Cuban Missile Crisis. The following summer, the submarine made what, on the basis of sparse records, appears to be her only post-war overseas deployment with the Sixth Fleet in the Mediterranean Sea. Turkish Navy service After successive years of routine operations in the Caribbean Sea and Atlantic Ocean, Threadfin was placed out of commission on 18 August 1972 and transferred to Turkey that same day. She served in the Turkish Navy, on loan, as TCG Birinci İnönü (S346) ("First Inonu") until the following summer. She was the third submarine of that name and commemorated the Turkish victory at the First Battle of İnönü in January 1921. On 1 August 1973, her name was struck from the American Naval Vessel Register. Two weeks later, the loan expired, she was returned to the United States Navy, and sold to Turkey. In mid-1998 she was still in active service in the Turkish Navy. She has reportedly been decommissioned since then. Honors and awards Threadfin was awarded three battle stars for World War II service. References Balao-class submarines Ships built in Kittery, Maine 1944 ships World War II submarines of the United States Cold War submarines of the United States Ships transferred from the United States Navy to the Turkish Navy Balao-class submarines of the Turkish Navy