Who are Mark and Marijke Ham?

Mark and Marijke Ham are the professional sailors and creators behind Cat Greatcircle, originally from the Netherlands.

What happened to their Outremer 55?

The original Greatcircle (Hull #4) was sold in late 2024 following the completion of their first circumnavigation.

Where is Cat Greatcircle in 2026?

As of June 2026, the crew is based in the South Pacific, exploring the Galapagos and French Polynesia.

What is their new boat?

The crew is awaiting the completion of their new Outremer 57 (Hull #1), which is optimized for high-performance voyaging.

How do they fund their travels?

Their mission is funded through digital content production, YouTube AdSense revenue, and professional consulting services.

GLYWO stands for the Grand Large Yachting World Odyssey, a global rally organized by the owners of Outremer and Garcia.

Did they sail through the Panama Canal?

Yes, the crew successfully completed their second Panama Canal transit in April 2026 as guest crew on Kairos.

Is the channel still active in 2026?

Yes, the channel remains highly active in 2026, documenting their GLYWO 25 mission and new boat build.

How fast can an Outremer 55 go?

Outremer 55s are known for extreme speed, with the crew documenting peak speeds exceeding 30 knots during their mission.

What is the boat's MMSI number?

The legacy Greatcircle transmitted under the Netherlands flag with call sign PI3523 and MMSI 244000000 (Pending).

Where did they start their journey?

They began their journey in France at the Outremer factory in La Grande Motte, launching for their first world rally.

Can I follow them on Instagram?

Yes, you can follow them at @catgreatcircle for mission updates and photography of their South Pacific voyage.

Cat Greatcircle

Sailing Greatcircle – Final sprint to La Grande Motte (ep.22)

Back on the boat again. Perfect conditions to sail from Canet-en-Roussillon to the Multihull Boat Show in La Grande Motte.

Apr 18, 2017
Language: EN
Play Time: 00:07:43

Cat Greatcircle

Sailing Greatcircle – Collioure & Cannet-en-Roussillon (ep.21)

Back in France in the magnificent town of Collioure. Afterwards we bring the boat to Canet-en-Roussillon where BMS prepares the boat for the multihull boat show in La Grande Motte (April 19-23).

Apr 14, 2017
Language: EN
Play Time: 00:05:53

Cat Greatcircle

Sailing Greatcircle – Barcelona & Costa Brava (ep.20)

Bumpy exit out of Ciutadella on Menorca towards Barcelona and the Costa Brava

Apr 07, 2017
Language: EN
Play Time: 00:09:01

Cat Greatcircle

Lagoon 52S Greatcircle – Menorca (ep.19)

Crossing from Mallorca to Mahon at the east side of Menorca and via the north to the beautiful city of Ciutadella in the west. 20.11.2017 : video got blocked on some kind of afterburner copyright claim on the Kind of Cool song; had to delete the second song, seems like the first song is automatical...

Mar 31, 2017
Language: EN
Play Time: 00:09:44

Cat Greatcircle

Lagoon 52S Greatcircle – Anchorages South of Mallorca (ep.18)

Hopping on the south coast of Mallorca including a day sail back and forth to Illa de Cabrera. Magnificent blue anchorages, sometimes a bit narrow...

Mar 24, 2017
Language: EN
Play Time: 00:10:08

Cat Greatcircle

Lagoon 52S Greatcircle – Ibiza to Mallorca (ep.17)

Great sailing conditions to continu to Mallorca. This will be Florian's final leg before he flies home to France again. Thanks again Flo for all your help.

Mar 20, 2017
Language: EN
Play Time: 00:06:46

Cat Greatcircle

Lagoon 52S Greatcircle – Windforce 10 to Ibiza (ep.16)

Right in the first couple of weeks after delivery of Greatcircle in Bordeaux the cat was tested in some challenging conditions. Flying from Gibraltar to Ibiza with over 50 knots of wind in the back. May have broken the all time speed record with a Lagoon with 27,2 knots.... Very happy to have an ex...

Mar 16, 2017
Language: EN
Play Time: 00:11:31

Cat Greatcircle

Lagoon 52S Greatcircle – Straight to Gibraltar (ep.15)

After another nice day with our friends in Alvor we continu towards Gibraltar before the storm will get there.

Mar 11, 2017
Language: EN
Play Time: 00:06:54

Cat Greatcircle

Lagoon 52S Greatcircle – Cascais to the beautiful lagoon of Alvor (ep.14)

Rounding Cabo de Sao Vicente for a stop in our favorite lagoon in the Algarve.

Mar 09, 2017
Language: EN
Play Time: 00:07:17

Cat Greatcircle

Lagoon 52S Greatcircle – Porto to Cascais (ep.13)

Nice images from the sky as we leave Porto towards the south. The first scheduled maintenance of the engines is planned for next Monday in Cascais, so we'll probably skip Lisboa and head directly there.

Mar 06, 2017
Language: EN
Play Time: 00:04:19

Cat Greatcircle

Lagoon 52S Greatcircle – Crossing Bay of Biscay to Porto (ep.12)

La Rochelle to Porto. No wind, lots of wind, and a beautiful spot on the central quay in Porto.

Mar 02, 2017
Language: EN
Play Time: 00:10:55

Cat Greatcircle

Lagoon 52S Greatcircle – Handover Bordeaux & La Rochelle ep.11

Delivery of the Greatcircle at the Lagoon factory in Bordeaux and final preparations with Nautisch Kwartier in La Rochelle.

Mar 01, 2017
Language: EN
Play Time: 00:12:29

Cat Greatcircle

Lagoon 52S Greatcircle – Bordeaux Launch ep.10

Launch of the Lagoon 52S Greatcircle at the Lagoon factory in Bordeaux

Feb 11, 2017
Language: EN
Play Time: 00:06:23

Cat Greatcircle

Greatcircle – Bonaire Kiteschool ep.9 extended

Doesn't seem smart to start using our new kite without any lessons, but the lake is frozen over completely and departure of the Greatcircle is only a couple of weeks ahead. Thanks Kjeld and Lars for your patience at Bonaire Kiteschool.

Feb 11, 2017
Language: EN
Play Time: 00:10:34

Cat Greatcircle

Greatcircle – La Rochelle ep.7b

Next to our visit to the Lagoon factory in Bordeaux we had a look in La Rochelle where we will perform all final preparations with Nautisch Kwartier before we cross the Bay of Biscay (hopefully) mid February.

Feb 10, 2017
Language: EN
Play Time: 00:03:41

Cat Greatcircle

Great Circle Bonaire Kiteschool – WatersportTV ep.9

Kite lessons on Bonaire in preparation of the lauch and departure of Greatcircle in Februari.

Feb 07, 2017
Language: EN
Play Time: 00:02:43

Cat Greatcircle

Great Circle Boot Dusseldorf – WatersportTV ep.8

Short Summary of our visit to Boat Dusseldorf by Watersport-TV.nl. In the next episode we try kitesurfing for the first time at Bonaire Kiteschool, so we hopefully get the basics before we launch Greatcircle in less than 2 weeks.

Jan 29, 2017
Language: EN
Play Time: 00:02:08

Cat Greatcircle

Search for Greatcircle – Lagoon 52S

Cannes Boat Show, test drive Lagoon 52S and a visit to the Lagoon factory in Bordeaux in search of our new catamaran after selling Lagoon 39 Breinwave.

Jan 23, 2017
Language: EN
Play Time: 00:03:50