navigational instrument

Noun
  1. An instrument used for navigating (synset 103818716)
    is a type of: instrument - a device that requires skill for proper use
    subtypes:
    • artificial horizon, flight indicator, gyro horizon - a navigational instrument based on a gyroscope; it artificially provides a simulated horizon for the pilot
    • compass - navigational instrument for finding directions
    • depth finder - navigational instrument used to measure the depth of a body of water (as by ultrasound or radar)
    • inclinometer - an instrument showing the angle that an aircraft makes with the horizon
    • asdic, echo sounder, sonar - 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

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