Question 518 Rules of the Road

The correct answer is D. The reason D is the correct answer is that when fishing gear extends more than 150 meters horizontally from the vessel, the International and Inland Navigation Rules require displaying two all-round red lights in a vertical line to indicate the presence of the outlying gear. This is specified in Rule 26(c) of the Navigation Rules. The other answer choices (A, B, and C) represent different shapes or lights that are not the appropriate signal for a vessel with outlying fishing gear extending more than 150 meters. The two vertical red lights in choice D specifically denote the presence of the extended fishing gear as per the Navigation Rules.