BOTH INTERNATIONAL & INLAND At night, a vessel shall indicate that she is restricted in her ability to maneuver by showing in a vertical line two __________.

Correct Answer: Option B — red lights with a white light in between

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.