Aboard small passenger vessels which type(s) of ventilation must be provided for enclosed spaces containing gasoline engines or gasoline fuel tanks?

Correct Answer: Option C — Natural supply and mechanical exhaust

46 CFR 182.460 requires that enclosed spaces containing gasoline engines or tanks be equipped with a natural supply ventilation system and a mechanical exhaust system. This combination ensures a continuous, forced removal of potentially explosive vapors while maintaining a steady supply of fresh air to the compartment.