Question 712 Rules of the Road

The correct answer is C) 3 white masthead lights. According to the International and Inland Navigation Rules, a towing vessel must display 3 white masthead lights when towing another vessel(s) astern, where the length of the tow, measured from the stern of the towing vessel to the stern of the last vessel in the tow, exceeds 200 meters. In this case, the length of the tow is 250 meters, which requires the display of 3 white masthead lights on the tugboat. The other options are incorrect because: A) 1 light is not enough for a tow this long, B) 2 lights are not sufficient, and D) 4 lights would be more than the required 3 lights.