What should divers always monitor to maintain safety while using Nitrox?

Monitoring oxygen levels and partial pressures is crucial for divers using Nitrox because it directly relates to the risk of oxygen toxicity. Nitrox is a gas mixture that typically contains a higher percentage of oxygen than normal air, which can increase the risk of oxygen toxicity if divers exceed the safe limits of partial pressure during their dives.

The maximum allowable partial pressure of oxygen for recreational diving is generally around 1.4 to 1.6 ATA (atmospheres absolute) depending on specific guidelines and dive conditions. By regularly checking oxygen levels and partial pressure, divers can ensure they stay within safe limits, thus minimizing the risk of adverse effects associated with elevated oxygen levels, such as central nervous system toxicity.

This careful monitoring is essential, especially during deeper dives where the partial pressure of oxygen can increase significantly, making it necessary for divers to plan their dive profiles accordingly. Understanding and managing this risk is a key aspect of safe Nitrox diving practices.