Question 628 Rules of the Road

The correct answer is D) with propelling machinery in use. The term "power-driven vessel" refers to a vessel that is using its propelling machinery, regardless of the vessel's speed or the current. This definition is consistent with the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, which govern the operation of vessels on U.S. waters. The other options are incorrect because they do not accurately define a power-driven vessel. Option A is incorrect because a vessel's speed relative to the current is not a factor in determining if it is power-driven. Option B is incorrect because a vessel with propelling machinery onboard, but not in use, would not be considered a power-driven vessel. Option C is incorrect because a vessel's speed compared to the current is not the defining characteristic of a power-driven vessel.