What is a potential risk of diving with incorrect Nitrox percentages?

Diving with incorrect Nitrox percentages can lead to an increased likelihood of central nervous system (CNS) toxicity. This condition arises primarily from exposure to higher partial pressures of oxygen than the body can safely handle. Nitrox blends contain varying levels of oxygen, and a higher percentage increases the risk of CNS effects, especially when divers ascend rapidly or exceed the maximum operational depth for that mix.

When the partial pressure of oxygen in the breathing gas exceeds a certain threshold, typically around 1.4 to 1.6 ATA (atmospheres absolute), divers may experience symptoms like visual disturbances, seizures, or other neurological effects. This is particularly crucial to monitor during deep dives or extended exposures to high oxygen environments where the chance of toxicity rises.

By understanding the risks associated with incorrect Nitrox percentages, divers can make informed decisions about their mixes, develop appropriate dive plans, and adhere to safe diving practices to mitigate risks effectively. The focus on CNS toxicity emphasizes the importance of proper gas management and dive training to avoid serious hazards during diving activities.