You are preparing to load fuel oil on a vessel of 300 gross tons constructed after June 30, 1974. Before loading, you must check that the fuel oil tank vents __________.

Correct Answer: Option D — have containment capacity for at least one half barrel

46 CFR 35.35-20 requires fuel oil tank vents on vessels of this size and vintage to be equipped with a containment device capable of holding at least one-half barrel of oil. This prevents accidental spills during bunkering from reaching the deck or overboard, ensuring environmental compliance during transfer operations.