Question 856 Rules of the Road

The correct answer is C) A vessel not under command. A vessel not under command is a vessel that is unable to maneuver as required by the rules due to some exceptional circumstance, such as being disabled or not under control. According to the International Regulations for Preventing Collisions at Sea (COLREGS), a vessel not under command is required to display two all-round red lights in a vertical line, rather than the typical white masthead lights. This ensures that other vessels can identify it as a vessel not under command and take the appropriate action to avoid a collision. The other options are incorrect because a mineclearing vessel (A) would display the appropriate navigation lights, a trawling vessel (B) would display side lights and a stern light, and a vessel restricted in her ability to maneuver (D) would display the appropriate lights for that situation.