How can you reduce the risk of carbon monoxide poisoning on a boat?

• A. Keep doors sealed and run engines in enclosed spaces
• B. Run generators indoors
• C. Close all vents to starve CO
• D. Ensure adequate ventilation of cabins and compartments and avoid running engines or generators in enclosed spaces

Answer: (D)

Carbon monoxide is a colorless, odorless gas produced by burning fuel in engines, generators, and other equipment. On a boat, confined cabins and compartments can trap CO, so simply closing doors or running equipment in enclosed spaces can quickly lead to dangerous exposure. The safest and most effective way to reduce the risk is to ensure adequate ventilation of all cabins and compartments and to avoid operating engines or generators in enclosed spaces. Keep vents and exhaust outlets clear, open hatches or ventilators to promote air exchange, and consider a CO detector to provide early warning. Closing vents, sealing doors, or running equipment indoors all increase the danger by limiting ventilation and allowing CO to accumulate.