Answer
A bathymetric globe is a globe that displays the bathymetry, or depth, of the ocean. The bathymetric globe was developed by Marie Tharp and Bruce Heezen in the 1950s. The globe was created by using data from echo soundings, which measure the depth of the ocean by bouncing sound waves off the seafloor. The bathymetric globe is an important tool for understanding the ocean floor and its features.