Question 595 Rules of the Road

The correct answer is D) under oars. The illustration D080RR shows a single red light, which according to the International Regulations for Preventing Collisions at Sea (COLREGS) indicates a vessel under oars. This is because a vessel under oars does not have the ability to maneuver as freely as a powered vessel, so the red light helps other vessels identify and avoid it. The other answer choices are incorrect because they represent different types of vessels with different light configurations. A vessel not under command would display different lights, a fishing vessel would have additional green and/or white lights, and a towing vessel would have a different arrangement of lights.