Gravity measurements at sea, 1950 and 1951

Abstract

During 1950 and 1951, 447 gravity measurements at sea were made on five cruises in United States Navy submarines. Gravity observations were made on cruises from San Diego, California, to Pearl Harbor, Hawaii, to Japan and Guam by way of the Philippine Islands and return to Pearl Harbor, from Pearl Harbor to the Canal Zone and New London, Connecticut, and from New London to Taranto, Italy, and return to Norfolk, Virginia. Improvements in the pendulum apparatus include the installation of a more reliable and less expensive light source and the installation of fiduciary markers to provide two reference lines on the photographic records.