UA was one of fourteen U-boats that made up the Foreign U-boats of Nazi Germany's Kriegsmarine during World War II. Built at Kiel as one of four submarines of the Ay class for Turkey, Batiray as she was to have been named, was not handed over to the Turkish Navy being seized by Germany and commissioned into the Kriegsmarine in 1939. Two sister ships, Saldiray and Atılay, had been delivered in June 1939.