Air-cooled gasoline auxiliary engines are allowed on vessels not more than 65 feet in length, carrying not more than 12 passengers if __________.

Correct Answer: Option A — they have a self-contained fuel system and are installed on an open deck

Air-cooled gasoline auxiliary engines are permitted on small passenger vessels under 65 feet only if they have a self-contained fuel system and are installed on an open deck. This prevents the accumulation of flammable vapors in enclosed spaces, significantly reducing the risk of fire or explosion.