Question

What did the use of a magnetometer and sonar equipment allow researchers to do?

Answer 1

One of its key points is that it helped oceanographers to chart the sea floor to a much higher degree of accuracy. This helped t discover features that we did not know existed.

Answer 2

Study and map the ocean floor.

A magnetometer detects small changes in magnetic fields, which allowed researchers to study the ocean floor. Another advancement that furthered progress of mapping the ocean floor was sonar equipment, which uses echo-sounding methods to determine the distance from the boat to the bottom of the ocean.