USCG Exam Practice · Aids to Navigation — IALA-B (US) buoyage
When returning from sea in US waters, a mariner should keep nun buoys on which side of the vessel?
- APort side
- BEither side, depending on the chart
- CStarboard side✓ correct
- DDead ahead until passed
Why C is correct
Nun buoys are conical, red, even-numbered aids that mark the starboard side of the channel when returning from sea. The IALA-B 'red right returning' convention requires they be kept to starboard.
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