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sonar

English

  1. 🔊 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”

Similar words

echo sounder asdic astronavigation bathometry bathymetry celestial navigation chronometer coastwise navigation consolan dead reckoning depth sounding echo sounding echolocation fathomage fathoming fix line of position loran oceanography pilotage plane sailing point-to-point navigation radar radio beacon