Question

How can submarines use echolocation to tell how close they are to the bottom of the ocean?

Answer 1

Answer:Sample Response: Submarines can release sound waves. These sound waves will hit the bottom of the ocean and be reflected back to the submarine as echoes. The submarine can use these echoes to tell how far it is from the bottom of the ocean.

Explanation: just answered this and this was the answer 100 percent  

Answer 2

To locate a specific target or to determine how close submarines are to the seafloor, they use active and passive sound navigation and ranging (or a SONAR, in simple terms.) It emits pulses of sound waves that travel through the water, reflect off the target and relayed back to the ship. By determining how fast the sound wave travels back, the computers on the sub calculate how far they are from the target.

Hope this helps.