Answers

2016-02-04T11:18:02+05:30
Sonar stand for SOund Navigation And Ranging. It is a device used to find the depth of sea or ship materials in the sea. This device uses sound propagation technique. 
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2016-02-04T13:41:37+05:30
Sonar (originally an acronym for SOund Navigation And 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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