What is Hookah Diving? Hookah diving consists of a petrol or battery-powered air compressor that delivers air, through a long hose called a down-line, to the diver under the water. It can run for 3 to 3.5 hours on a tank of petrol and supply air to more than one diver at a time (depending upon the size).
The beauty of the Hookah system is that it frees you of most of the equipment traditionally involved with diving. But it still is breathing compressed gases, so all the rules still apply!