Power Routing for Comfort (PredictWind Masterclass 3/5)
Think your engine solves bad weather? Think again. In this third video of our 5-part intensive, we are breaking down the physics of offshore motion. Whether you are on a sailboat or a dedicated powerboat, understanding how energy is transferred from the ocean to your hull is the difference between a controlled passage and an exhausting disaster.
We move past simple wave height and dive into the "invisible" factors—like wave period and vertical acceleration—that shock load your equipment and wear out your crew long before the wind picks up.
📘 GET THE BOOK & SAVE $100
This masterclass is based on the principles in my book "Be The Captain." Every reader gets a 20% discount on PredictWind Standard or Pro subscriptions (saving you up to $100).
👉 Get the book and your discount here: https://bethecaptain.com/
⚓️ WHAT YOU WILL LEARN IN VIDEO #3:
We are shifting focus from "finding a line" to understanding the physics of your boat's motion. This session covers:
* The Energy Trap: Why short-period waves are more dangerous than large, long-period swells.
* Engine vs. Sail Physics: Why engines can be more punishing in bad seas because they don't naturally "shed" load like a reefed sail.
* Vertical Acceleration: The "pro metric" for predicting fatigue, seasickness, and gear failure.
* Directional Impact: How head seas, beam seas, and quartering seas affect your fuel burn and structural loading.
* Setting Realistic Assumptions: Why your "flat water" speed is the wrong number to use for routing.
* Continuous Decision Making: My routine for rerunning routes every 12 hours as conditions evolve.
⚖️ TECHNICAL DISCLOSURE & TRANSPARENCY
This series is supported by PredictWind, who provided the hardware and professional editing for these videos. I receive no cash payment and maintain 100% editorial control. I’m sharing these tools because I trust them with my life and want you to have the best safety information available.
📽️ THE PREDICTWIND MASTERCLASS SERIES:
Video 1: The Foundation & Setup
https://youtu.be/JTJTCXnd8e0
Video 2: Weather Routing & Interpretation
https://youtu.be/S1DvOBNulFU
Video 3: Power Routing for Comfort (You are here)
https://youtu.be/QTrIFfbL6VY
Video 4: Safety, AIS & Extra Features
https://youtu.be/C5zBfqqwDMM
Video 5: The Offshore App & Starlink Integration
Video Chapters
* 00:00 Why This Video is for Sailboats Too
* 00:43 The Physics of Bad Seas: Energy vs. Height
* 01:13 The Danger of Short Period Waves
* 01:47 How Wave Direction Affects Your Boat
* 02:28 The Problem with Engines in Heavy Weather
* 03:32 Power Routing Setup & Assumptions
* 04:30 Map vs. Reality: Finding the Real Info
* 05:01 Using Graphs to Spot Short Period Energy
* 05:16 The Summary Table & Comfort Metrics
* 05:34 The 12-Hour Update: Continuous Seamanship
* 06:11 Final Advice: Understanding Risk and Timing
#Sailing #PredictWind #PowerRouting #OffshoreSailing #BeTheCaptain #Seamanship #BoatSafety #WeatherForecasting #SailingZingaro
Sailing Zingaro
Join James Evenson of Sailing Zingaro as he documents his 2026 technical refit of his Crowther Spindrift 38 in Colombia and his 'Sailing Truth' mission.
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Think your engine solves bad weather? Think again. In this third video of our 5-part intensive, we are breaking down the physics of offshore motion. Whether you are on a sailboat or a dedicated powerboat, understanding how energy is transferred from the ocean to your hull is the difference between a controlled passage and an exhausting disaster.
We move past simple wave height and dive into the “invisible” factors—like wave period and vertical acceleration—that shock load your equipment and wear out your crew long before the wind picks up.
📘 GET THE BOOK & SAVE $100
This masterclass is based on the principles in my book “Be The Captain.” Every reader gets a 20% discount on PredictWind Standard or Pro subscriptions (saving you up to $100).
👉 Get the book and your discount here: https://bethecaptain.com/
⚓️ WHAT YOU WILL LEARN IN VIDEO #3:
We are shifting focus from “finding a line” to understanding the physics of your boat’s motion. This session covers:
* The Energy Trap: Why short-period waves are more dangerous than large, long-period swells.
* Engine vs. Sail Physics: Why engines can be more punishing in bad seas because they don’t naturally “shed” load like a reefed sail.
* Vertical Acceleration: The “pro metric” for predicting fatigue, seasickness, and gear failure.
* Directional Impact: How head seas, beam seas, and quartering seas affect your fuel burn and structural loading.
* Setting Realistic Assumptions: Why your “flat water” speed is the wrong number to use for routing.
* Continuous Decision Making: My routine for rerunning routes every 12 hours as conditions evolve.
⚖️ TECHNICAL DISCLOSURE & TRANSPARENCY
This series is supported by PredictWind, who provided the hardware and professional editing for these videos. I receive no cash payment and maintain 100% editorial control. I’m sharing these tools because I trust them with my life and want you to have the best safety information available.
📽️ THE PREDICTWIND MASTERCLASS SERIES:
Video 1: The Foundation & Setup
Video 2: Weather Routing & Interpretation
Video 3: Power Routing for Comfort (You are here)
Video 4: Safety, AIS & Extra Features
Video 5: The Offshore App & Starlink Integration
Video Chapters
* 00:00 Why This Video is for Sailboats Too
* 00:43 The Physics of Bad Seas: Energy vs. Height
* 01:13 The Danger of Short Period Waves
* 01:47 How Wave Direction Affects Your Boat
* 02:28 The Problem with Engines in Heavy Weather
* 03:32 Power Routing Setup & Assumptions
* 04:30 Map vs. Reality: Finding the Real Info
* 05:01 Using Graphs to Spot Short Period Energy
* 05:16 The Summary Table & Comfort Metrics
* 05:34 The 12-Hour Update: Continuous Seamanship
* 06:11 Final Advice: Understanding Risk and Timing
#Sailing #PredictWind #PowerRouting #OffshoreSailing #BeTheCaptain #Seamanship #BoatSafety #WeatherForecasting #SailingZingaro
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