Bathometer
Encyclopedia
Bathometer is an instrument
Instrument
Instrument may refer to:* Instrument , a documentary of the band Fugazi, directed by Jem Cohen* Instruments , a performance visualizer-Science and technology:...

 by which is measured water depth. It is usually used in oceanographical
Oceanography
Oceanography , also called oceanology or marine science, is the branch of Earth science that studies the ocean...

measurements, although now it is rarely used.
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