Snuba

Snuba is a form of surface-supplied diving in which an underwater breathing system developed by Snuba International is used. The word Snuba is a portmanteau of "snorkel" and "scuba". The swimmer uses swimfins, a diving mask, weights, and diving regulator as in scuba diving. The air, however, instead of coming from tanks strapped to the diver's back, comes through a long hose from tanks on pontoon rafts on the surface (which is different from Hookah diving, where air is generally supplied with a gas-powered air compressor). Snuba often serves as a form of introductory diving, in the presence of a professional, insured guide, and following a half-hour lesson (but not requiring scuba certification).