Question 493 Rules of the Road

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BOTH INTERNATIONAL & INLAND While underway in fog you hear the rapid ringing of a bell. What does this signal indicate?

A A vessel drifting
B A vessel backing down
C A sailboat underway
D A vessel at anchor
AI Explanation

The correct answer is D) A vessel at anchor. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel at anchor is required to ring its bell rapidly for about 5 seconds at intervals of not more than 1 minute. This signal indicates that the vessel is at anchor and not underway. The rapid ringing of a bell does not apply to a vessel drifting, backing down, or a sailboat underway, which is why the other options are incorrect.

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