Question

what is the full form of SONAR and what is it?

Answer 1

the full form of SONAR is Sound Navigation And Ranging. This is a technique which is used to get the distance, direction and speed of a body which is deep inside the water with the help of ultrasound.
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Answer 2

SONAR stands for SOund Navigation And Ranging.Sonar is a device that uses ultrasonic waves to measure the distance,direction and speed.