1 Expand SONAR.Write its one application.
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sonar hi a system which is used in used in submarine tothr object
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the acronym SONAR stands for SOund Navigation And Ranging...it is a device that uses ultrasonic waves to measure the distance direction and speed ...it is consist of a transmitter and a detector ....
applied to determine the depth of the sea and to locate underwater hills , valleys , submarine , icebergs,sunken ship etc...
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