Colregs for Ocean Skippers
Master the International Regulations for Preventing Collisions at Sea with a focus on sailing vessel dynamics, IALA Region A buoyage, and the specific requirements for SAMSA and RYA offshore certifications.
Like Duolingo, but for Colregs for Ocean Skippers. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
A deep dive: 33 levels across 6 sections, about 66 minutes end to end, roughly 13 days at five minutes a day. It moves through Immediate Action and Risk Assessment; Sailing Vessel Dynamics and Encounters; Lights, Shapes, and Night Navigation; Restricted Visibility and Sound Signals; IALA Buoyage and Coastal Navigation; and Legal Responsibility and Local Application. It assumes you already know the basics.
Free forever · No credit card · iPhone & Android
Key ideas in Colregs for Ocean Skippers
- A steady compass bearing indicates you are on a collision course
- Decreasing range means the other vessel is physically getting closer
- Hand-bearing compasses provide more accuracy than 'lining up' with a shroud
- A static bearing over time confirms a risk of collision under Rule 7
- The 'Constant Bearing, Decreasing Range' rule as the primary visual test
- Using a hand-bearing compass to verify risk
- Rule 7(c) forbids making assumptions based on scanty radar information
- CPA measures the physical gap between vessels at their nearest pass
- Intermittent signals may represent small vessels or buoys in high clutter
- TCPA helps prioritize which approaching vessel requires immediate action
- Calculating CPA and TCPA using electronic aids
- Small craft disappear in the troughs between large ocean waves
- Vessel motion makes taking an accurate compass bearing extremely difficult
- Why 'scanty' information cannot be used to assume safety
- Rule 7 requires using 'all available means' when visual data is patchy
- Small bearing changes for large vessels at close range still imply risk
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives Colregs for Ocean Skippers the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why do experienced skippers prefer a hand-bearing compass over simply 'lining up' a target with a part of the boat's rigging?
Get it right to open this lesson and 32 more in the app.
Where Colregs for Ocean Skippers takes you
- 1
Immediate Action and Risk Assessment
- Determining Risk of Collision
- Action to Avoid Collision
- 2
Sailing Vessel Dynamics and Encounters
- Sailing vs. Sailing Encounters
- The Hierarchy of Privilege
- 3
Lights, Shapes, and Night Navigation
- Sailing Vessel Light Configurations
- Identifying Specialized Vessels by Night
- 4
Restricted Visibility and Sound Signals
- Conduct in Restricted Visibility
- Sound Signals for Maneuvering and Warning
- 5
IALA Buoyage and Coastal Navigation
- IALA Region A: Lateral and Cardinal Marks
- Isolated Dangers and New Hazards
- 6
Legal Responsibility and Local Application
- The General Prudential Rule
6 sections · 11 units · 33 levels. Built to play, not to enroll.
Tomo is in ChatGPT
Tomo is also a ChatGPT plugin: the same playable courses, built and played inside your chat.
Add Tomo to ChatGPT- What to ask
- “Make me a Tomo course on black holes.” “Turn this chat into a Tomo course.”
- What you get
- Quick questions with instant feedback, hearts and stars, ready to play in about a minute.
- Where it goes
- No sign-up to start. Connect your Tomo account and your streak carries on in the app.
You pick the voice
Colregs for Ocean Skippers is taught in the Professor style: clear, structured, thorough. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start Colregs for Ocean Skippers today.
Download Tomo, search Colregs for Ocean Skippers, and play your first lesson in under a minute.