Enriched Air Diving sometimes called "Nitrox" is another of PADI's Specialty Courses available to the certified diver. Enriched Air Diving can open up new worlds to the certified diver, if you enjoy deep diving it will increase your bottom time, if you are a hunter it will allow you to hunt longer and deeper, if you're a photographer you can take more picture on every dive, whatever you do underwater nitrox can make it a longer experience. Enriched Air Diving uses a higher oxygen content then normal air. The PADI Enriched Air Diving DVD will explain to you in detail how nitrox can help you enjoy the sport of diving to its fullest.