The air we breathe (including the air in tanks that divers use) is about 1/5 (21%) Oxygen and 4/5 (79%) Nitrogen.
Nitrox has extra oxygen (most commonly 32% or 36%) and correspondingly less Nitrogen.
By using Nitrox, we absorb Nitrogen slower so the dive is safer.
As an Ocean Diver you can use Nitrox 32 and Nitrox 36 as 'safe air' to reduce risk of the bends.
As a Sport Diver or above, you can use any mixe of Nitrox (up to 36%) for safety or to get a longer dive.
BSAC is the first (and only) agency to integrate Nitrox with our diver training program, offering all our divers increased flexibility and safety in their diving.