Nitrox is also called Enriched Air where you can dive with up to 40 percent of oxygen instead of normal 21 percent. The advantages are that it gives you a longer bottom time so you have more time to explore your favourite ship wreck. It also reduces the surface interval you have between your dives and this is a great advantages if you dive from a liveaboard where they dive 5 to 6 times a day. And diving with Nitrox does not make you feel tired. This course can get integrated in your Open Water Course, Advanced Course or in a mix with other specialties.