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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 ...
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 ...
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.
The lower surface pressure causes larger volume change with the same change in depth relative to the surface compared to sea level conditions. As in the case for sea level diving, the ambient pressure at depth is the atmospheric pressure on the surface of the water plus the hydrostatic pressure due to the weight of the water column above that ...
A depth gauge 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 in all reasonably foreseeable circumstances should ensure that they have an alternative breathing gas supply available at all times in case of a failure of ...
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 ...
Depth gauges need to be viewable at all times, particularly during ascent and decompression. They are wrist-mounted on the right arm, to allow monitoring while buoyancy is being controlled using the left hand to operate the inflator hose and dump valves on the left.
a dive computer (also known as personal decompression computer) or a depth gauge and timer, to monitor the dive profile, avoid decompression obligation and facilitate a controlled ascent; a surface marker buoy or other surface detection aid may be standard equipment in some regions to allow the surface crew and boats to monitor the diver's ...
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