What is the standard maximum depth for diving with EANx 32?

The standard maximum depth for diving with EANx 32, or Enriched Air Nitrox with 32% oxygen, is based on the no-decompression limits and the percentage of oxygen in the gas mix. EANx 32 allows for an extended bottom time due to its lower nitrogen content compared to air, but it also comes with a limitation on depth to manage the increased partial pressure of oxygen.

The critical factor for determining the maximum depth for EANx 32 is the partial pressure of oxygen (PPO2) that divers can safely handle. For recreational diving, the maximum partial pressure of oxygen is typically set at 1.4 ATA (atmospheres absolute). At greater depths, the PPO2 increases, which can lead to oxygen toxicity.

Given that the maximum PPO2 limit is 1.4 ATA, and considering EANx 32 is composed of 32% oxygen, divers can safely reach a depth of around 33 meters (110 feet) while maintaining a PPO2 within allowable limits. This depth aligns with the safe usage guidelines established in diving training and practices.

Therefore, the correct answer reflects the safe maximum depth for diving with EANx 32 in terms of both maintaining sufficient dive time and preventing