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sonar
scientist use sound
Depth is a measure of distance between the surface and the ocean floor.
Scientists know the depth of the ocean by using technology like the Deep Worker or the "Alvin". It takes them to the bottom of the ocean so they can study ocean life. Also ships use sonar (SOund NAvigation and Ranging) to see what the depth of the ocean is.
ocean depth
Scientist use the device "Sonar."
Ocean depth
To find out the ocean`s depth
SONAR
They pay the divers to go to the end of the ocean and measure the ocean floor depth before divers dive they take a long endless string keep it up the surface then take it al the way down and cut to where it ends so that when they are finished they measure
'Sonar". And determines depth. The ocean floor topography can be mapped by 'sonar scanning'.
They are sometimes used to measure the depth of an ocean