BOTH INTERNATIONAL & INLAND The rules require that a stand-on vessel SHALL take action to avoid collision when she determines that __________.

Correct Answer: Option A — collision cannot be avoided by the give-way vessel's maneuver alone

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.