PADI Open Water Diver Practice Exam 2025 - Free Diving Practice Questions and Study Guide

Nitrogen narcosis is a condition that affects divers when they descend to significant depths, typically deeper than about 30 meters (100 feet). As divers go deeper, the pressure increases, causing nitrogen from the breathing gas to dissolve into the bloodstream at higher concentrations. When this occurs, the nitrogen can have a narcotic effect on the nervous system, leading to symptoms such as impaired judgment, euphoria, confusion, and decreased motor skills. This altered mental state can potentially result in risky behavior or poor decision-making while diving.

Understanding nitrogen narcosis is vital for divers since it can severely impact their safety and ability to respond to underwater situations. Recognizing its symptoms and effects can help divers manage depth limits and enhance safety measures during dives.