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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 ...
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.
Dive computer and compass in a console mounted on the submersible pressure gauge. Any scuba diver who will be diving below a depth from which they are competent to do a safe emergency swimming ascent should ensure that they have an alternative breathing gas supply available at all times in case of a failure of the equipment they are breathing ...
depth gauge. See: Depth gauge. A pressure gauge calibrated to measure depth as a function of ambient pressure. descending line. See also: jackstay, downline and shotline. A substantial heavily weighted line attached to a secure point at the surface, such as a boat or buoy, which can be used by a diver to control position and depth during ...
4.12 Depth Gauge. 4.13 Compass. 4.14 Variation to ... The DIR philosophy is now used as a basis for teaching scuba diving from entry-level to technical and cave ...
Some digital depth gauges also indicate ascent rate which is an important factor in avoiding decompression sickness; 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.
As the dive computer automatically measures depth and time, it is able to warn of excessive ascent rates and missed decompression stops and the diver has less reason to carry a separate dive watch and depth gauge. Many dive computers also provide additional information to the diver including ambient temperature, partial pressure of oxygen in ...
Deep diving is underwater diving to a depth beyond the norm accepted by the associated community. In some cases this is a prescribed limit established by an authority, while in others it is associated with a level of certification or training, and it may vary depending on whether the diving is recreational , technical or commercial .
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