Question

What is SONAR? Explain its working? What is this technique called
and why?

Answer 1

Answer:

sonar - sound navigation and ranging.

this technique is used to detect the depth of the sea.

it is used for detect underwater hazards to navigation, search for and map objects on the seafloor such as shipwrecks, and map the seafloor itself.

Answer 2

Answer:

SONAR stands for Sound Navigation And Ranging. It is used to detect objects under the water surface and measure the depth of oceans. It sends ultrasonic waves at a certain speed under the water surface, and hears an echo. It measures the time interval and uses the formula 2d = st, where d is distance, s is speed and t is time. This means distance between the water surface and sea bed = st/2.