Enriched Air Nitrox Course Cost: $125 The waters are calm, temperate and comfortable. The visibility is the best you’ve ever experienced. It’s that perfect day; you know, the one that becomes a part of your “best dive day” stories. You glance down at your dive computer, then up at your buddy with a big regulator smile and you give him the Okay. There’s no need for words–you both know this dive isn’t going to end anytime soon. You are both diving with enriched air nitrox! What is Enriched Air Nitrox? Enriched air nitrox is a great tool to help you enjoy longer dives. Enriched air makes this possible because it contains less nitrogen and a higher percentage of oxygen than normal air. This means that you absorb less nitrogen as you dive, giving you more bottom time!