How does EANx diving affect planning for deep vs. shallow dives?

The impact of EANx (Enriched Air Nitrox) diving on planning for deep versus shallow dives is significant and primarily relates to diver depth limits and required no-decompression strategies.

When using enriched air, the increased percentage of oxygen in the gas mixture allows divers to extend their no-decompression limits, especially at shallower depths. This is important as it changes how divers approach their dive plans. For instance, the use of enriched air can lower the risk of nitrogen narcosis and reduce the narcotic effects at greater depths, allowing divers to potentially dive deeper or stay longer. However, divers must be mindful of the partial pressure of oxygen that increases with depth—this can lead to oxygen toxicity at greater depths. Therefore, effective dive planning involves careful consideration of the gas mixture, ensuring that divers do not exceed their individual limits and that they incorporate safe ascent rates, safety stops, and appropriate surface intervals.

Thus, EANx diving not only influences the overall planning process but also necessitates a clear understanding of the interactions of depth, time, and gas mixture to enhance safety and enjoyment during the dive.