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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]
Surface-supplied mixed gas diving, using helium based, nitrox, or trimix breathing gases. Usually using lightweight demand helmets, sometimes with helium reclaim systems. Airline or Hookah diving. "Compressor diving" - a rudimentary form of surface-supplied diving used in the Philippines by artisanal fishermen. Recreational forms like snuba.
The definitive equipment for surface-supplied diving is the breathing apparatus which is supplied with primary breathing gas from the surface via a hose, which is usually part of a diver's umbilical connecting the surface supply systems with the diver, sometimes directly, otherwise via a bell umbilical and bell panel.
Underwater breathing apparatus can be classified as open circuit, semi-closed circuit, (including gas extenders) or closed circuit (including reclaim systems), based on whether any of the exhaled gas is recycled, and as self-contained or remotely supplied (usually surface-supplied, but also possibly from a lock-out submersible or an underwater habitat), depending on where the source of the ...
An overhead or penetration diving environment is where the diver enters a space from which there is no direct, purely vertical ascent to the safety of breathable atmosphere at the surface. Cave diving, wreck diving, ice diving and diving inside or under other natural or artificial underwater structures or enclosures are examples. The ...
The full scope of recreational diving includes breath-hold diving and surface supplied diving – particularly with lightweight semi-autonomous airline systems such as snuba – and technical diving (including penetration diving), as all of these are frequently done for recreational purposes, but common usage is mostly for open water scuba ...
DESCO, also known as Diving Equipment and Supply Company Inc. – American manufacturer of commercial diving equipment – Surface supplied and scuba equipment, standard diving equipment. [3] shallow water helmets. [34] Divecomputer.eu – Dive computers. [9] Divematics USA Inc. – Manufacturer of Widolf full-face diving masks since 1980. [35]
The diver may be deployed from the shore or a diving support vessel and may be transported on a diving stage or in a diving bell. Surface-supplied divers almost always wear diving helmets or full-face diving masks. The bottom gas can be air, nitrox, heliox or trimix; the decompression gases may be similar, or may include pure oxygen. [58]