Question 619 Rules of the Road

The correct answer is C) A stern light. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel being towed astern must show a stern light in addition to sidelights. The stern light helps indicate the direction of the towed vessel and ensures that other vessels in the area are aware of its presence and movements. The other answer choices are incorrect because: A) Not under command lights are for vessels that are unable to maneuver as required by the rules, which is not the case for a vessel being towed; B) Range lights are used to indicate the forward and aft ends of a vessel, but are not required for a towed vessel; and D) A masthead light is required for a power-driven vessel, but not for a vessel being towed.