(SS–76: dp. 491 (surf.), 566 (subm.); l 175’; b. 16’7” ; dr. 13’11”; s. 14 k. (surf.), 11 k. (subm.); cpl. 29; a. 4 18”, tt., 1 3”; cl. O–11).
O–15 (SS–76) was laid down 21 September 1916 by California Shipbuilding Co., Long Beach, Calif.; launched 12 February 1918; sponsored by Mrs. J. J. Murphy; and commissioned 27 August 1918, Lt. C. K. Martin, in command.
Commissioning during the final months of World War I, O–15 saw brief war–time service, on patrol along the Atlantic coast. After the war, she reported to Philadelphia, where machinists and electricians worked on her until 20 September 1919, when she was reduced to in commission in reserve at Cape May, N.J. She departed Philadelphia in April 1920 and proceeded, via Jamaica, to Coco Solo, C.Z., where she underwent overhaul and conducted experimental tests. Conducting training cruises, she operated in and around Cuba and the Virgin Islands early in 1922 and returned to Coco Solo in April.
O–15 reported to Philadelphia in November 1923 and decommissioned there 11 June 1924. Struck from the Navy Register 9 May 1930, she was scrapped, under terms of the London Naval Treaty 30 July 1930.