Question

explain the working of sonar with well labelled diagram in long answer type

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.[2] Two types of technology share the name "sonar": passive sonar is essentially listening for the sound made by vessels;active sonar is emitting pulses of sounds and listening for echoes. Sonar may be used as a means of acoustic location and of measurement of the echo characteristics of "targets" in the water. Acoustic location in air was used before the introduction of radar. Sonar may also be used in air for robot navigation, and SONAR (an upward-looking in-air sonar) is used for atmospheric investigations. The termsonar is also used for the equipment used to generate and receive the sound. 

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Answer 2

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