just as it is about to sail.
Pile
A pointed spar driven into the bottom and projecting above the water; when driven at the corners of a dock, they are termed fender piles.
Pilferage
Stealing of cargo.
Pillar
Vertical column used to provide support to overhead deck structure.
Pillars
Vertical columns supporting the decks. Also called stanchions.
Pilot boat
A power or sailing boat used by pilots (men who have local knowledge of navigation hazards of ports).
Pilot house
A house designed for navigational purpose. It is usually located forward of the midship section and so constructed as to command an unobstructed view in all directions except directly aft along the center line of the vessel, where the smokestack usually interferes.
Pilot rudder
A small rudder fastened to the after part of the regular rudder, which by a mechanical attachment pulls the main rudder to either side.
Pin
The metal axle of a block upon which the sheave revolves.
Pintle
A metal pin secured to the rubber, which is hooked downwardinto the qudgeons on the stern post, and affords an axis of oscillation as the rubber is moved from side to side for steering.
Pipe layer
Vessel designed for the laying of pipelines on the sea bed.
Pipe stanchion
A steel deck fitting consisting of a vertical post with angled bracket(s) on one side, welded to a doubler plate, which is welded on the deck of a vessel to restrain the movement of cargo, such as pipe.
Pitch
A tar substance obtained from the pine tree and used in paying the seams of a vessel. Motion of vessel.
Pitching
The oscillatory vertical motion of a vessel forward and aft in a seaway.
Pitting
Areas of corrosion.
Plait
To braid; used with small stuff.
Plan
A drawing prepared for use in building a ship.
Planking
Broad planks used to cover a wooden vessel’s sides, or covering the deck beams.
Plate, furnaced
A plate that requires heating in order to shape it as required.
Platform
A partial deck.
Platform deck
Deck which does not contribute to the overall longitudinal strength of a vessel.
Plating
The steel plates which form the shell or skin of a vessel.
Play
Freedom of movement.
PLEM
Pipeline End Manifold
Plimsoll mark
The primary loadline mark which is a circle intersected by a horizontal line accompanied by letters indicating the authority under which the loadline is assigned.
Plug
A wooden wedge fitting into a drainage hole in the bottom of a boat for the purpose of draining the boat when she is out of water.
Plummer blocks
Supports for a shaft (such as the propeller shaft).
Plunging
A ship is said to plunge when it sinks bow or stern first through loss of longitudinal stability.
PMSC
Private Maritime Security Contractor
POEA
Philippine Overseas Employment Administration
Point
To taper the end of a rope; one of the 32 divisions of the compass card. To head close to the wind.
Polarity
The property possessed by electrified bodies by which they exert opposite forces in opposite directions. The current in an electrical circuit passes from the positive to the negative pole. In welding, more heat is generated on the positive pole than on the negative one, so that the welding rod is generally made the negative electrode.
Pontoon
Flat-bottomed floating structure with a shallow draught.
Pooling
Sharing of cargo or the profit or loss from freight by member lines of a liner conference.
Poop
The structure or raised deck at the after end of a vessel.
Poop deck
A partial deck at the stern above the main deck, derived from the Latin “puppio” for the sacred deck where the “pupi” or doll images of the deities were kept.
Pooped
An opening in a ship’s side, such as an air port, or cargo port.
Poppets
Those pieces of timber which are fixed perpendicularly between the ship’s bottom and the bilgeways at the foremost and aftermost parts of the ship, to support her in launching.
Port
(1) Pertaining to the left-hand side of a vessel. (2) Term used for small windows in the marine context.
Port gangway
An opening in the side plating, planking, or bulwark for the purpose of providing access through ehich people may board or leave the ship or through which cargo may be handled.
Port hole
An opening in the ship’s shell plating.
Port lid
A shutter for closing a port hole in stormy weather. It is hung by top hinges.
Port of Registry
Port in the country under whose flag a vessel is legally registered.
Port side
The left hand side of the ship looking forward.
Port State Control
The examination of vessels for compliance with IMO Conventions and resolutions by state authorities.
Position
the location of the vessel with reference to land positions, aids to navigation, etc.
Pouring oil on troubled waters
Heavy-weather practice of pouring oil on the sea so as to form a film on the surface, thus preventing the seas from breaking. To smooth out some difficulty.
PPD
Permanent Partial Disability
PPE
Personal Protective Equipmeny
Pratique
A permit by the port doctor for an incoming vessel, being clear of contagious disease, to have the liberty of the port.
PRATIQUE
License or permission to use a port
Preentry
Presentation to the customs authorities of export or import declarations prior to the clearance of goods.
Preventer
A rope used for additional support or for additional securing, e.g., preventer stay.
Prick punch
A small hand punch used to make a very small indentation or prick in a piece of metal.
Pricker
Small marlinespike.
Priority
the order in which radio communications may proceed
Privileged vessel
One which has the right of way.
Procedure
the order and the precise method of conducting radio communications according to ITU regulations
Product tanker
Tanker designed for the transportation of a variety of hydrocarbon and chemical liquids with elaborate pumping and safety systems.
Prolonged blast
A blast of from 4 to 6 seconds’ duration.
Propeller
A propulsive device consisting of a boss or hub carrying radial blades, from two to four in number. The rear or driving faces of the blades form portions of an approximately helical surface, the axis of which as the center line of the propeller shaft.
Propeller arch
The arched section of the hull above the propeller.
Prow
The part of the bow from the load water line to the top of he bow.
PSI
Pounds Per Square Inch
PSIG
Pounds Per Square Inch Gauge
PSR
Perils at Sea Revision
PTC
Ports & Termincal Committee
PTD
Permanent Total Disability
Pull-out manoeuvre
A manoeuvre used to demonstrate the directional stability of a ship.
Pump dale
A pipe to convey water from the pump discharge through the ship’s side.
Punch, center
A small punch used to indent a piece of metal for centering a drill.
Punt
A rectangular flat- bottomed boat used by vessels for painting the ship’s side and general use around the ship’s water line, fitted with oar-locks on each side and usually propelled by sculling.
Purchase
A tackle (blocks and falls).
Pusher tug
Tug designed for or engaged in pushing barges from behind.
Put to sea
To leave port.
PV valve
Pressure vacuum relief valve; a valve which automatically regulates the pressure or vacuum in a tank.
PWSA
Ports and Waterways Safety Act
Q
QHSE
Quality, Health, Safety & Environment
Quadrant
A fitting on the rubber head to which the steering chains are attached.
Quarantine
Restricted or prohibited intercourse due to contagious disease.
Quarter
That portion of a vessel’s side near the stern.
Quarter deck
A term applied to the after portion of a weather deck. In a warship that portion allotted to the use of the officers.
Quartering sea
A sea on the quarter (coming from a side of the stern).
Quarters
Living spaces for passengers or personnel. It includes staterooms, dining salons, mess rooms, lounging places, passages connected with the foregoing, etc., individual stations for personnel for fire or boat drill, etc.
Quarters bill
A vessel’s station bill showing duties of crew.
Quay
An artificial wall or bank, usually of stone, made toward the sea at the side of a harbor or river for convenience in loading and unloading vessels.
R
Rabbet
A depression or offset designed to take some other adjoining part, as for example the rabbet in the stem taking the shell plating.
Radar
a device for finding range and direction by ultra-high radio frequencies which reflect back to their source and display the position of the reflected object
Radio Operator
The person certified and authorized to transmit and receive radio communications.
Radio Silence
While a Distress situation is in progress, all stations must maintain radio silence, unless they are involved in Distress traffic.
Radiotelephone (Radio)
A type of electronic equipment that transmits and receives the radio waves involved in radio voice communications.
Radiotelephone Alarm
The signal transmitted to alert stations that a Distress call and message are to follow.
Rail
The upper edge of the bulwarks.
Railing(s)
Horizontal parallel tubing forming a safety barrier at edges of decks.
Rail-mounted gantry (RMG) or rail-mounted container gantry crane
Rail-mounted gantry crane used for container acceptance, delivery, and stacking operations in a container yard.
