Question 660 Rules of the Road

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BOTH INTERNATIONAL & INLAND Which vessel is "underway" according to the Rules?

A A pilot vessel at anchor
B A vessel made fast to a single point mooring buoy
C A vessel engaged in towing, not making way
D A vessel which has run aground
AI Explanation

The correct answer is C) A vessel engaged in towing, not making way. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel is considered "underway" when it is not at anchor, made fast to the shore, or aground. A vessel engaged in towing, even if not making way, is still considered underway and must comply with the relevant navigation rules. The other options are incorrect because: A) A pilot vessel at anchor is not underway, B) A vessel made fast to a single point mooring buoy is not underway, and D) A vessel which has run aground is not underway.

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