what is sonar write its two uses
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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.
ankit271:
the technique used by submarine is radar and not sonar
it's sonar
sonar is by ships
to calculate depth
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sonar is technique used by the ships to calculate the depth of sea by the reflection of ultrasounds
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