Which type of technology is used to map the ocean floor?

Sound navigation and ranging. Today's technology lets scientists to study the ocean in a quicker and precise way. There are three tools used to map the ocean floor, sonar, satellites, and submersibles. Sonar is a type of electronic depth-sounding equiptment made in the 1920's. It is an acronym for sound navigation and ranging.

Technologies used to explore outer space and the ocean include submersibles, remotely operated vehicles (ROVs), satellites, rovers, diving/scuba gear, buoys, mega corers, water column samplers, and sonar for mapping.