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|Noun||1.||navigational instrument - an instrument used for navigating |
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
instrument - a device that requires skill for proper use
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; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
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