Navy Dive Manual Test 2025 – 400 Free Practice Questions to Pass the Exam

Nitrogen narcosis is a condition that divers may experience when descending to depths typically beyond 30 meters (100 feet), where the partial pressure of nitrogen increases. In this state, the nitrogen dissolved in the body's tissues can have an anesthetic effect on the brain, leading to impaired cognitive function. This results in altered judgment and behavior, similar to the effects of alcohol intoxication.

Divers experiencing nitrogen narcosis may become euphoric, overly confident, or exhibit poor decision-making skills, which can pose significant dangers while underwater. These altered mental states can prevent a diver from recognizing hazards, responding appropriately to emergencies, or even adhering to safety protocols. The risk lies not only in the immediate effects on judgment but in the potential to overlook vital safety measures, leading to an increased likelihood of accidents or diving incidents.

Other potential choices may relate to physical symptoms or conditions that, while serious, do not directly stem from the cognitive effects associated with nitrogen narcosis. Therefore, altered judgment and behavior is key to understanding the significant risk of this diving condition.