BOTH INTERNATIONAL & INLAND At night, which lights shall a vessel exhibit to indicate that she is restricted in her ability to maneuver?

Correct Answer: Option D — two red lights with a white light in between in a vertical line

Rule 27(b)(i) dictates that a vessel restricted in her ability to maneuver, except for those engaged in mine clearance, must exhibit three lights in a vertical line where the highest and lowest are red and the middle light is white. This configuration warns other vessels of the restricted maneuverability.