Scuba diving

SCUBA is an acronym for "Self Contained Underwater Breathing Apparatus". In short, scuba diving is strapping a tank of air to your back out of which you can breathe air so you won't drown. SCUBA was co-invented by Jacques Cousteau and [Emile Gagnan]? in 1943 as the Aqua-lung.

The maximum safe depth for use of normal scuba gear is between 30 and 50 metres, before nitrogen narcosis becomes a danger, even with Enriched Air Nitrox.

One global organization for Scuba Diving is PADI, who can be seen at http://www.padi.com/