How are nitrox mixes named?
Nitrox mixes should always be named using the nitrogen percentage to the left of the oxygen percentage; ie NOAA Nitrox I contains 32% oxygen and 68% nitrogen so it should be named: nitrox68/32 or nitrox68 for short. However, be careful because a lot of people get it wrong. If you wish to quote the oxygen percentage use EANx (where x refers to the percentage of oxygen) or ONM (oxygen-nitrogen mixture).