Question

what is Sonar and working of sonar​

Answer 1

a system for the detection of objects under water by emitting sound pulses and detecting or measuring their return after being reflected

Answer 2

Sonar (originally an acronym for sound  navigation ranging) is a technique that uses sound propagation (usually underwater, as in submarine navigation) to navigate, communicate with or detect objects on or under the surface of the water, such as other vessels.

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