October 1945, and scrapped on 1 February 1946. Length of service Following the decommissioning of the submarines N-1, N-2 and N-3 in April 1926, O-4 was the oldest submarine in active service with the United States Navy until her final decommissioning in September 1945. (Although O-4 was fourth boat numerically in the O Class, she was the first commissioned.) O-4 held the distinction of being the US Navy submarine in service for the longest period of time (27 years 4 months) until surpassed by USS Picuda (SS-382) in February 1971. Awards World War I Victory Medal American Defense Service Medal American Campaign Medal World War II Victory Medal Notes References External links United States O-class submarines World War I submarines of the United States World War II submarines of the United States Ships built in Quincy, Massachusetts 1917 ships