Rake
The forward pitch of the stem. The backwark slope of the stern.
RAM
Risk Assessment Matrix
Ram bow
A bow protruding undernearth the water line considerable forward of the fore-castle deck.
Ramp
Hinged platform permitting the loading/discharge of vehicles or movement between decks of vehicles aboard Ro-Ro vessels.
Range
The maximum distance a vessel is capable of attaining at its normal
Range, galley
The stove situated in the galley which is used to cook the food. The heat may be generated by coal, fuel oil, or electricity.
Ratline
A short length of small rope “ratline stuff” running horizontally across shrouds, for a ladder step.
RCDS
Raster Chart Display System
RCM-SAR
Royal Canadian Marine Search and Rescue (only in B.C.).
RCVR
Receivers
Reach
The horizontal distance that a crane or lifting appliance can cover, measured from its axis of rotation.
Reachrod
A steel rod which connects an above deck valve handle to a below deck valve.
Reaming
Enlarging a hole by the means of revolving in it a cylindrical slightly tapered tool with cutting edges running along its sides.
RECAAP
Regional Cooperation Agreement of Combating Piracy & Armed Robbery Against Ships in Asia
Reef
To reduce the area of a sail by making fast the reef points (used in rough weather).
Reefer
Refrigerated container or vessel designed to transport refrigaeated or frozen cargo.
Reeve
To pass the end of a rope through any lead such as a sheave or fair lead.
Refrigerated vessel
Vessel designed for the transportation of refrigerated perishable
Registry
The ship’s certificate determining the ownership and nationality of the vessel. Relieving tackle. A tackle of double and single blocks rove with an endless line and used to relieve the strain on the steering engine in heavy weather or emergency.
Regulation by Reference (RBR)
Spectrum Management publications covering radio regulations.
Relay
To transfer containers from one ship to another.
Relief
Any clearance allowed back of the cutting edge to reduce friction whether on top, bottom or wall of the tread.
Rescue Coordination Centre (RCC)
RCC is a primary search and rescue facility in a country that is staffed by supervisory personnel and equipped for co-ordinating and controlling search and rescue operations. RCCs are responsible for a geographic area, known as a “search and rescue region of responsibility” (SRR). RCCs are operated unilaterally by personnel of a single military service (e.g. an air force, or a navy) or a single civilian service (e.g. a national police force, or a coast guard).
Research vessel
Vessel designed for oceanographic or fisheries research.
Reserve buoyancy
Watertight volume of a vessel above the waterline.
Reverse frame
An angle bar placed with its heel against another angle additional strength. The flanges of deck stiffeners always bace outboard.
REVERSIBLE (Detention)
If loading completed sooner than expected at load port, then days saved can be added to discharge operations.
RIB
Rigid inflatable boat.
Ribband
A longitudinal strtip of timber following the curvature of a vessel and bolted to its ribs to hold them in position and give stability to the skeleton while building.
Ride
To lie at anchor; to ride out; to safely weather a storm whether at anchor or underway.
Ride control
System(s) employing active hydrodynamic foils or deflectors installed to vary the attitude and vertical motions of the hull in high-speed vessels.
Rider frame
Any frame riveted or welded on another frame for the purpose of stiffening it.
Rider plates
Bed plates set on top of the center keelson, if fitted, for the pillars to rest on.
Rig
A general description of a vessel’s upper works; to fit out.
Rigging
A term used collectively for all the ropes and chains employed to support the masts, yards, and booms of a vessel, and to operate the movable parts of same.
Right
To return to a normal position, as a vessel righting after heeling over.
Ringbolt
A bolt fitted with a ring through its eye, used for securing, running, rigging, etc.
RIO
Radar Information Overlay
Rips
A disturbance of surface water by conflicting current or by winds.
Rise and shine
A call to turn out of bunks.
Rise of bottom
See Deadrise.
Rising floors
The floor frames which rise fore and aft above the level of themidship floors.
Rivet
A metal pin used for connecting two or more pieces of material by inserting it into holes punched or drilled in the pieces. The end that bears a finished shape is called the head and the end upon which some oretation is performed after its insertion is called the point. Small rivets are “driven cold”, i.e. without heating, and large ones are heated so that points may be formed by hammering.
Rivet spacing
A term applied to the distance between the centers in a row of rivets. This distance usually consists of a multiple of the rivet diameter, and depends on whether oiltightness, watertightness or strenght is to be the governing requirement.
Riveting chain
A term applied to two or more rows of rivets that have their centers opposite each other. A line drawn perpendicular to the edge of the plate through the center of a rivet in one row will also pass through the centers of the corresponding rivets in the other rows.
RMRGC
Recommendations for Manifolds of Refrigerated for Gas Carriers for Cargoes
RNC
Raster Navigational Chart
RNLI
Royal National Lifeboat Institution
Roaring forties
That geographical belt located approximately in 40 degrees south latitude in which are encountered the prevailing or stormy westerlies.
ROB
Remaining On Board
ROC(M)
Restricted Operator’s Certificate (Maritime)
ROC(MC)
Restricted Operator’s Certificate (Maritime Commercial).
Roll
Motion of the ship from side to side, alternately raising and lowering each side of the deck
Roller fairleader
A block, ring, or other fitting through which passes a line or the running rigging on a ship to prevent chafing.
Rolling chocks
Same as bilge keel.
Ro-Pax
Vessel designed with combined Ro-Ro and passenger capacity.
Ro-Ro
Roll-on Roll-off. Method of cargo transfer between vessel and shore in which cargo is driven on/off using fork-lift, primemover/ trailer combinations, etc.
RPS
Recruitment Placement Services
RRS
Release Retrieval System
RSS
Radio Standards Specification.
RT
Revenue Ton (i.e. 1.0 metric Ton or 1.0 cubic meter, whichever is greater). The overall RT is calculated on a line by line basis of the Packing List using the largest amount. The overall freight liability is calculated on the total RT amount, multiplied by the freight rate.
Rubber-tired gantry (RTG) or rubber-tired container gantry crane
Gantry crane on rubber tires typically used for acceptance, delivery, and container stacking at a container yard.
Rubrail
A protective railing on the hull of a vessel which is used for fendering.
Rudder
A swinging flat frame hung to the stern post of a ship, by which the ship is steered.
Rudder bands
The bands that extend on each side of a rudder to help brace and tie ii into the pintles.
Rudder chains
The chains whereby the rudder is fastened to the stern quarters. They are shackld to the rudder by bolts just above the water line, and hang slack enough to permit free motion of the rudder. They are used as a precaution against losing a rudder at sea.
Rudder flange
The flange which ties the main part of the rudder to the rudder stem. It may be horizontal or vertical.
Rudder frame
A frame within the inner shell, bolted through the letter into the main frame and shell, for the purpose of stiffening the rudder.
Rudder pintle
See Pintle
Rudder post
The vertical post in the stern of a vessel on which the rudder hangs.
Rudder stock
Vertical shaft connecting the rudder to the steering actuating system.
Rudder stop
Fitting to limit swing of the rudder.
Rudder truck or case
The well in the stern which holds the rudder stock.
RUF
Rules for the Use of Force
Run
The narrowing sides of a vessel aft where they meet at the hooding-ends.
Run down
To collide with a vessel head on.
Running lights
Those lights required to be shown at night aboard a vessel or a tow while underway.
Rustbucket
Sailors’ term for an old ship that needed a lot of paint and repairs.
S
Sacrificial anode
Anode of zinc attached to the immersed parts of a hull to prevent deterioration of the hull steel through electrochemical reaction.
Safety Communications
The transmission of messages dealing with hazards to navigation and meteorological information.
Safety of Life at Sea (SOLAS)
A statutory regulation of IMO dealing with the safety of life at sea.
Sagged
Said of a ship which has been strained so that the bottom drops lower in the middle than it is at stem and stern. Opposite of hogged.
Sagging
A ship is said to sag if the forces acting on it make it bend longitudinally concave up. Sagging is the opposite of hogging.
