Question 642 Rules of the Road

The correct answer is D) By day, she would show the same shapes as a vessel restricted in her ability to maneuver. This is correct because under the International Regulations for Preventing Collisions at Sea (COLREGS), a towing vessel that is unable to keep out of the way of another vessel due to the nature of its work is considered a "vessel restricted in her ability to maneuver." As such, it would be required to display the same shapes as a vessel restricted in her ability to maneuver, which is two black balls in a vertical line. The other options are incorrect because they do not accurately represent the lighting and shapes required for a towing vessel that is restricted in her ability to maneuver. Option A would be for a vessel not under command, and options B and C would be for different vessel types.