Inboard gasoline boats built after July 31st 1981 must have what kind of ventilation system?

Inboard gasoline boats built after July 31, 1981, must have a ventilation system that includes at least two vents, one for intake and one for exhaust, to ensure proper ventilation of the engine compartment. This system is designed to prevent the accumulation of explosive fumes by allowing fresh air to circulate while expelling potentially hazardous vapors. The ventilation must be effective and comply with the standards set by the United States Coast Guard (USCG).