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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 ...
A sailor and a man on shore, both sounding the depth with a line. Depth sounding, often simply called sounding, is measuring the depth of a body of water.Data taken from soundings are used in bathymetry to make maps of the floor of a body of water, such as the seabed topography.
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Continental shelves appear mostly by a depth of 140 meters, mid-ocean ridges by 3000 meters, and oceanic trenches at depths beyond 6000 meters. A seafloor map captured by NASA Bathymetry ( / b ə ˈ θ ɪ m ə t r i / ; from Ancient Greek βαθύς ( bathús ) 'deep' and μέτρον ( métron ) 'measure') [ 1 ] [ 2 ] is the study of ...
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.
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