Enriched Air Nitrox (EANx) Diver

If you have ever cut a dive short because your computer hit its no-decompression limit before your air ran low, Enriched Air Nitrox is the course that solves that problem. By breathing a gas mix with a higher oxygen percentage than regular air, you extend your allowable bottom time and shorten the surface interval between dives.

The course covers exactly what you need to use nitrox safely: how to select the right blend for your planned depth, how to calculate the maximum operating depth for a given mix, how to analyze your own tank before every dive, and the physiology behind oxygen toxicity and why it matters more the deeper and longer you stay.

You will also learn the practical side that trips up self-taught divers: how nitrox interacts with standard air dive tables, common gas-blending and analysis procedures at the dive centre, and the small but important habits (like always personally analyzing your tank) that keep nitrox diving as safe as it is useful.

Nitrox pairs naturally with almost every other course on this site. It can be taught as a standalone specialty, or folded directly into your Open Water or Advanced Scuba Diver training so you certify on both at once.

Certified EANx divers can request nitrox fills (typically blends up to 40% oxygen) at dive centres worldwide, personally analyze their mix, and plan dives around the longer no-decompression limits enriched air allows. It's the single most useful add-on for divers doing multiple dives per day.