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Sound signals

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.

COLREGS rulesNarrow channelSeamanshipExam prepSound signals

Rule 9 Narrow Channels: What Every Skipper Must Know

Rule 9 governs narrow channels for all vessels. Here is what keeping starboard, 'shall not impede', and overtaking signals mean in practice.

16 October 2026 · 9 min read
Exam prepCOLREGS rulesNavigation lightsSound signalsDay skipper

RYA Day Skipper Theory: The COLREGS You'll Actually Be Tested On

Which COLREGS rules dominate the Day Skipper theory exam, the traps that catch candidates out, and a practical 4-week prep plan.

31 August 2026 · 8 min read
Sound signalsCOLREGS rulesRule 34Fog signalsExam prep

Sound Signals Every Skipper Must Know: 1 Blast to 5

From one short blast to five, here is what COLREGS Rules 34 and 35 actually require - and where US Inland rules catch skippers out.

10 June 2026 · 8 min read
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