A fireman's outfit carried onboard cargo vessels, must have a __________.

Correct Answer: Option C — self-contained breathing apparatus

46 CFR requires cargo vessels to carry self-contained breathing apparatus (SCBA) as part of the fireman's outfit. Unlike canister-type masks, SCBAs provide a reliable supply of breathable air independent of the surrounding atmosphere, which is essential for safely entering smoke-filled or oxygen-deficient compartments during firefighting operations.