At a depth of 35 meters with Nitrox 32, what is the approximate no-decompression limit (NDL)?

When diving with Nitrox 32 (which is 32% oxygen and 68% nitrogen), the no-decompression limit (NDL) at a given depth is influenced by the partial pressures of nitrogen and oxygen in the breathing gas. At 35 meters, the total pressure is significantly higher than at sea level, which increases the partial pressure of these gases in the diver's body.

For Nitrox mixes, the lower nitrogen content compared to standard air allows divers to extend their no-decompression limits. At 35 meters, a diver breathing Nitrox 32 can typically stay longer without the risk of decompression sickness, as Nitrox reduces the amount of nitrogen taken up by the body. However, NDL is a function of both depth and the specific Nitrox mix being used.

The approximate no-decompression limit for a Nitrox 32 dive at 35 meters is indeed 25 minutes. This limit is established based on dive tables or dive computers that account for the gas's nitrogen absorption characteristics at that specific partial pressure. The 25 minutes provides a safety margin for nitrogen loading, considering the higher pressures encountered at that depth.

This understanding is crucial for divers to plan their dives safely, ensuring they remain within NDL limits to avoid the