What type of ventilation system must a inboard gasoline boat have?

An inboard gasoline boat must have a ventilation system that includes both natural and powered ventilation to ensure the safe removal of potentially explosive fuel vapors. This typically involves at least two air intakes and two exhaust outlets to promote adequate airflow in the engine compartment. The system should be designed to operate automatically, activating when the engine is running or when the boat is at rest, to minimize the risk of ignition from accumulated vapors. Regular maintenance and checks are essential to ensure the system is functioning properly.