 The project took him to the Midwestern United States for work similar to geophysical surveys and elsewhere in the world to establish gravity base stations.In 1957, he was assigned to a second tour aboard "Explorer", but before she sailed he was transferred to "Pathfinder" as operations officer.During his tour, "Pathfinder" operated in the Bering Sea, in Cook Inlet, in the Seward, Alaska, area, and along the southeast coast of Alaska.