What are the signs of nitrogen narcosis?

Nitrogen narcosis, often described as "the rapture of the deep," occurs when divers are exposed to increased levels of nitrogen while diving at depths typically greater than 30 meters (100 feet). The physiological effects of nitrogen at these depths can lead to alterations in mental state, making the signs of impaired judgment, dizziness, and euphoria particularly prominent.

Impaired judgment manifests as a diminished ability to make sound decisions, which can lead to unsafe diving behaviors. Dizziness may occur as a result of the impact of nitrogen on the nervous system, affecting balance and orientation. Euphoria is a notable characteristic of nitrogen narcosis, which can lead divers to underestimate risks or feel overly confident, further emphasizing the importance of understanding and recognizing these signs.

While other options might suggest symptoms that could occur in divers, they do not accurately describe the specific effects of nitrogen narcosis. It is crucial for divers to be aware of these signs as they indicate critical changes in mental function that could lead to dangerous situations underwater.