Where does a boat produce the highest concentration of carbon monoxide?

A boat typically produces the highest concentration of carbon monoxide (CO) in the area near the engine exhaust, particularly when idling or operating at low speeds. This is because the combustion process in gasoline engines generates CO, which can accumulate around the stern and in enclosed spaces. Additionally, poor ventilation can exacerbate CO concentrations, posing a risk to those nearby. Proper maintenance and ventilation are essential to minimize CO exposure.