Question 731 Rules of the Road

90% to pass

BOTH INTERNATIONAL & INLAND A 30-meter tug is underway and NOT towing. At night, this vessel must show sidelights and which additional light(s)?

A a stern light ONLY
B one masthead light and a stern light
C three masthead lights and a stern light
D two masthead lights and a stern light
AI Explanation

The correct answer is A) a stern light ONLY. According to the International and Inland Navigation Rules, a vessel 30 meters or more in length, when underway and not towing, must exhibit sidelights and a stern light. The vessel is not required to display any additional masthead lights under these circumstances. The other answer choices, which include one or more masthead lights, are incorrect as they do not match the specific lighting requirements for a 30-meter tug that is underway and not towing.

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