Technology

Seawater naturally contains between 1.5% to 2.5% dissolved air, 34% of which is Oxygen. The dissolved air can be separated from the water by applying low pressure. This, according to Henry's Law, which states that the amount of a gas that can be dissolved in a liquid is proportional to the pressure on the liquid. Reducing the pressure will cause dissolved gas to be released from the liquid (this is what happens when you open a bottle of soda). Reduction of the pressure will be achieved by using a centrifuge, causing lower pressure in the center. After separation the air is transferred to an air bag for use by the diver.