Depth gauge
A depth gauge is an instrument for measuring depth below a vertical datum or other reference surface. They include depth gauges for underwater diving and similar applications.
A depth gauge is an instrument for measuring depth below a vertical datum or other reference surface. They include depth gauges for underwater diving and similar applications.
A depth gauge is an instrument for measuring depth below a vertical datum or other reference surface. They include depth gauges for underwater diving and similar applications.
Source: Wikipedia "Depth gauge" · CC BY-SA 4.0
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