Sailing free
Sailing other than close; hauled or into the wind (wind astern).
SALM
Single Anchor Leg Mooring
Salty character
A nautical guy, often a negative connotation.
Salvage
To save a vessel or cargo from total loss after an accident; recompense for having saved a ship or cargo from danger.
Salvage tug
Large powerful and manoeuvrable vessel designed to tow and assist vessels needing assistance due to grounding, sinking or fire.
SAMHSA
Substance Abuse and Mental Health Services Administration
Samson posts
Short heavy masts used as boom supports, and often used for ventilators as well.
SAR
Search and Rescue.
SART
Search and Rescue Transponder.
SATPM
Saturday P.M.
SATV
Safe Access to Vessels Working Group
SB
Safe Berth
Scale
To climb up. A formation of rust over iron or steel plating.
Scantling
A term applied to the dimensions of the frames, girders, plating, etc., that go into a ship’s structure. The various classification societies publish rules from which these dimensions may be obtained.
Scantlings
Set of dimensions of a vessel’s structure. (Structural dimensions.)
Scarfing
A method of cutting away two pieces so that they fit smoothly into each other to make one piece. They are fastened together by welding, bolting, riveting, etc.
SCBA
Self-Contained Breathing Apparatus. Such an apparatus consists of a suitable face mask, combined with a hose and source of fresh air, generally in the form of a tank of compressed air. The SCBA may be incorporated into a full-body protection suit. It is important to recognise that use of a SCBA is not trivial, and they are not designed to be worn by those without training.
SCBRA
Speed Reduction and Bunker Consumption Algorithm
School
A large body of fish.
Scow
Another term for a deck cargo barge having a hull design of a flat bottom, square ended rakes, and usually with a deck cargo bin.
Screen bulkhead
A light bulkhead fitted between engine and boiler rooms, designed to keep dust and heat out of the engine room. Often built around the after ends of boilers.
Scrieve board
A large section of flooring in the mold loft in which the lines of the body are cut with a knife. Used in making molds of the frames, beams, floor plates, etc.
SCUBA
Self-Containerd Underwater Breathing Apparatus
Scupper
Any opening or tube leading from the waterway through the ship’s side, to carry away water from the deck.
Scupper hose
A temporary canvas hose attached to the outside of a scupper hole, and reaching to the water, to conduct the water clear of the ship’s side.
Scupper lip
A projection on the outside of the vessel to allow the water to drop free of the ship’s side.
Scupper opening
A hole longer than an ordinary scupper with vertical bars, placed on the side of the ship at the deck line to allow deck wash to flow over the side of the vessel. Also called freeing port.
Scupper pipe
A pipe connected to the scupper on the decks, with an outlet through the side plating just above the water. The water thus diverted from the deck does not discolor the ship’s side plating or damage the paint.
Scuppers
Openings in the side of a ship to carry off water from the waterways or from the drains.
Scuttle
A small opening, usually circular in shape, and generally fitted in decks to provide access as a manhole or for stowing fuel, water and stores. A cover or lid is fitted so that the scuttle may be closed when not in use. Also applied to the operation of opening a sea valve or otherwise, allowing the sea to enter a ship for the purpose of sinking her.
Scuttle butt
The designation for a container of the supply of drinking water for the use of the crew.
Scuttle butt story
An unauthoritative story (a tall story).
SD (or SID)
Single Decker
SEA
Seafarer Employment Agreement
Sea anchor
A drag (drogue) thrown over to keep a vessel to the wind and sea.
Sea Areas
Areas defined by GMDSS used to determine communication equipment requirements for vessels.
Sea chest
A sailor’s trunk; the intake between the ship’s side and a sea valve.
Sea dog
An old sailor.
Sea going
Capable of going to sea.
Sea lawyer
A seaman who is prone to argue, especially against recognized authority (big mouth).
Sea painter
A line leading from forward on the ship and secured to a forward inboard thwart of the boat in such a way as to permit quick release.
SEAFREIGHT
Costs charged for transporting goods over the sea. This does not cover any haulage or loading/discharging costs but the sea transport only.
Seam
Joint.
Seamstrap
Butt-strap of a seam.
Search and Rescue Region of responsibility (SRR)
Rescue Coordination Centres are responsible for a geographic area, known as a “search and rescue region of responsibility” (SRR). SRRs are designated by the International Maritime Organization (IMO) and the International Civil Aviation Organization (ICAO)
Seaworthy
Capable of putting to sea and able to meet sea conditions.
SECA
Sulphur (SOx) Emission Control Area
Section
(1) General term for an extruded or fabricated structural member. [Alt profile.] (2) Transverse vertical plane through the hull perpendicular to the centreline.
Secure
To make fast; safe; the completion of a drill or exercise on board ship.
Secure for sea
Prepare for going to sea, extra lashing on all movable objects.
Sécurité
The signal used to indicate that a Safety Communication is to follow.
Seelonce
The international procedural word for Silence.
SEEMP
Ships Energy Efficiency Management Plan
Seize
To bind with small rope.
SELFD
Self Discharging
Semaphore
Flag signaling with the arms.
SENC
System Electronic Navigational Chart
Serrated frame
Sometimes pieces of an angle iron are cut to allow for ventillation, reduce weight or as a shortcut that saves material in the vessel costruction. These cutouts may be spaced regularly-every few inches or so and the frame is called a serrated frame.
Set bolt
A bolt used as a drift to force another bolt out of its hole.
Set iron
Bar of soft iron used on the bending slab to bend frames to the desired shapes.
Set the course
To give the steersman the desired course to be steered.
Set up
To tighten the nut on a bolt or stud.
Set up rigging
To take in the slack and secure the standing rigging.
Sett piling
Reinforcing pilling in the ground beneath the ways.
Settle
To lower, sink deeper.
SF
Stowage factor. Cubic space occupied by one ton (2,240 lbs/1,000 kgs) of cargo.
SFG
Special Forces Group
Shackle
A link with a bolt fastened through its eyes, used for fastening chains and eye loops together.
Shaft
Long, round, heavy forging connecting engine and propeller.
Shaft alley
Covered tunnels within a ship through which the tail shafts pass.
Shaft coupling
A flange on the end of a shaft section connecting two sections by bolts.
Shaft pipe
A pipe which pases through a hole in the stern post and through frames with a circular housing. In it are bearings on which the propeller shaft rotates.
Shaft strut
A brachet supporting the after end of the propeller shaft and the propeller in twin or multiple screwed vessels having propeller shafts fitted off from the center line.
Shaft tunnel
Same as shaft Alley.
Shake a leg
An order to make haste.
Shakedown cruise
A cruise of a new ship for the purpose of testing out all machinery, etc. Shank. The main piece of the anchor having the arms at the bottom and the Jew’s harp at the top.
Shanghaied
The practice of obtaining a crew by means of force. Crews were hard to get for long voyages, and when the unwilling shipmate regained consciousness, he found himself bound for some remote port, such as Shanghai. One who is forced to do something against his will.
Shape
Long bar of constant cross section such as channel, T-bar, angle bar, etc.
Shape a course
To ascertain the proper course to be steered to make the desired point or port. Shark’s mouth. The opening in an awning around the mast.
Shaping
Consists of cutting, bending and forming astructural member.
Shear legs
Usually two or more timbers or spars erected in the shape of an A-frame with lower ends spread out and upper ends fastenes together, from which lifting tackle is suspended. Used fro raising and moving heavy weights where a crane or derrick is not available.
Shear line
A line at which a shearing cut is to be made.
Shears
Large machine for cutting plates and shapes.
Sheave
The wheel of the block over which the fall of the block is rove.
Shed (also see warehouse)
Covered area for the reception, delivery, consolidation, distribution and storage of cargo. Note: A warehouse usually points at longer term storage, whereas a shed usually is used for shorter term storage.
Sheer
Upward longitudinal curvature of the upper deck.
