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The no-bolt helmet used a spring-loaded clamp to secure the helmet to corselet over the suit gasket, and many helmets were sealed to the breastplate by a 1/8 turn interrupted screw thread. Swedish helmets were distinctive for using a neck ring instead of a corselet, a precursor of more modern diving equipment, but cumbersome and uncomfortable ...
Corselet showing interrupted thread for helmet connection and brailes clamping it to the suit. 12-bolt in background, 6-bolt in foreground. The corselet, also known as a breastplate or gorget , is an oval or rectangular collar-piece resting on the shoulders, chest and back, to support the helmet and seal it to the suit, usually made from copper ...
They also made frogman's equipment for the British armed forces during World War 2, and later, sport scuba gear. See makes of rebreather. Siebe Gorman and Co manufactured 12 bolt, 8 bolt, 6 bolt, 3 bolt, 2 bolt, no bolt, flange, and 12 bolt square corselet standard diving helmets.
Scuba regulators, buoyancy compensators, swimfins. Medi (diving equipment), East Germany – 3-bolt helmets [56] Marinverkst of Karlskrona, Sweden –Standard diving equipment. [81] McLean – Dive computers. [9] Mercury Products, Billingshurst, UK. SDBA (Special Duty Oxygen Breathing Apparatus)
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 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] Free-flow helmets compensate for a potentially large dead space by a high gas flow rate, so that exhaled gas is flushed away before it can be rebreathed. [41]:
The backpack supports and stabilises the scuba cylinder on the diver's back. backplate. Main article: Backplate and wing. A plate, normally made from metal, which rests against the diver’s back, and to which the primary scuba cylinders are attached. Held to the body by harness straps over the shoulders and round the waist.
Vinyl toolbag with bolt snaps for securing to harness Diving tool bag to carry tools that may be required for the job. Various types and sizes are available. [22] Reef hook to hold onto a reef in a current. This is a metal rod with a handle and a bent tip to grip the reef surface.
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