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Advanced Diving Equipment Company – American manufacturer of surface supplied diving helmets – Swindell free-flow open circuit air helmets. [1]Aeris (dive gear) – American brand of scuba equipment Originally a brand of American Underwater Products, founded in 1998, and merged into a sister-brand, Oceanic, in 2014.
Oceanic is an American manufacturer of scuba gear. It was founded by Bob Hollis in 1972 and is based in San Leandro , California , United States. [ 1 ] Its products include dive computers , rebreathers and a novel diving mask incorporating a heads-up-display of information.
American Underwater Products (ROMI Enterprises, of San Leandro, Calif.): Aeris (scuba), [70] which has merged with Oceanic in 2014. [71] Hollis Gear [72] [73] and Oceanic Worldwide; Atomic Aquatics, American manufacturer of diving regulators and basic diving equipment. [74] The company was acquired by Huish Outdoors in September 2011. [75]
Rebreather diving, closed-circuit or semi-closed-circuit scuba; Freediving or breathhold diving, where the diver completes the dive on a single breath of air taken at the surface before the dive. Snorkelling allows breathing at the surface with the face submerged, and is used as an adjunct to free diving and scuba.
The air passes through a filter and the air hose to the diver's demand valve. Small 12 volt diaphragm compressors are used for recreational hookah, with a delivery of around 1.8 bars (26 psi), which severely limits the depth to which air can be supplied. The rubber diaphragm pump usually requires no oil lubricant and delivers oil-free air. [30]
Surface-supplied diver at the Monterey Bay Aquarium, Monterey, California US Navy Diver using Kirby Morgan Superlight 37 diving helmet [1]. Surface-supplied diving is a mode of underwater diving using equipment supplied with breathing gas through a diver's umbilical from the surface, either from the shore or from a diving support vessel, sometimes indirectly via a diving bell. [2]