Sheer plan
A vertical lngitudinal midship section of a vessel, showing plan, elevation and end view, on which are projected various lines as follows: Water line, diagonal line, buttock and bow lines, mainbreadth lines, top-breadth lines, top side sheer lines.
Sheer rail
A rail surrounding a ship on the outside, under the gunwale, on small vessels called guard rail.
Sheer strake
The uppermost strake (line) of side shell plating immediately adjacent to the strength deck.
Sheet
The rope used to spread the clew of head sails and to control the boom of boom sails.
Shell
The casing of a block within which the sheave revolves.
Shell expansion
A plan showing the shapes and sizes of all plates of the shell plating.
Shell landings
Point on the frames showing wher the edges of the shell plates come.
Shell plating
See plating.
Shelter deck
A term applied to a deck fitted from stem to stern ona relatively light superstructure. The main deck.
SHEX
Sundays/Holidays Excluded
Shift
used to indicate a change to another channel
Shift of butts
A term applied to the arrangement of the butt joints in plating. These joints in shell plating should be so shifted that the adjacent strakes of plating have their butts at least two frame spaces apart.
Shifting beam
A portable beam fitted in a hatchway for the purpose of supporting the hatch covers. The ends of the beams are fitted in slotted carriers attached to the inside of the hatchway coamings.
Shim
A piece of metal or wood placed under the bedplate or base of a machine or fitting for the purpose of truing it up. Also applied to pieces placed in slack spaces behind or under frames, plates or planks to preserve a fair surface.
SHINC
Sundays/Holidays Included
Ship
To enlist; to send on board cargo; to put in place; to take on board.
Ship chandler
An individual or company selling equipment and supplies for ships.
Ship routing
An attempt to guide a ship into areas where it will experience less severe weather and so reduce passage times.
Ship Station
a radio station installed on a vessel
Ship to Shore
the communication link between a ship station and a shore station
Ship’s log
See Log Book
Ship’s tackle
All rigging and so forth used on a ship to load or unload cargo.
Ships time
Ships time was counted by the half hour, starting at midnight. A half hour after twelve was one bell; one o’clock, two bells; and so on until four o’clock, which was eight bells. The counting then started over again, with 430 being one bell.
Shole
A piece of plank put under a shore where there is no groundway.
Shore
One of the many wooden props by which the ribs or frames of a vessel are external supperted while building, or by which the vessel is held upright on the ways.
Short stay
When the scope of chain is slightly greater than the depth of water.
Short ton
American ton (2000 lbs). 0.9072 tonnes.
Shorthanded
Without sufficient crew.
Shot
A short length of chain, usually 15 fathoms (90 feet). (Method of measuring chain.)
Shove in your oar
To break into a conversation.
Shrouds
Side stays from the masthead to the rail..
Shuttle tanker
Moderate sized tanker designed for the regular short-haul transport of oil between FPSO vessels or single point mooring buoys and coastal refinery terminals.
Side keelson
A beam placed on the side of the hull about two-thirds the distance from the center line to the bilgeway. This ia uesd as a stiffener logitudinally for the flat bottom of a vessel.
Side lights
The red and green running lights, carried on the port and starboard sides respectively, of vessels under-way.
Side loader
A lift truck fitted with lifting attachments operating to one side for handling containers.
Sight edges
The edges of plating that are visible are called sight edges. The sight edge is on the outside of the shell, on the tops of decks and inner bottom plating, and on the opposite side from the stiffeners on bulkheads. The edge that is covered is called the landing edge.
Signal
the transmission of a designated international word or electronic tone that alerts stations that a specific call and/or message are to follow, as it pertains to radio operation
SIGTTO
Society of International Gas Tanker & Terminal Operators
Simplex
a radio channel using a the same frequency for both transmitting and receiving
Sing out
To call out.
SIRE
Ship Inspection Report
Sister hooks
Two iron flatsided hooks reversed to one another.
Skeg
The after part of the keel, upon which the stern post rests.
Skids
Beams sometimes fitted over the decks for the stowage of heavy boats or cargo.
SKIDS
Are bearers (timber or steel) positioned under cargo to enable fork lift handling at port, and for ease of rigging and lashing on board ship.
Skin
The plating of a ship. The inside skin is sometimes called the ceiling, the outside skin the case. It consists of steel plates laid in alternate inside and outside strakes.
Skipper
The captain.
Sky pilot
A chaplain.
Skylight
An erection built on a deck, having glass lights in its top and fitted over an opening in the deck for the purpose of admitting light and air to a compartment below.
SL
Bale (capacity)
SLA
Safety Level Approach
Slack
The part of a rope hanging loose; the opposite of taut.
Slack water
The condition of the tide when there is no horizontal motion.
Slamming
The impact of the hull, usually the bow area, with the sea surface when in waves.
SLF
Stability and Load Lines and on Fishing Vessels’ Safety
Sliding ways
One of the structures on each side of and parallel to the keel, supporting the crandle under the bilgeways on which the vessel rests in launching. The sliding ways form the inclined plane down which the vessel slides, made of planks laid on blocks of wood.
Slip
To let go by unshackling, as a cable.
Slop chest
Stock of merchandise, such as clothing, tobacco, etc., maintained aboard merchant ships for sale to the crew
Slop chute
Chute for dumping garbage overboard.
Sluice
An opening in the lower part of a bulkhead fitted with a sliding watertight gat or door having an operating rod extending to the upper deck or decks. These openings are useful in center line bulkheads, as in case of damage to one side of the ship the water may be quickly admitted to the other side before the ship is dangerously listed.
Slush
White-lead and tallow used on standing rigging.
Smart
Snappy, seamanlike; a smart ship is an efficient one.
SMC
Safety Management Certificate
Smokestack
A metal chimney or passage through which the smoke and gases are led from the uptakes to the open air.
Smothering lines
Pipe lines to a compartment for smothering a fire by steam or by a chemical.
SMT
Ship Mean Time
SNAME
Society of Naval Architects and Marine Engineers (USA).
Snibs
Handle that can be operated from both sides of a watertight door.
Snipe
To cut a sharp bevel on the end of a stiffener or beam.
Snub
To check suddenly.
Sny
To twist a plate into an uneven warped shape on a mold.
SOA
Speed of Advance
SOC
Shipper Owned Container
SOF
Statement Of Facts
Soft plate
A plate put on over a break or hole, and secured with tap bolts. It is made watertight with a gasket such as canvas saturated in red lead.
SOHSP
Shipboard Occupational Health and Safety Program
SOLAS
International Convention for Safety of Life at Sea.
Sole patch
A plate fitted to the top of a foundation to which the base of a machine is bolted. Also a small plate fitted at the end of a stanchion.
Sole plate
A plate fitted to the top of a foundation to which the base of a machine is bolted. Also a small plate fitted at the end of a stanchion.
SOP
Standard Operating Procedure
Sound
To measure the depth of the water with a lead. Also said of a whale when it dives to the bottom.
Sound out a person
To obtain his reaction to something.
Sounding
Measuring the depth of water or other liquid.
Sounding pipe
Vertical pipe in oil or water tank, used to guide a sounding device when measuring the depth of liquid in tank.
Southwester
An oil-skin hat with broad rear brim.
SP
Safe Port
Span
The distance between any two similar members, as the span of the frames. Also used to describe the length of a member between its supports, as the span of a girder.
Spanner
A form of open-head wrench.
Spar
A pole used for a hoist or in scaffolding.
Sparks
The radio operator.
SPC
Self-polishing copolymer antifouling paint.
Speak
To communicate with a vessel in sight.
Specific gravity
The ratio of the weight of a given volume of any substance to the weight of an equal volume of distilled water, and is found by dividing the first weight by the second. Since the distilled water weights approximately 62.4 pounds per cubic foot, any substance, a cubic foot of which weighs less than this, has a specific gravity of less than one, and will float on water. Any substance of greater weight per cubic foot has a specific gravity of more than one and will sink>
Specifications
Specified details relating to the performance, operating conditions, construction and quality of an engineered item.
