Launched 31 December 1917, at the Fore River Shipbuilding Company, Quincy, MA, and commissioned on 11 July 1918, SS-69, U.S.S O-8 submarine operated out of Philadelphia on east coast patrols during World War I. A part of the group that departed for Europe on 2 November 1918, she was also called back when the Armistice was signed.
Following the same interwar course as her sisters, O-8 was assigned to New London as a training boat in the 1920s, participated in the Coco Solo deployment in 1924, and was mothballed in Philadelphia 27 May 1931.
Recalled to active duty and recommissioned on 28 April 1941, O-8 spent the war as a training boat in New London. She was decommissioned on 11 September 1945, stricken on 11 October, and sold for scrap on 4 September 1946.
Builder: Fore River
Sponsor: Mrs. Alice C. Burg
First Captain: LCDR R.A. Burg