sonar

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 (synset 104266881)
   "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
   is a type of:

   • measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
   • navigational instrument - an instrument used for navigating
   has:

   • pinger - a pulse generator used for echo sounding in sonar
   • pulse generator - a generator of single or multiple voltage pulses; usually adjustable for pulse rate
   is a part of: pigboat, sub, submarine, u-boat - a submersible warship usually armed with torpedoes
   same as: asdic, echo sounder

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