Question

answer...................................

Answer 1

SONAR =SOund Navigation And Ranging

It is a technique that uses sound propagation to navigate,communicate with or detect objects on or under the surface of the water.

Answer 2

Hi
here is your ans
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SONAR
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Expansion : SOund Navigation And Ranging.

SONAR is a device that uses ultrasonic waves .

It I used to measure the distance, direction, and speed of underwater objects. This technique is used to determine the depth of the sea and to locate underwater hills, valleys,submarines, ice bergs, sunken ships etc..

hope it helps..