Question 719 Rules of the Road

The correct answer is C) Flashing yellow light. According to the International Regulations for Preventing Collisions at Sea (COLREGS), an air-cushion vessel operating in the non-displacement mode is required to exhibit, in addition to the steady white light, a flashing yellow light. This flashing yellow light helps identify the vessel as an air-cushion vessel not operating in the normal displacement mode, which is important information for the overtaking vessel "A" to have. The other answer choices are incorrect because a flashing red light is used for vessels not under command, a steady green light is used for the sidelights of a vessel, and a flashing white light is not a required light for an air-cushion vessel operating in the non-displacement mode.