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It is a non-profit, global organization with more than 1,300 members, which promotes scuba diving through consumer awareness programs and media campaigns such as the national Be a Diver campaign; diver retention initiatives such as DiveCaching; and an annual trade-only event for businesses in the scuba diving, action watersports and adventure ...
In flexible bag weights, the small pieces of lead shot will rub together when handled and used, releasing lead dust and corrosion products into the water. [32] The amount of lead lost to the water is roughly proportional to the total surface area of the weights, and the amount of motion between contact surfaces and is greater for smaller sizes ...
The rig comprised a rubber breathing/buoyancy bag containing a canister of barium hydroxide to scrub exhaled CO 2 and, in a pocket at the lower end of the bag, a steel pressure cylinder holding approximately 56 litres of oxygen at a pressure of 120 bar. The cylinder was equipped with a control valve and was connected to the breathing bag ...
Blowdown silencer for emptying scuba cylinders Before internal inspection the valve must be removed after depressurising and verifying that the valve is open. Cylinders containing breathing gases do not need special precautions for discharge except that high oxygen fraction gases should not be released in an enclosed space because of the fire ...
Storm drain – Infrastructure for draining excess rain and ground water from impervious surfaces; Penstock – Intake structure for turbines or sewerage systems; Sluice gate – A movable gate allowing water to flow under it when opened; Hazmat diving – Underwater diving in a known hazardous materials environment
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A lifting bag is an item of diving equipment consisting of a robust and air-tight bag with straps, which is used to lift heavy objects underwater by means of the bag's buoyancy. The heavy object can either be moved horizontally underwater by the diver or sent unaccompanied to the surface. [1] Lift bag appropriate capacity should match the task ...
The safety sausage is claimed to have been invented by New Zealand diver Bob Begg [23] in 1984 after a search and rescue exercise organized by the Dunedin Marine Search and Rescue Advisory Committee failed to find the two divers equipped with yellow scuba cylinders, yellow BCDs, and a yellow catch bag, in an unsuccessful air search of about 3 ...