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'Sonar". And determines depth. The ocean floor topography can be mapped by 'sonar scanning'.
You use Sonar
SONAR
Scientist use the device "Sonar."
To find out the ocean`s depth
to calculate the depth of the ocean floor
sonar
Sonar.
sound waves can penetrate the ocean floor.
Sonar.
AN APPRATUS calld sonar is used to locate underwater objects and to find the depth of water.it sends out high freqncy sound viberations called ultasonic viberations,into the water.the time taken by the viberations to return is then used to calculatethe distance of the reflecting surface.
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