Synonyms of sonar

Noun

1. sonar, echo sounder, asdic, measuring instrument, measuring system, measuring device, navigational instrument

usage: 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"

Definition and meaning of sonar (Dictionary)