Question 660 Rules of the Road

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.