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Lightweight demand helmets are rigid structures which fully enclose the head of the diver and supply breathing gas "on demand". The flow of gas from the supply line is activated by inhalation reducing the pressure in the helmet to slightly below ambient, and a diaphragm in the demand valve senses this pressure difference and moves a lever to open the valve to allow breathing gas to flow into ...
A diver in a pool wearing an AGA full face mask A diver wearing an Ocean Reef full face mask Head protection helmet for use with Ocean Reef full face diving mask. A full-face diving mask is a type of diving mask that seals the whole of the diver's face from the water and contains a mouthpiece, demand valve or constant flow gas supply that provides the diver with breathing gas. [1]
The usual meaning of diving helmet is a piece of diving equipment that encases the user's head and delivers breathing gas to the diver, but the term "diving helmet", or "cave diving helmet" may also refer to a safety helmet like a climbing helmet or caving helmet that covers the top and back of the head, but is not sealed. These may be worn ...
Diving boots - With dry suits, the boots are usually integrated. [3] Safety helmet for scuba diving. (Not part of the breathing apparatus.) Diving chain mail may be used as protection against bites by large marine animals; Diver's cages may be used as protection against large predators
John Deane (1800–1884; known as The Infernal Diver), with his brother Charles, invented the diving helmet and performed diving operations at the wreck of the Mary Rose. [1] They received their education at The Royal Hospital School, Greenwich and were both in attendance in 1812.
Hilbert Joseph Savoie Jr., [1] known as Joe Savoie (25 January 1926, Pointe au Chen, Louisiana – 10 March 1996, Boutte, Louisiana), [2] [3] was a pioneering commercial diver and inventor of lightweight diving helmets, particularly the neck dam feature which allows the helmet to be sealed to the diver independently of the diving suit.
A diving mask (also half mask, dive mask or scuba mask) is an item of diving equipment that allows underwater divers, including scuba divers, free-divers, and snorkelers, to see clearly underwater. [ 1 ] [ 2 ] Surface supplied divers usually use a full face mask or diving helmet , but in some systems the half mask may be used. [ 2 ]
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.