Question 836 Rules of the Road

The correct answer is B) two cones with apexes together. The lights shown in illustration D082RR indicate that the vessel is engaged in towing operations. According to the International and Inland Navigation Rules, a vessel engaged in towing another vessel must display two masthead lights in a vertical line and two all-round red lights in a vertical line. These lights, coupled with the shape displayed, signal to other vessels that the towing operation is taking place. The shape that must be displayed is two cones with their apexes together, as this shape is the recognized shape for a vessel engaged in towing under the International and Inland Navigation Rules.