Question 977 Rules of the Road

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BOTH INTERNATIONAL & INLAND A vessel aground in fog shall sound, in addition to the proper anchor signal, which of the following?

A Three strokes on the gong before and after sounding the anchor signal
B One prolonged and one short blast on the whistle
C Four short blasts on the whistle
D Three strokes on the bell before and after the anchor signal
AI Explanation

The correct answer is D) Three strokes on the bell before and after the anchor signal. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel aground in fog must sound the proper anchor signal, which is one prolonged blast followed by two short blasts, in addition to sounding three strokes on the bell before and after the anchor signal. This combination of signals alerts other vessels in the vicinity that the grounded vessel is unable to maneuver. The other options are incorrect because they do not match the specific sound signal requirements for a vessel aground in fog as per the COLREGS and Inland Navigation Rules.

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Official Resources
USCG Navigation Rules (COLREGS) 33 CFR Navigation Rules USCG Navigation Center
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