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The fathometer is an echo sounding system for measurement of water depth. A fathometer will display water depth and can make an automatic permanent record of measurements. Since both fathometers and fishfinders work the same way, and use similar frequencies and can detect both the bottom and fish, the instruments have merged. [2]
Since a historical pre-SI unit of water depth was the fathom, an instrument used for determining water depth is sometimes called a fathometer. Most charted ocean depths are based on an average or standard sound speed.
The first practical fathometer (literally "fathom measurer"), which determined water depth by measuring the time required for an echo to return from a high-pitched sound sent through the water and reflected from the sea floor, was invented by Herbert Grove Dorsey and patented in 1928. [10]
This technique has been superseded by sonic depth finders for measuring mechanically the depth of water beneath a ship, one version of which is the Fathometer (trademark). [22] The record made by such a device is a fathogram. [23]
Fathometer or fishfinder: a device to locate fish at various water depths; Echo sounding: a technique using sound pulses to measure depth; sounding line: a length of ...
Lead study author Dr. Ernest Di Maio and his colleagues cooked 160 eggs, testing the different egg-boiling techniques and observing the changes in heat throughout each of the eggs.
A digital depth gauge combined with a timer and temperature display, also referred to as a "Bottom timer" A depth gauge is an instrument for measuring depth below a vertical reference surface.
The History Channel's 'The Food That Built America' is returning to television screens for its sixth season and two Delish editors will be joining the show.