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A depth gauge is an instrument for measuring depth below a vertical reference surface. They include depth gauges for underwater diving and similar applications. A diving depth gauge is a pressure gauge that displays the equivalent depth below the free surface in water. The relationship between depth and pressure is linear and accurate enough ...
Pneumofathometer is the surface supplied diving depth gauge which displays the depth of the diver at the surface control panel. It uses hydrostatic back-pressure on a low flow rate open ended air hose to the diver to indicate depth. Diving watch is used with depth gauge for decompression monitoring when using decompression tables. Largely ...
The US Navy first provided a diving manual for training and operational guidance in 1905, and the first book titled Diving Manual was published in 1916. Since then books titled Diving Manual or U.S. Navy Diving Manual have been published several times, each one updating the content of the previous version. The amount of information provided has ...
Royal Navy practice before 1962 is described by Robert Davis in his book "Deep Diving and Submarine Operations", and the Royal Navy's The Diving Manual of 1943. Rate of ascent to the first stop was limited to 60 feet per minute, largely to avoid overshooting the first stop, an artifact of the method for measuring depth by pneumofatometer off ...
The first recreational mechanical analogue dive computer, the "decompression meter" was designed by the Italians De Sanctis and Alinari in 1959 and built by their company named SOS, which also made depth gauges. The decompression meter was distributed directly by SOS and also by scuba diving equipment firms such as Scubapro and Cressi.
The depth range applicable to scuba diving depends on the application and training. Entry-level divers are expected to limit themselves to about 60 feet (18 m) to 20 metres (66 ft). [100] The major worldwide recreational diver certification agencies consider 130 feet (40 m) to be the limit for recreational diving.
The highest scuba dive in the continental United States was done on 7 September 2013 by John Bali at Colorado's Pacific Tarn Lake, altitude 4,090 metres (13,420 ft). [ 35 ] [ a ] The deepest known staged decompression altitude dive was conducted by Nuno Gomes at Boesmansgat (Bushman's hole) in South Africa.
The RDP was developed by DSAT and was the first dive table developed exclusively for no-stop recreational diving. [2] There are four types of RDPs: the original table version first introduced in 1988 along with a circular slide rule version called The Wheel, followed by the eRDP, an electronic version introduced in 2005 and the eRDPML, an ...
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