What maximum depth can a diver use EAN32 with the adjusted maximum dive time provided?

The maximum depth a diver can safely use EAN32 (Enriched Air Nitrox 32) is determined by factors such as the oxygen exposure limits and the corresponding no-decompression limits for that mix of gas. EAN32 contains 32% oxygen and 68% nitrogen, which allows for extended bottom times compared to air but also requires careful management of exposure to oxygen to avoid toxicity.

When diving with EAN32, the maximum operating depth is typically calculated by considering the partial pressure of oxygen (PPO2) that the diver would experience at that depth. The acceptable PPO2 limit is usually set around 1.4 ATA (atmospheres absolute). To find the maximum depth, you can use the formula:

Maximum Depth (in meters) = (PPO2 limit / Fraction of Oxygen) - 10.

For EAN32:

1.4 ATA / 0.32 (fraction of oxygen) = 4.375 ATA, which, when converted to depth, results in about 30 meters.

Furthermore, 23 msw is a depth that provides a substantial margin for safety, as it is below the maximum safe working depth established for EAN32, allowing for longer no-decompression limits. Therefore,