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Lateral marks

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.

BuoyageLateral marksIALAExam prepSeamanship

Lateral Marks: Which Side Do You Leave Them On?

Region A or B, port hand or starboard hand - lateral marks confuse even experienced skippers. Here's how to read them correctly every time.

26 October 2026 · 7 min read