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Helmet casing or shell – A rigid watertight structure that encloses the diver's head and supports most of the other components. The part of a standard helmet that encloses the head may also be called the "bonnet" (British English), and the whole unit may be called the "hat" by professional divers. Traditionally made from spun copper, more ...
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.
A prescription mask, or glasses which can be mounted inside the mask or helmet to provide clear vision underwater, enhancing the experience and safety for those with vision problems. A prescription mask contains lenses mounted in the scuba mask frame or bonded to the original viewports. Diving helmets are often used for surface-supplied diving ...
Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1] The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent ...
Standard diving dress, also known as hard-hat or copper hat equipment, deep sea diving suit or heavy gear, is a type of diving suit that was formerly used for all relatively deep underwater work that required more than breath-hold duration, which included marine salvage, civil engineering, pearl shell diving and other commercial diving work, and similar naval diving applications.
The weight of a lightweight demand helmet in air is about 15 kg. Underwater it is nearly neutrally buoyant so it is not an excessive static load on the neck. The helmet is a close fit to the head and moves with the head, allowing the diver to aim the viewport using head movement to compensate for the restricted field of vision. [40]
A scuba diver moves underwater primarily by using fins attached to the feet; [49] external propulsion can be provided by a diver propulsion vehicle, or a towboard pulled from the surface. Other equipment includes a diving mask to improve underwater vision , a protective diving suit , equipment to control buoyancy , and equipment related to the ...
Main article: Underwater habitat An underwater structure inside which divers can carry out dry welding or which is fitted out with life support facilities. Haldanean Haldanian See: Decompression theory#Critical ratio hypothesis Decompression models based on the principles described by John Scott Haldane. half+200 half+15 See: Half + 15 bar An alternative scuba reserve gas management strategy ...
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