Which is the best precaution against carbon monoxide poisoning?

The best precaution against carbon monoxide poisoning is to use a carbon monoxide detector. This device is specifically designed to alert individuals to the presence of carbon monoxide, which is an odorless, colorless gas that can be extremely dangerous. A detector can continuously monitor the air quality and provide early warnings, allowing occupants to evacuate and seek fresh air before symptoms of poisoning develop.

While keeping air flowing through a vessel is helpful in reducing the concentration of carbon monoxide, it does not provide the proactive safety feature of a detector that can warn of dangerous levels. Monitoring engine performance is crucial for overall vessel safety but does not directly address the risks of carbon monoxide exposure. Limiting engine running time may reduce the risk of buildup but does not offer the immediate protection that a detector provides. Therefore, using a carbon monoxide detector stands out as the most effective and preventative measure against carbon monoxide poisoning.