On 8 February 1980, the oldest diesel-electric submarine in the Navy and the last operational one in the Atlantic Fleet was decommissioned. Tang was struck from the U.S. Naval Vessel Register on 6 August 1987. Tang was transferred to the Turkish Navy becoming the TCG Pirireis (S 343), Pirireis served in the Turkish Submarine Forces until she was decommissioned in August 2004. The boat is currently preserved at İnciralti Sea Museum, in İzmir, Turkey.