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Practical guides to the COLREGS, buoyage, lights and shapes, and exam prep - written to be useful at the chart table, not just in the classroom.
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Learn the COLREGS by Ear: Introducing Listen to the Rules
The IRPCS app's new audio course reads every COLREGS rule word for word, then explains it. Here's why that helps the rules stick, and how to use it.
BuoyageIALANavigation
IALA Buoyage Regions A and B: what actually changes
Lateral marks swap colours between IALA Region A and Region B - cardinal, safe water, isolated danger and special marks do not. Here is the difference that matters, and how to keep it straight.