Question

what is sonar ? and uses of it​

Answer 1

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Sonar (originally an acronym for sound navigation 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.

Answer 2

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• It is a system used for under water study.

• SONAR technology is similar to radar, ultrasound and seismics technologies.

• There are two main types of SONAR viz. passive sonar and active sonar as shown in the figure-1. Passive SONAR relies on acoustic noise waves radiated by under water targets for its operation.

• Active Sonar transmits acoustic signal which propagates towards target (or reflector) and gets reflected. This reflected waves travel back towards SONAR receiver. The reflected echo is being used by radar for its operation.

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