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Noun: echo sounder
  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
    "echo sounder is an acronym for sound navigation ranging";
    - sonar, asdic

Derived forms: echo sounders

Type of: measuring device, measuring instrument, measuring system, navigational instrument

Part of: pigboat, sub, submarine, U-boat

Encyclopedia: Echo sounder