What must EANx divers consider when planning their dive profile?

When planning a dive profile, EANx divers must primarily consider the higher oxygen component and its effects. Enriched Air Nitrox (EANx) not only increases the percentage of oxygen in the breathing mix but also alters the dynamics of how the body absorbs and processes oxygen. Higher oxygen levels can reduce the risk of nitrogen narcosis and extend no-decompression limits, but they also come with the risk of oxygen toxicity, particularly at greater depths. By understanding and planning around these effects, divers can set maximum operating depths that are safe and ensure that their dive remains within the limits of safety concerning oxygen exposure.

The focus on weather conditions, remaining air supply, and dive depth is important but secondary to understanding the implications of elevated oxygen levels. While weather can affect surface conditions and may influence dive plans, it does not directly interact with the physiological effects of the gas mixture. Tracking air supply is crucial for any dive’s safety but is not specific to EANx considerations. Depth is significant for understanding pressure-related effects, but once again, it is less critical than monitoring oxygen levels for this particular type of diving, where the primary concern shifts towards handling the increased oxygen concentration effectively.