INLAND ONLY You are on a vessel that the Secretary has determined cannot comply with the spacing requirement for masthead lights. What is required in this situation?

Correct Answer: Option A — The vessel's lights must comply as closely as possible.

Under Rule 27(b), a vessel Restricted in Ability to Maneuver (RAM) exhibits Red-White-Red all-round lights in a vertical line by night, and Ball-Diamond-Ball shapes by day.