How do ascent rates recommended for Nitrox compare to those for air?

Ascent rates for diving with Enriched Air Nitrox are generally recommended to remain consistent with those for air dives. This is because both types of gas mixtures can result in similar physiological effects on the body during ascent. However, Nitrox dives can accumulate less nitrogen in the body due to the reduced percentage of nitrogen in the gas mix, which requires divers to monitor their ascent more carefully to avoid potential issues such as oxygen toxicity or decompression sickness.

It's crucial for divers using Nitrox to adhere to the no-decompression limits and remain aware of their ascent profiles, which can differ based on the specific blend they are using and the time spent at depth. Enhanced monitoring ensures divers can manage their exposure to both nitrogen and oxygen effectively, making ascent rates a significant factor in the dive plan. Thus, although the ascent rate remains standard, the introduction of more careful monitoring is essential when using Nitrox, to protect against the unique risks associated with higher oxygen levels in these gas mixtures.