When a diver descends into a body of water, they experience different sensations as they dive deeper. One of these sensations is narcosis.

Narcosis, also known as nitrogen narcosis, is a condition where divers experience a decrease in their cognitive ability and decision-making skills due to the increased pressure and gas mixture they are breathing in.

In this illustrated guide, we will explore what narcosis is, how it affects divers, and ways to prevent and manage this condition.

What Causes Narcosis?

Narcosis is caused by breathing in gases that have a high concentration of nitrogen. As divers descend deeper, the partial pressure of nitrogen increases, which leads to narcosis.

It is important to note that other gases, such as helium or hydrogen, can also cause narcosis at extreme depths.

How Does Narcosis Affect Divers?

Narcosis can affect divers in many ways, including:.

Impaired cognitive ability and decision-making skills
Decreased reaction time
Difficulty concentrating and focusing on tasks
Feeling intoxicated or drunk
Decreased coordination

These effects can be dangerous, especially when diving in deep water or areas with strong currents or low visibility. Divers might not realize that their cognitive abilities are impaired until they try to complete a task and fail.

Symptoms of Narcosis

It is essential to recognize the symptoms of narcosis to prevent accidents. Some of the most common symptoms include:.

Feeling euphoric or giddy
Feeling disoriented or confused
Difficulty remembering or following instructions
Changes in vision
Hallucinations

Different divers can experience different symptoms, depending on their sensitivity to narcosis and the depth they are diving.

How to Prevent Narcosis

The best way to prevent narcosis is to monitor your dive depth and the gas mixture you are breathing in. Divers should also avoid diving when they are tired, stressed, or under the influence of alcohol or drugs.

Special training and certifications, such as the Advanced Open Water certification, can prepare divers for the effects of narcosis and help them make informed decisions while diving.

How to Manage Narcosis

If a diver suspects they are experiencing narcosis, they should ascend to a shallower depth immediately. The symptoms of narcosis can disappear quickly once a diver is at shallower depths.

If a diver cannot ascend due to decompression obligations or other reasons, they should alert their dive buddy or the dive leader and stay calm.

Some divers use oxygen as a management technique for narcosis. However, oxygen should not be used as a substitute for proper dive planning, gas management, and training.

The Importance of Professional Training

As mentioned earlier, professional training and certifications can prepare divers for the effects of narcosis and help them make informed decisions while diving.

Proper training can also help divers recognize the symptoms of narcosis and take appropriate action, such as ascending to shallower depths.

It is important to choose a reputable dive center or instructor when seeking training. Divers should also research and read reviews from previous students to ensure the quality of the training they will receive.

In Conclusion

Narcosis can be a scary condition for divers, but it is preventable and manageable with proper training, planning, and awareness.

Remember to monitor your dive depth and gas mixture, recognize the symptoms of narcosis, and take appropriate action if needed. With the right preparations, you can enjoy your dives and explore the underwater world safely.