Question 671 Rules of the Road

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BOTH INTERNATIONAL & INLAND Which power-driven vessel is NOT required to carry a light in the position of the after masthead light?

A A vessel of 60 meters in length towing astern
B A vessel of 45 meters in length trolling
C A pushing vessel and a vessel being pushed, in a composite unit and 100 meters in length
D Any vessel constrained by her draft
AI Explanation

The correct answer is B) A vessel of 45 meters in length trolling. According to the International Regulations for Preventing Collisions at Sea (COLREGS), vessels of 45 meters or less in length engaged in fishing, such as trolling, are not required to carry a light in the position of the after masthead light. This is specified in Rule 23(c) of the COLREGS. The other options are incorrect because: A) Vessels towing astern are required to carry the appropriate towing lights; C) Composite units over 100 meters in length are required to carry the proper masthead lights; and D) Vessels constrained by their draft are required to display the appropriate lights and shapes.

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