Sonar
Of measuring instrument, submarine and navigational instrument. May also be referred to as asdic and echo sounder.
A measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee".
This concept's ID is @1~23407
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