Spectacle frame
A single casting containing the bearings for and supporting the ends of the propeller shafts in a twin-screw vessel. It consists of arms of pear-shaped section extending outboard from each side of the center line of the ship to bosses, taking the bearings of the propeller shafts. Used in large metchant vessels in place of shaft struts or brackets.
Spectrum Management
The division of Innovation, Science and Economic Development Canada (IC) responsible for regulating and licensing radio frequencies.
Spiling
The curve of a plate or strake as it narrows to a point.
Spill
To empty the wind out of a sail.
Splice
A method of uniting the ends of two ropes by first unlaying the strands, then interweaving them so as to form a continuous rope.
SPM
Self Protection Measures
SPMOMG
SPM Operating & Maintenance Guidelines
Sponson
An addition to the side of a vessel that is outside its normal hull and which provides added deck space and/or greater flotation stability.
Spote-faced
Indicates that an annular bacing has been made about a bolt hole to allow a nut or head to seat evenly.
Spotting
Placing a container where required to be loaded or unloaded.
Spreader
Beam or beam structure temporarily attached to and spanning the extremes of an item being lifted.
Spring line
Usually of the best wire hawsers; one of the first lines sent out in mooring. “Springs in and springs out” a vessel.
Spud
A steel or wooden post or pile that is placed vertically through a well in the hull of a vessel and which, when lowered to the bottom of the waterway, anchors the vessel.
Spudwell
A casing which is attached to or passes through the hull of a vessel through which a spud is raised or lowered.
Squall
A sudden and violent gust of wind.
Square frame
A frame having no bevel on its flange. A midship frame
Squeegee
A deck dryer composed of a flat piece of wood shod with rubber, and a handle. Stanchions. Wooden or metal uprights used as supports (posts).
SRBL
Signing and Releasing Bill of Lading
SRML
Single Rope Maximum Loading
SSAS
Ship Security Alert System
SSB
Single Sideb and
SSBA
Surface Supplied Breathing Apparatus
SSHEX (or SATSHEX)
Saturdays, Sundays, Holidays Excluded
SSHINC
Saturdays, Sundays, Holidays Included
SSRS
Ship Security Report System
Stabiliser(s)
Protruding hydraulically-activated fin(s) which reduces roll amplitude through oscillatory action creating alternating lift vectors phased to counter roll.
Stability
Tendency of the ship to remain upright.
STABILITY
It is paramount that a vessel is stable in all respects at all times. When cargo is loaded / discharged, the stability is monitored by a computer, which takes into account the weight and position of cargo within the vessel.
Stack
The ship’s funnel or smokestack.
Stackcar
An articulated multiple platform rail car that allows containers to be double stacked.
Stacktrain
A rail service whereby rail cars carry containers stacked two high on specially operated unit trains.
Stagger
To zigzag a line, or row of rivet holes, etc.
Staging
Upright supports fastened together with horizontal and diagonal braces forming supports for planks which form a working platform.
Stanchion
An iron post or pillar for supporting the decks.
Stand by
A preparatory order
Stand Down
not required, return to normal operations
Standard compass
The magnetic compass used by the navigator as a standard.
Standing part
That part of a line or fall which is secured.
Standing rigging
That part of the ship’s rigging which is permanently secured and not movable, such as stay, shrouds, etc.
Stapling
Collars, forged of angle bars, to fit around continuous members passing through bulkheads or decks for watertightness.
Starboard
The right side of a vessel looking forward.
Stateroom
A private room or cabin for the accommodation of passengers or officers.
Static load
Structural loading of constant magnitude and application.
Station bill
The posted bill showing stations of the crew at maneuvers and emergency drills.
Station Licence
A licence issued by Innovation, Science and Economic Development Canada to vessels not exempt.
Staunch
Still, seaworthy, able.
Stay
A rope of hemp, wire or iron leading forward or aft for supporting a mast.
Stays
The rope, whether hemp or wire, that support the lower masts, topmasts, topgallant masts, etc., in a fore and aft direction.
STCW
Standards of Training, Certification and Watchkeeping
Steady
An order to hold a vessel on the course she is heading.
Stealer or steeler
The foremost or aftermost plate in a strake, which is dropped short of the stem or stern post of a vessel.
Steerage way
The slowest speed at which a vessel steers.
Steering flat
Compartment above the rudder(s) containing the vessel’s steering actuation system(s).
Steering gear
A term applied to the steering wheels, leads, steering engine and fittings by which the rudder is turned.
Steering gear flat
The deck above the stern overhang, on which the rudder steering mechanism is installed.
Steering wheel
The wheel operating the steering gear and by which the vessel is steered.
Stem
The upright post or bar of the bow.
Stem foot
The forward end of the keel, into which the stem is fitted.
Stem the tide
Stemming the tide or sea means to head the vessel’s bow directly into the current or waves. Overcome adverse circumstances.
Stepping-up pieces
Same as poppets.
Stern
The after part of the vessel.Stern3
Stern anchor
An anchor carried at the stern.
Stern board
Progress backwards.
Stern door
Watertight horizontally-hinged door integral to the transom on a stern-loading Ro-Ro vessel.
Stern frame
Large casting attached to after end of keel to form ship’s stern. Includes rudder post, propeller post, and aperture for the propeller.
Stern pipe
A pipe leading to the opening at the side of poop deck for passing through of cables, chains, etc., for mooring purposes.
Stern post
The after post to which the rudder is hinged and placed on the skeg, with sufficient clearance for the propeller to revolve.
Stern ramp
Stern- (transom) mounted hinged platform located to permit the loading/discharge of vehicles aboard a Ro-Ro vessel.
Stern thruster
A propulsor installed near the stern to provide transverse a thrust component enhancing manoeuvrability.
Stern tube
The bearing which supports the propeller shaft where it emerges from the ship. A cast iron or steel sylinder, fitted with brass bushings which are lined with lignum vitae or white metal bearing surfaces, upon which the propeller shaft, enclosed in a brass sleeve, rotates.
Sternlog
The reinforced, vertical shell plating which connects the stern rake bottom to the rake deck of a barge.
Stevedore
A professional cargo loader and unloader.
Stiffener
An angle bar or stringer fastened to a surface to strengthen it and make it rigid.
STOLGOE
The Safe Transfer of Liquefied Gas in an Offshore Environment
Stop water
A wood plug driven through a scarf joint to stop water from leaking into the ship. The term is also applied to pieces of canvas soaked in oil, red lead, etc., placed between the faying surfaces of plates and shapes where water or oil is apt to work its way through.
Stopper
A short length of rope secured at one end, and used in securing or checking a running rope, e.g., deck stopper, boat fall stopper, etc.
Storeroom
The space provided for stowage of provisions or other materials.
Storm warning
An announced warning of an approach of a storm.
Sto-ro
A vessel with capacity for breakbulk cargo as well as vehicles or trailer borne cargo.
Stove
Broken in.
Stow
To put in place.
Stowage factor
The average cubic space occupied by one ton weight of cargo as stowed aboard a ship.
Stowaway
A person illegally aboard and in hiding.
Straddle carrier
Type of equipment that picks up and transports containers between its legs for movement within a container terminal.
Strake
A continuous line of plates on a vessel’s side, reaching from stem to stern.
Strand
A number of yarns, twisted together and which in turn may be twisted into rope; a rope is stranded when a strain is broken; rope may be designated by the number of strands composing. Rope is commonly three-stranded. A vessel run ashore is said to be stranded.
Strap
A ring of rope made by splicing the ends, and used for slinging weights, holding the parts of a block together, etc. A rope, wire or iron binding, encircling a block and with a thimble seized into it for taking a hook. Small straps used to attach a handybilly to the hauling part of a line.
Streamlined rudder
A rudder with a bullnosed round forward edge which tapers regularly to a thin after edge.
Stringer
A large beam or angle fitted in various parts of the vessel to give additional strength. Depending on their location, stringers are known as bilge stringers, side stringers, hold stringers, etc.
Stringer plate
A fore-and-aft member of deck plating which strengthens the connection between the beams and the frames, and keeps the beams square to the shell.
