When the machinery spaces on a tank vessel are protected by a fixed foam extinguishing system, what additional protection is required by Coast Guard Regulations (46 CFR) outside of the machinery space entrance?

Correct Answer: Option B — Two fire hydrants with hose, nozzle and applicator

46 CFR 95.17-25 mandates that tank vessels with machinery spaces protected by fixed foam systems must have two fire hydrants with hoses, nozzles, and applicators located immediately outside the machinery space entrance. This provides essential backup firefighting capability for personnel entering the space or managing the fire perimeter.