Which of the following techniques is used for identifying object location under water?

SONAR

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RADAR

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GPS

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LASER

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Solution

The correct option is A SONAR
SONAR- Sound navigation and ranging
Sonar uses sound waves and its echoes to identify the location of objects. It is most useful when used underwater.
Electromagnetic waves die out very fast underwater. This makes RADAR, GPS and LASER based technologies not useful under the water bodies.

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