Question 471 Rules of the Road

90% to pass

INTERNATIONAL ONLY Which signal is required to be sounded by a power-driven vessel ONLY?

A A signal sounded when approaching a bend.
B A signal meaning that the vessel sounding it is in doubt as to the other vessel's actions.
C A signal meaning, "I intend to overtake you on your starboard side."
D A signal meaning, "I am altering my course to starboard."
AI Explanation

The correct answer is D) A signal meaning, "I am altering my course to starboard." This is the correct answer because the International Regulations for Preventing Collisions at Sea (COLREGS) require a power-driven vessel to sound one short blast to indicate that it is altering its course to starboard. This signal helps communicate the vessel's intentions to other vessels in the area, improving navigation safety. The other answer choices are incorrect because they do not represent the specific signal required for a power-driven vessel altering course to starboard under the COLREGS.

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