Just before her record dive to the bottom of the Marianas Trench, 23 January 1960. The dive, to a depth of 35,800 feet in the Challenger Deep, off Guam, was made with Lieutenant Don Walsh, USN, and Swiss scientist Jacques Piccard on board. Waves were about five to six feet high when the two men boarded Trieste from the rubber raft seen at left. USS Lewis (DE-535) is steaming by in the background. U.S. Naval History and Heritage Command Photograph.