Question 790 Rules of the Road

The correct answer is C) sidelights and a stern light. According to the International Regulations for Preventing Collisions at Sea (COLREGS) and the Inland Navigation Rules, a vessel being towed astern of another vessel must show the same navigation lights as a power-driven vessel underway, which includes sidelights and a stern light. This allows other vessels to clearly identify the towed vessel's presence, size, and direction of travel. The other options are incorrect because A) a stern light only would not provide sufficient visibility, B) only the required masthead lights would not indicate the presence of the towed vessel, and D) the full set of lights required for a power-driven vessel underway is not necessary for a vessel being towed.