At what depth does nitrogen narcosis typically occur?

Nitrogen narcosis is a physiological condition that divers may experience when they descend to significant depths, typically associated with the increasing partial pressure of nitrogen in the breathing gas. This phenomenon generally starts to affect divers at depths greater than 30 meters (100 feet). At this depth, the partial pressure of nitrogen increases sufficiently to produce intoxicating effects, which can impair cognitive function, judgment, and motor coordination, similar to the effects of alcohol.

As divers go deeper, the risk of narcosis increases, which can lead to serious safety concerns if not managed properly. It is important for divers to be aware of the signs of narcosis and to understand that their abilities to respond to emergencies may be compromised at these depths. Awareness and proper training can help in mitigating the effects of nitrogen narcosis.

While nitrogen narcosis can begin at depths shallower than 30 meters for some individuals, the commonly accepted threshold where divers should become particularly cautious is indeed at or beyond this 30-meter mark. This understanding is crucial for ensuring safe diving practices and preparing divers for the physiological challenges they may face as they explore deeper underwater environments.