Strip theory
A simplified theory for calculating ship motions.
Stripping (unstuffing)
Unloading of a container.
Strongback
A light spar set fore and aft on a boat, serving as a spread for the boat cover.
Strut
Support structure (with streamlined cross-section) for propeller shafting in a multi-screw vessel. [Alt shaft bracket.]
STS
Ship to Ship
STW
Standards of Training and Watchkeeping
SUB
Subject (to)
Suezmax
A term applied to cargo ships which are just able to transit the Suez Canal.
Summary Conviction
found guilty by a court of law under the Summary Convictions Act
SUPERCARGO
Person employed by a ship owner, shipping company, charterer of a ship or shipper of goods to supervise cargo handling operations. Often called a port captain.
Superfluous Communications
excessive and/or unnecessary communications
Superstructure
(1) General term for sections of a vessel constructed on and above the upper or main decks of a vessel. (2) A more restrictive term under the International Convention on Load Lines, (1966) detached enclosed structure on the freeboard deck and extending transversely to within 4% of the breadth from the vessel’s sides.
Surge
To ease a line to prevent it from parting or pulling, meanwhile holding the strain.
Swab
A mop.
SWAD
Salt Water Arrival Draft
Swage
To bear or force down. An instrument having a groove on its under side for the purpose of giving shape to any piece subjected to it when receiving a blow from a hammer.
Swamp
Sink by filling with water.
Swash bulkhead
A partial bulkhead used for the same purpose as a swash plate.
Swash bulkhead (plate)
Longitudinal or transverse perforated bulkhead (baffle) fitted in a tank to reduce the surging of the contents.
Swash plates
Plates fixed in tanks to prevent excessive movement of the contained liquid.
SWDD
Salt Water Departure Draft
Swell
A large wave.
Swing ship
The evolution of swinging a ship’s head through several headings to obtain compass errors for the purpose of making a deviation table.
Swinging over
Swing of the boom from one side of the ship to the other when the tack is changed.
Switch and Answer
A request to change to a specific radio channel and respond to the call.
Switch to
a request to change to a specific channel
SWL
Safe working load; certified load limit applied to lifting appliances and gear.
Syncrolift
A platform fitted with winches and anchor chain. The winches lower the platform into the water, the vessel is floated an and the platform is raised. Sometimes the vessel can be rolled to a repair station on railroad track.
T
Tackle
Any combination of ropes and blocks that multiplies power. A single whip, improperly called tackle, gives no increase in power, but a change in direction of the power but a change in direction of the power applied.
Taffrail log
The log mounted on the taffrail and consisting of a rotator, a log line and recording device (to measure distance run through the water).
Tailshaft
Aftermost section of the propeller shafting, carrying propeller.
Take a turn
To pass a turn around a belaying pin or cleat.
Take in
To lower and furl the sails.
Taking on more than you can carry
Loaded with more cargo than a ship can safely navigate with. Drunk.
Tank top
The plating laid on the bottom floors of a ship, which forms the top side of the tank sections or double bottom.
Tanker
A ship designed to carry various types of liquid cargo, from oil and gasoline to molasses, water, and vegetable oil.
Tanks
Compertments for liquids or gases. They may be formed by the ship’s structure as double bottom tanks, peaktanks, deep tanks, etc., or may be independent of ship’s structure and installed on special supports.
Tare weight
The weight of wrapping or packing; added to the net weight of cargo to determine.
Tarpaulin
Heavy canvas used as a covering.
Taut
With no slack; strict as to discipline.
TCPA
Time to Closest Point of Approach
Tee bar
A rolled shape, generally of mild steel, having a cross section shaped like the letter “T”. In ship work it is used for bulkhead stiffeners, bracket and floor clips, etc. The size is denoted by dimensions of its cross section and weight per running foot.
Telegraph
Means of signalling from bridge to engine room, etc.
Template
A pattern made in themold loft from wood strips or heavy paper.
Tenon
The end of a piece of wood cut into the form of a rectangular prism, designed to be set into a cavity of a like form in another piece which is termed mortise.
Test head
The head of water corresponding to the pressure prescribed as a test for bulkheads, tanks, compartments, etc. Test heads are prescribed to insure satisfactory water or oil tightness, and also as tests of strength.
TEU
Twenty-foot equivalent unit. A standard of measurement used in container transport based on the dimensions of a container 20 ft long ´ 8 ft wide ´ 8.5 ft high; (6050 ´ 2440 ´ 2590 mm).
That’s high
An order to stop hoisting.
Thimble
An iron ring with a groove on the outside for a rope grommet or splice.
Tholes
The pins in the unwale of a boat which are used for carlocs.
Thread
The spiral part of a screw.
Three sheets to the wind
Sailing with three sheet ropes running free, thus making the ship barely able to keep headway and control. Drunk.
Throwing a Fish
Saluting
Thrust block
A bearing arrangement, aft of the engine(s), by which the thrust of the propeller is transmitted to the ship.
Thwart
The athwartships seats in a boat on which oars-men sit.
Thwarts
Boards extending across a rowboat just below the gunwale to stiffen the boat and to provide seats.
Thwartships
At right angles to the fore and aft line (across the ship).
Tie plates
A single fore-and-aft or diagonal course of plating attached to deck beans under wood deck to give extra strength.
Tiller
An are attached to rudder head for operating the rudder.
TLV
Threshold Limit Value
TM
Tonnage Measurement
TMSA
Tanker Management Self Assessment
Toe
The edge of the flange of an angle.
Toggle
A small piece of wood or bar of iron inserted in a knot to render it more secure, or to make it more readily unfastened or slipped.
Toggle pin
A pin, usually having an eye worked on the head, and having a point so constructed, that a portion of it it may turm on a pivot pin, forming a tee shaped looking device to keep the pin in place.
Tongue
The tongue of a stern post or propeller post is the raised middle section which is fastened to the vertical keel. A a rule the tongue is raised twice as high as the sides of the dished keel.
Tonnage
A measure of the volume of a ship. In simple terms the gross tonnage (GRT)represents the total enclosed volume of the ship and the net tonnage (NT) represents the volume of cargo and passenger spaces. Tonnage is defined by internationally agreed formulae, and is used for dues for drydocking and pilotage and port and harbour dues etc. It should be noted that tonnage represents a function of volume and should not be confused with deadweight mass (tonnes), Lightship mass (tonnes) or displacement mass (tonnes).
Tonnage openings
Openings in shelter deck bulkheads for purpose of economy in tonnage rating.
Tonnage, gross
The entire internal cubic capacity of a vessel expressed in “tons” taken at 100 cubic feet each. The peculiarities of design and construction of the various tyoes of vessels and their parts necessitate certain explanatory rulings in connection with this term.
Tonnage, net
The internal cubic capacity of a vessel which remains after the capacities of certain specified spaces have been deducted from the gross tonnage.
Tonnes per centimetre immersion (TPC)
The extra buoyancy experienced due to increasing the draught by 1 cm.
Top breadth lines
The width of a vessel measured across the shelter deck.
Top-heavy
Too heavy aloft.
Topping lift
A rope or chain extending from the head of a boom or gaff to a mast, or to the vessel’s structure for the purpose of supporting the weight of the boom or gaff and its loads, and permitting them to be totated at a certain level.
Topside
That portion of the side of the hull which is above the desidgned water line.
Torsional strength
The strength of the hull in resisting twisting about a longitudinal axis.
Tow
To pull through water; vessels towed.
Towage
Charges for the services of tugs assisting a ship or other vessels in ports.
TPA
Third Party Auditor
TPRG
Terminal Policy Review Group
TPSG
Terminal Policy Steering Group
Track
The path of the vessel.
Tractor propulsion
A system of vertical blades used to propel a vessel in the water. Used on some harbour tugs and ferries. Made by Volith. Sometimes called a cyclonic system in reference to the way the blades are mounted under the hull, and the way they turn.
Trades
The practically steady winds blowing toward the equator, N.E. in the northern and SE. in the southern hemisphere.
