On small passenger vessels if an item of lifesaving equipment is carried but not required __________.

Correct Answer: Option D — the equipment must be approved by the Commandant

46 CFR 117.10 mandates that any lifesaving equipment carried on board, even if it exceeds the minimum regulatory requirements, must be of an approved type. This ensures that all equipment available to passengers and crew meets the rigorous testing and performance standards established by the Coast Guard Commandant.