Scuba diving is a kind of underwater diving within which a diver uses a self contained underwater device .
An underwater diver sometimes moves around underwater by victimization finshooked up to the feet, however external propulsion will be provided by a diver propulsion vehicle, or a sled force from the surface.
Concept of Scuba diving :
Unlike different methods of diving, that depends either on breath-hold or on air wired from the surface, in scuba diving ; Aqua-Lung divers carry their own supply of respiratory gas, sometimes compressed gas, permitting them bigger freedom of movement than with associate degree air line or diver’s point and longer underwater endurance than breath-hold. Aqua-Lung instrumentation used in scuba diving is also a circuit, within which exhaled gas is expelled to the environment, or a closed or semi-closed circuit re-breather, within which the respiratory gas is cleaned to get rid of carbonic acid gas, and also the O2 used is replenished from a provide of feed gas before being re-breathed.
An underwater diver sometimes moves around underwater by victimization finshooked up to the feet, however external propulsion will be provided by a diver propulsion vehicle, or a sled force from the surface.
