Which statement is TRUE concerning the ventilation of engine and fuel tank compartments on uninspected towing vessels using fuel with a flash point of 100°F?

Correct Answer: Option C — At least one exhaust duct shall extend from the open atmosphere to the lower portion of the bilge.

Title 46 CFR ventilation requirements for uninspected towing vessels utilizing lower flashpoint fuels dictate that bilge accumulation hazards must be directly addressed. At least one exhaust ventilation duct must extend from the open atmosphere directly down to the lower portion of the bilge to effectively exhaust heavy hydrocarbon vapors.