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Top Terms > Communication and control > Control > Navigation > Navigational aids > Navigational aids specific to a craft or vehicle > Ship navigational aids > Sonar

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Sonar (Dcnsyss)

Definition
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. (Source: wordnetweb.princeton.edu)
Broader Term
Ship navigational aids (Dcnsys)
Narrower Terms
Doppler sonar (Dcnsyssd)
Sonar domes (Dcnsysst)
Sonar transducers (Dcnsyssv)
Related Terms (Hierarchical)
Buoys (Dcnsysd)
Lightships (Dcnsysm)
Voyage data recorders (Dcnsysv)