Answers

2016-02-27T06:39:48+05:30
It is a device that is used in ships to detect and thing below it also to know the depth of the sea.the word sonar originally came from sound navigation and ranging the technique uses the propagation of sound waves.

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2016-02-27T14:35:07+05:30
Sonar means SOUND NAVIGATION AND RANGING.
It helps us to detect underwater objects like submarines
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