This excerpt from International Aspects of Oceanography, an NSF publication, was written by Wayland Vaughn of the Scripps Institution of Oceanography

This excerpt from International Aspects of Oceanography, an NSF publication, was written by Wayland Vaughn of the Scripps Institution of Oceanography in 1937 and describes the contribution of both echo-sounding and the navigation system termed Radio-Acoustic Ranging (RAR) to the mapping of the seafloor. RAR was developed by the C&GS and used to survey U.S.continental margins in the 1930’s.