Traffic
communications between stations
Tramp line
An ocean carrier company operating vessels on other than regular routes and schedules.
Transceiver
A radio receiver and transmitter combined into a single unit.
Transhipment
A distribution method whereby containers or cargo are transferred from one vessel to another to reach their final destination, compared to a direct service from the load port of origin to the discharge port of destination. This method is used to gain better vessel utilization and thereby economies of scale by consolidating cargo onto larger vessels while transiting in the direction of main trade routes.
Transmit Switch
The device attached to the microphone that, when depressed, allows the operator to transmit radio waves (also known as “push-to-talk button”).
Transom
Square-ended stern.
Transom beam
A strong deck beam in the after end of a vessel directly over the stern post, and connected at each end to the transom frame. The cant beams supporting the deck plating in the overhang of the stern radiate from it.
Transom frame or plate
A horizontal frame under a ship’s counter.
Transponder
A radio transceiver that automatically responds to a radar or radio signal.
Transverse
(1) Alignment perpendicular to the centreplane of a vessel. (2) Deck beam.
Transverse bulkhead
A partition wall of planking or plating running in an athwartship direction across a portion or the whole breadht of a ship. The principal function of transverse bulkheads is to divide the ship into a series of watertight compartments so that any rupture of the shell will not cause the loss of the vessel.
Transverse planes
Vertical planes normal to the centreline plane of the ship.
Transverse sections
The intersections of transverse planes with the envelope of the ship’s hull.
Transverse stability
A measure of a ship’s stability in relation to rotation about a longitudinal axis.
Trawler
Fishing vessel designed for operation involving the towing of submerged nets.
TRCF
Total Recorded Case Frequency
Tread
The length of a vessel’s keel.
Treenails
Wooden pins employed instead of nails or spikes to secure the planking of a wooden vessel to the frames.
Trice
To lash up.
Tricing line
A line used for suspending articles.
Trick
The period of time during which the wheelsman remains at the wheel.
Trim
The longitudinal attitude of a vessel, i.e., the difference between forward and aft drafts.
Trip
To let go.
Tripping brackets
Flat bars placed at various points on a deck girder or beams as reinforcement.
Tripping line
A line used for capsizing the sea anchor and hauling it in.
Truck
The flat circular piece secured on the top of the mast.
Trunk
Vertical space or passage formed by bulkheads or casings extending 1 or more decks providing access or through which piping or cabling may be conducted.
Trunk bulkhead
The casing or partition that forms an enclosures running from deck to deck and surrounding the hatch openings.
Try square
A small and handy instrument for trying the square of surfaces while planing or fairing up with any tool. They come in various sezes and should be handled carefully to avoid knocking them out of true, and thus causing material to be spoiled by inaccurate work.
TSGB
Training Ship Golden Bear (California Maritime Academy)
TSS
Traffic Separation Scheme
TTL
Total
Tuck
The after part of a ship where the sheel plating meets tn the run and is tucked together.
Tug
Small powerful and highly manoeuvrable vessel designed for towing, assisting and manoeuvring larger vessels in port or restricted waterways.
Tug boat
A small vessel fitted for towing.
Tumble home
Said of the sides of a vessel when thwy lean in at the top. When vertical they are called wallsided, when they lean out, flaring.
Turn in all standing
Go to bed without undressing.
Turn to
An order to commence ship’s work.
Turn turtle
To capsize.
Turnaround time
The time it takes between the arrival of a vessel and it’s departure from port; frequently used as a measure of port efficiency.
Turnbuckle
A connecting device usually used with cable or chain and which takes up slack by rotating on its screw threads. back
Turnbuckles
Used to pull objects together. A link threaded on both ends of a short bar, one left handed, the other right handed.
Turrets
Structures designed for the mounting and handling of the guns and accessories (usually main battery guns) of a war vessel. Turrents are constructed so as to revolve about a vertical axis usually by means of electrical or hydraulic machinery.
TW
Tween Decker
Tween decks
The space between any continuous decks.
Tween-deck
Intermediate deck within a cargo space above the lower hold and below the upper deck.
Twenty-foot equivalent unit (TEU)
Container size standard of twenty feet. Two twenty-foot containers (TEUs) equal one FEU. Container vessel capacity and port throughput capacity are frequently referred to in TEUs.
Two blocks
When the two blocks of a tackle have been drawn as close together as possible.
U
UKHO
United Kingdom Hydrographic Office (provides AIO)
ULCC
Ultra large crude carrier. Tanker of deadweight greater than 320,000 tonnes.
Ullage hatch
A small hinged opening on a tank for gauging or sampling cargo. The ullage is the distance from the top of this hatch to the top of the cargo. It is the “opposite” of innage.
Ullage opening
A small, covered opening in the top of a cargo tank through which measurements are made to determine the level of the liquid in the tank.
Umbrella
A metal shield in the form of a trustrum of qa cone, fitted to the outer casing of the smokestack over the air casing to keep out the weather.
Unbend
To untie.
Under below
A warning from aloft (heads up).
Undermanned
Insufficient number of crew; shorthanded.
Undertow
A subsurface current in a surf.
Underway
Said of a vessel when not at anchor, nor made fast to the shore, or aground.
Unitization
The consolidation of a quantity of individual items into one large shipping unit for easier and faster handling through methods such as palletizing, stripping, slinging and containerization.
Unloader
Port equipment employed to unload ships carrying dry bulk cargo.
Unmoor
To remove the ropes that attach a ship to the shore.
Unship
To remove anything from its usual place. To take apart.
Unstuffing (or stripping)
Unloading of a container.
Unwatched
Said of a lighthouse not tended.
Up anchor
Hoist or haul in the anchor.
Upper deck
A partial deck above the main deck amidships.
Upper works
Superstructures, or deck erections located on or above the weather deck. Sometimes used with reference to a ship’s entire above-water structure.
Uptake
A sheet metal conduit connecting the boiler furnace with thw base of the smokestack. It conveys the smoke and hot gases from the boiler to the stack, and should be made double thickness with an air space between to prevent radiation. Swinging dampers for controlling the fires are fitted in the uptake.
Urgency Communications
The radio traffic that follows the Urgency signal “Pan Pan”.
USC
Unless Sooner Commenced
USL
Uniform Shipping Laws (Australian federal code for the design, construction and stability of vessels.)
UU
Unless Used
UUIUATUTC
Unless Used If Used Actual Time Used To Count
V
Vapor Header
A pipeline connected to the top of a cargo tank that channels the displaced tank vapors to a shoreside control system.
Vast
An order to cease (stop).
VCG
Vertical center of gravity; an important computation used in the determination of the stability of a vessel with its cargo. back
Veer
To slack off or move off; also said of a change of direction of wind, when the wind shifts to a different direction.
VEF
Vessel Experience Factor
VEL
Velocity
Ventilation
The process of providing fresh air to the various spaced, and removing foul or heated air, gases, etc., from them. This may be accomplished by natural sraft or by mechanical means.
Ventilations, bell-mouthed or cowl
Terminals on open decks in the form of a 90o elbow with enlarged or bell shaped openings, so formed as to obtain an increase of air supply when facing the wind and to increase the velocity of air down the ventilation pipe.
Ventilator
Installation or nacelle for the intake or exhaust of ventilation air for enclosed spaces.
Ventilator cowl
The swiveled opening at the top of a ventilator.
Vertical keel
A plate running in a fore and aft direction connecting to the flat keel and keel rider plates, it is usually connected by two angles at the top and bottom for a riveted job or welded to the keel and keel rider.
Vessel manifest
Declarations made by international ocean carriers relating to the ship’s crew and contents at both the port of departure and arrival. All bills af lading are registered on the manifest.
Vessel traffic management system
Vessel control and management system (VTMS) usually under the authority of the harbormaster, comprising equipment (such as radars, tracking software, and radio communications), personnel (traffic operators0, and regulations. Most larger maritime ports have relatively advanced vessel traffic management systems for maritime safety, protection of the enviroment, and coordination of marine services.
