How can you protect against carbon monoxide poisoning on a boat?

To protect against carbon monoxide poisoning on a boat, ensuring proper ventilation and avoiding idling in confined spaces is essential. Carbon monoxide is a colorless, odorless gas that can accumulate to dangerous levels in enclosed or poorly ventilated areas, particularly when a boat's motor or generator is running. By maintaining good airflow and avoiding situations where exhaust fumes can build up, such as running the engine in a small cabin or tied up in a slip without ventilation, you minimize the risk of carbon monoxide exposure. This proactive approach is crucial for safety while boating.

Other options, such as keeping all windows closed, using the boat's generator constantly, or only operating during daylight, do not effectively address the dangers of carbon monoxide. Keeping windows closed would restrict ventilation, exacerbating the risk, while using a generator without proper ventilation can lead to a buildup of the gas. Operating only during daylight does not inherently reduce the risk of carbon monoxide exposure, as the gas can be present regardless of the time of day. Thus, option A is the comprehensive solution to protecting against carbon monoxide poisoning on a boat.