Question 931 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND While underway in a fog you hear a signal of three strokes of a bell, a rapid ringing of the bell, and three more strokes of the bell. Which situation would require a vessel to sound this signal?

A At anchor and giving warning
B Aground
C Not under command and at anchor
D At anchor and greater than 100 meters in length
AI Explanation

The correct answer is B) Aground. The signal you described - three strokes of the bell, a rapid ringing of the bell, and three more strokes - is the signal that a vessel that is aground must sound under both the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules. This signal alerts other vessels in the area that the vessel is aground and not under command. The other options are incorrect because they do not match the specific signal described. A vessel at anchor would sound a different signal, a vessel not under command and at anchor would sound a different signal, and a vessel over 100 meters in length at anchor would also have a different signal requirement.

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