VHF
Very High Frequency (30 MHz – 300 MHz).
VIQ
Vessel Inspection Questionnaire
Visor
A small inclined awning running around the pilot house over the windows or air ports to exclude the glare of the sun or to prevent rain or spray from coming in the openings when the glazed frames are dropped or opened. They may be of canvas or metal.
VLCC
Very large crude carrier. Tanker of deadweight between 160,000 and 320,000 tonnes.
VLOC
Very Large Ore Carrier
VOC
Volatile Organic Compound
Voice tube
A tube designed for the carriage of the human voice from one part of the ship to another. In its simplest form the voice tube system includes a speaking connection between the pilot house and engine room only. In large war vessels the system becomes very complicated. Voice tubes are generally made up to about four inchesin diameter and fitted with appropriate speaking and listening terminals.
Void space
Enclosed space (often watertight) intentionally left empty; (e.g., cofferdam).
Void tank
A watertight space that does not carry ballast or cargo. For floatation.
VP
Voyage Plan
VPD
Vessel Protection Detachment
VPQ
Vessel Particulars Questionnaire
VRM
Variable Range Marker
VTS
Vessel Traffic System.
W
Waist
The portion of the deck between the forecastle and quarterdeck of a sailing vessel.
Wake
The disturbed water left behind by a moving ship.
Wales
See Harpings.
Wardroom
A room or space on shipboard set aside for use of the officers for social purpose and also used as their mess or dining room.
WASP
Weather Analysis Service Provider
Waste
Cotton yarn used for cleaning purposes.
Watch cap
A canvas cover secured over a funnel when not in use. Sailor’s headwear, woolen type, capable of covering the ears in cold weather.
Watch officer
An officer taking his turn as officer of the watch.
Water breaker
A small cask carried in ship’s boats for drinking purposes.
Water lines
Lines drawn parallel with the surface of the water at varing heights on a ship’s outline. In the sheer plan they are straight and horizontal, in the half-breadth plan they show the form of the ship at each of the successive heights marked.
Water’s edge
The surface of the water.
Waterline
The line painted on the side of the vessel at the water’s edge to indicate the proper trim.
Waterlogged
A ship full of water but still afloat.
Water-logged
Filled with water but afloat.
Watertight
Capable of preventing the ingress of water under a head of water likely to occur in the intact or damaged condition.
Watertight bulkhead
A partition of plating reinforced where necessary with stiffering bars and capable of preventing the flow of water under pressure from one compartment to another.
Watertight compartment
A space or compartment whithin a ship having its top, bottom, ans sides constructed in such a manner as to prevent the leakage of water into or from the space.
Watertight door
A door so constructed that, when closed, it will prevent water under pressure from passing throught.
Waterway
A gutter-like recess on the shelter deck at the midship section of a ship, which delivers excess water the sea.
Waterway bar
An angle or flat bar attached to a deck stringer plate forming the in-board boundary of a waterway and serving as an abutment for the wood deck plating.
Waybill
Document, issued by a shipping line to a shipper, which serves as a receipt for the goods and evidence of the contract carrier.
Ways
The timber sills upon which a ship is built.
WCCON
Whether Customs Cleared Or Not
WCDC
Wind and Current Drag Coefficient Task Group
Weather deck
Uppermost hull deck exposed to the weather at all times.
Weather eye
To keep a weather eye is to be on the alert (heads up).
Weather side
The windward side (from where the wind is blowing).
Weathertight
Capable of preventing the ingress of water in any wind and wave conditions up to those specified as critical design conditions.
Web
The vertical portion of a beam, the athwartship portion of a frame.
Web frame
Transverse side frame with deeper web, spaced at multiples of main frame stations for the provision of extra strength.
Weeping
The very slow issuance of water through the seamsof a ship’s structure or from a containing vessel in insufficient quantity to produce a stream.
Weigh
Lift anchor off the bottom.
Weigh anchor
To lift anchor off the sea bottom.
Welding
The method of fastening steel objects together by fusing the metal with a gas flame or an electrical arc.
Welding bead
A seam made by closing a joint with molten metal applied with a welding stick.
Well
The space between the first bulkhead of a long poop deck or deck house and a fore-castle bulkhead.
Well deck
A sunken deck on a marchant vessel, fitted between the forecastle and a long poop or continuous bridge house or raised quarter deck.
Well enough
An order meaning sufficient (enough).
WGS84
World Geodetic System 1984
Whaler
Any steel or wooden member used for temporarily bracing a bulkhead, deck section, etc.
Wharf
Structure built alongside the water or perpendicular to the shore where ships berth for loading or discharging goods.
Wharfage
The charge that an owner of a facility charges for the movement of cargo through that facility.
Wheel
Nickname for propeller, steering gear control.
Where away
A call requesting direction in answer to the report of a lookout that an object has been sighted.
Whipping
A method of preventing the ends of a line from unlaying or fraying by turns of small stuff, stout twine or seizing wire with the ends tucked.
White cap
The white froth on the crests of waves.
WIBON
Whether In Berth Or Not
Wide berth
At a considerable distance.
WIFPON
Whether In Free Pratique or not
Wildcat
A sprocket wheel on the windlass for taking links of the chain cable.
Winch
A hoisting or pulling machine fitted with a horizontali single or double srum. A small drum is generally fitted on one or both ends of the shaft supporting the hoisting drum. These small drums are called gypsides, niggerheads, or winch heads. The hoisting drums either are fitted with a friction brake or are directly keyed to the shaft. The driving power is usually steam or electricity but hand power is also used. A winch is used principally for the purpose of handling, hoisting, and lowering cargo from a dock or lighter to the hold of a ship and vice versa.
Wind scoop
A device used to divert air into a compartment of a ship.
Windlass
An apparatus in which horizontallor vertical drums or gypsides and wildcats are operated by means of a steam engine or motor for the purpose of handling heavy anchor chair hawsers, etc.
Wing
To overhanging part of a deck on a ferry boat, or fore and aft of paddle boxes in a side wheeler. Also used to indicate outboard parts of the ship, such as in the wings of the hold.
Wing brackets
The arge brackets which fasten the margin plates to the lower frame ends. (Also known as deep bracket knees and bilge brackets).
Wing passage
A passage way below the water line on a man-of-war, used for repairs and inspections.
Wing tank
Ballast or cargo tank adjacent to the hull side.
Wing tanks
Tanks located autboard and usually just under the wether deck. They are sometimes formed by fitting a longitudinal bulkhead between the two uppermost decks, ans sometimes by working a diagonal, longitudinal flat between the ship’s side and the weather deck.
Wiper
A general handyman in the engine room.
WIPON
Whether In Port Or Not
Wire mesh bulkhead
A partition built up of wire mesh panel.
WLTOHC
(distance) Water Line-To-Hatch Coaming
WOG
Without Guarantee
WPD
Weather Permitting Day
WRIC
Wire Rods In Coils
WTF
Western Terminal Forum
WWD
Weather Working Day
WWNWS
World-Wide Navigational Warning System.
WWR
When, Where Ready
WWWW
Wibon, Wccon, Wifpon, Wipon
Y
Yacht
Private or charter vessel designed for pleasure cruising, racing, etc. propelled by wind or power.
YAR
York Antwerp Rules
Yard
A term applied to a spar attached at its middle portion to a mast and running athwartship across a vessel as a support for a square sail. Signal halyards, lights, etc.
Yardarm
A term applied to the outer end if a yard.
Yaw
To steer wildly or out of line of course.
Yield stress
Stress limit within a material at which plastic (permanent) strain commences under load.
Z
Z-drive
Propulsion train configuration where the engine output and propeller shafts are horizontal and parallel and linked via an intermediate vertical shaft.
Zee-bar
A structural shape with a cross section resembling the letter Z.
Zenith
When the sun is in the zenith and observed with a sextant, the arc will be 90o from the horizon.
Zinc primer
Common corrosion inhibiting primer used to coat bare steel prior to subsequent paint coatings being applied.