INTERNATIONAL ONLY What is the minimum fog signal required aboard a vessel between 12 meters and 20 meters in length at anchor?

rapid ringing of the bell for 10 seconds every minute

one short, one long, one short stroke of the bell every minute

three separate and distinct strokes of the bell every two minute

Any efficient sound signal every two minutes ✓ Correct Answer

USCG NMC Regulatory Explanation

Under Rule 30, an anchored vessel exhibits an all-round white light forward (and aft if 50m+) by night, and one black ball forward by day.

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