USS PC-1643 was an in the United States Navy during the Cold War. She was transferred to the Turkish Navy as TCG Koçhisar (P-116) of the Hisar-class patrol boat.
Construction and commissioning PC-1642 was laid down in 1963 at Gunderson Brothers Engineering Corps., Portland, Oregon. Launched in December 1964.
She was transferred to the Turkish Navy and renamed TCG Koçhisar (P-116).
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