BOTH INTERNATIONAL & INLAND Which identifier lights and or shapes is a vessel, which is unable to maneuver due to some exceptional circumstance required to exhibit?

Correct Answer: Option C — when making way at night, two all-round red lights, sidelights, and a stern light

Rule 27(a) requires a vessel not under command (NUC) to display two all-round red lights in a vertical line at night. When making way through the water, she must also exhibit sidelights and a sternlight to indicate her movement to other vessels in the vicinity.