What is an essential skill for divers using EANx regarding dive planning?

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Understanding gas mix implications and proper depth limits is crucial for divers using Enriched Air Nitrox (EANx). EANx contains a higher percentage of oxygen compared to regular air, which allows divers to extend their no-decompression limits and reduce nitrogen absorption during dives. However, it also brings an increased risk of oxygen toxicity when diving at greater depths. Divers must be familiar with the specific gas mix they intend to use, including its Maximum Operating Depth (MOD) to ensure they do not exceed safe limits.

Proper dive planning incorporates knowledge of these gas mix properties, including the percentages of oxygen and nitrogen, and how they affect the diver’s physiology at various depths. This understanding helps in setting safe limits for diving, managing the risks associated with higher oxygen concentrations, and ensuring that all dive profiles are planned with safety as a priority. Without this skill, divers might inadvertently expose themselves to unsafe conditions, making it imperative for all EANx divers to grasp these concepts thoroughly.

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