Which symptom indicates a risk of carbon monoxide (CO) poisoning?

Dizziness and nausea are classic symptoms of carbon monoxide (CO) poisoning. This gas is colorless, odorless, and tasteless, making it particularly dangerous on boats where proper ventilation may be limited. When individuals are exposed to CO, their bodies cannot effectively utilize oxygen, which can lead to these debilitating symptoms.

Nausea often accompanies dizziness as the body reacts to the toxic effects of CO. Recognizing these symptoms is crucial for taking immediate action, such as getting fresh air and moving away from the source of the carbon monoxide.

While extended fatigue and severe headaches can also present in certain situations of CO exposure, they are not as definitive or immediate indicators as dizziness and nausea. Alerts from the boat’s navigation system, though helpful for navigation purposes, do not relate to the physiological effects of carbon monoxide exposure.