The sixth USS Relief (AH-1), the first ship of the United States Navy designed and built from the keel up as a hospital ship, was laid down 14 June 1917 by the Philadelphia Navy Yard; launched 23 December 1919; and commissioned 28 December 1920 at Philadelphia, Commander , Medical Corps, USN, in command. With a bed capacity of 550 patients, Relief was one of the world's most modern and best equipped hospital ships. Assigned to the Atlantic Fleet, she departed Philadelphia 26 February 1921 to provide fleet units on Caribbean maneuvers with all the facilities of a modern shore hospital.