Question 601 Rules of the Road

The correct answer is B) 2. According to the International and Inland Navigation Rules, when towing two barges astern, the tugboat must display two white towing identification lights. This is because the length of the tow from the stern of the tug to the stern of the last barge is more than 200 meters (150 meters in this case), and the Regulations require two white towing lights to be displayed on the tug. The other options are incorrect because one light (A) would not be sufficient, and three (C) or four (D) lights would be more than the required number for a tow of this length.