Name the technique that uses ultrasonic waves to measure the distance, direction, and speed of underwater objects.

Ultrasonography

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SONAR

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Echolocation

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RADAR

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Solution

The correct option is B SONAR
The technique or the device is SONAR. It stands for Sound Navigation and Ranging.
It is made up of receiver and transmitter. Transmitter produces ultrasound waves and receiver or detector receives the waves after reflection from an obstacle and then it converts these received waves into electrical signal which is used to know the depth of the sea or any other obstacle underwater.

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