PADI Enriched Air
(Nitrox) Course
Enriched Air EANx, or as it is so often called NITROX, is simply normal air enriched with additional Oxygen so it has more than 21% oxygen. By replacing some of the nitrogen that you breathe underwater with oxygen, you will absorb less nitrogen that you would if breathing normal air. This means that you have longer no-decompression limits for each depth than you would using air. A common misconception among divers is that NITROX is a deep diving gas. In fact, it is best applied to shallower dives.