What does "EANx" stand for?

EANx stands for Enriched Air Nitrox. This term specifically refers to a breathing gas mixture that contains a higher percentage of oxygen than the normal atmospheric concentration, which is about 21% oxygen and 79% nitrogen. In Enriched Air Nitrox, the oxygen concentration is typically between 22% and 40%, allowing divers to extend their bottom time significantly while reducing nitrogen absorption during dives. This can help mitigate the risk of decompression sickness, as divers experience less nitrogen exposure compared to breathing regular air.

Understanding "EANx" is crucial for divers who wish to use this gas mixture effectively and safely, as it requires specific training and knowledge of how to plan dives using enriched air. Divers must be aware of the implications of increased oxygen levels, including the risk of oxygen toxicity at greater depths. This terminology is a fundamental aspect of Nitrox training and is essential for safe diving practices with enriched air mixtures.