In the term EANx, what does the "x" represent?

In the term EANx, the "x" specifically indicates the percentage of oxygen in the gas mixture. EAN stands for Enriched Air Nitrox, which is a breathing gas containing a higher percentage of oxygen than regular air, typically greater than 21%. The exact composition is denoted by the "x"; for instance, if the mixture is 32% oxygen, it would be referred to as EAN32. This distinction is crucial for divers who use Nitrox, as it influences their dive profiles, maximum operating depths, and decompression obligations. Understanding this terminology helps divers effectively plan their dives to optimize safety and resource management.