The principal technique for finding ocean depth today is_______ .
A) seismic waves
B) loran
C) radar
D) sonar

Question

The principal technique for finding ocean depth today is_______  .
A) seismic waves
B) loran
C) radar
D) sonar

Quizplus · Accepted Answer

Sonar (sound navigation and ranging) is currently the principal technique for finding ocean depth. Sonar uses sound waves to measure water depth by transmitting a pulse of sound and recording the time it takes to bounce off the ocean floor and return. This information can then be used to create a picture of the ocean floor topography. Seismic waves can also be used to study the Earth's crust beneath the ocean floor, but they are not primarily used for measuring ocean depth. Loran and radar are navigation systems that use radio waves and are not used for measuring ocean depth.

The Principal Technique for Finding Ocean Depth Today Is_______