How many ventilation ducts must gasoline-powered vessels have that could entrap fumes?

Gasoline-powered vessels must have at least two ventilation ducts to ensure proper air circulation and to minimize the risk of fumes accumulating in enclosed spaces. The purpose of these ducts is to allow fresh air in and facilitate the removal of potentially dangerous vapors, which can be highly flammable and pose a significant safety hazard. Having two ducts helps maintain effective ventilation, providing redundancy in case one duct becomes clogged or blocked, thereby reducing the likelihood of an explosion or fire.

Inadequate ventilation, on the other hand, could lead to the concentration of flammable fumes, making it extremely important for vessels that use gasoline as fuel to follow the regulations that stipulate the number of ducts required. This design aspect is crucial in maintaining safety standards on the water.