Question 428 Rules of the Road

90% to pass

INTERNATIONAL ONLY Which lights shall a single vessel being towed alongside show?

A A masthead light, sidelights, and a stern light
B Only the outboard sidelight and a stern light
C Sidelights and a stern light
D One all-round white light
AI Explanation

The correct answer is C) Sidelights and a stern light. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a single vessel being towed alongside is required to show sidelights and a stern light. This is specified in Rule 24(b) of the COLREGS, which states that "a vessel being towed shall exhibit the sidelights and a sternlight." The other options are incorrect because A) a masthead light is not required for a vessel being towed alongside, B) showing only the outboard sidelight and a stern light is not sufficient, and D) a single all-round white light does not meet the lighting requirements for a vessel being towed.

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