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  1. What apparatus is used to locate a submerged object?

  2. A.

     Radar

    B.

     Sonar

    C.

     Quasar

    D.

     Pulsar

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    Answer : Option B

    Explanation :

    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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