PADI Advanced Open Water Practice Exam

Gas narcosis, often referred to as nitrogen narcosis, occurs when divers breathe in nitrogen at increased pressures, typically at depths greater than 30 meters (approximately 100 feet). The effects can mimic alcohol intoxication, leading to a range of behaviors that are out of character for the diver. One common sign of this narcosis includes inappropriate behavior. This can manifest as uncharacteristic actions, such as poor decision-making, disregard for safety protocols or dive plans, or an inability to communicate effectively.

In contrast, increased alertness, clear communication, and the ability to follow the dive plan are indicative of a diver who is functioning well. When a diver is experiencing gas narcosis, their cognitive function is impaired, which can lead to a disconnection from the dive environment and a failure to adhere to established protocols. Recognizing these signs is crucial for ensuring safety during dives, as it signals that the diver may not be fit to proceed. This understanding emphasizes the importance of monitoring oneself and fellow divers for any signs of narcosis during deep dives.