Enriched Air Nitrox, gas with an oxygen content above 21%, is mainly used in scuba diving to reduce the proportion of nitrogen in the breathing gas mixture.
I often get asked how do you know what mixes of bottom gas to take on a dive? There are two schools of thinking here, Best Mix for the dive or Standard Mixes for a variety of dives. Essentially Best Mix means you calculate the mix based on the planned depth of the dive. So [...]