Nitrox or Entiched air is a breathing gas that has a lot of benefits for both new and experienced divers. These include a shorter surface interval between dives. Also Energy levels at the end of the day are increased because of less exertion. Breathing Nitrox also makes you a safer diver because you are accumulating less nitrogen in your body during a dive. This course will cover the use of nitrox mixtures from 22 to 40 percent oxygen.