Question 749 Rules of the Road

The correct answer is C) an air-cushion vessel. According to the International Regulations for Preventing Collisions at Sea (COLREGS), an all-round flashing yellow light may be exhibited by an air-cushion vessel to indicate its nature and that it is not under command and unable to maneuver as required by the rules. This is specified in Rule 27(b)(i) of the COLREGS. The other options are incorrect because a vessel laying cable, a vessel not under command, and a vessel towing a submerged object would use different light signals to indicate their status and activities, as defined in the COLREGS.