 The contract was changed in 1944, and the Bay-class ship was laid down on 31 August 1944, launched on 29 March 1945, and completed on 11 October 1945 after the end of hostilities.After sea trials and weapons testing, "Tremadoc Bay" sailed on her first mission; towing a German Type XXI submarine to the Baltic Sea to be handed over to the Soviet Navy.The Tripartite Naval Agreement had agreed that all German U-boats would be sunk, apart from 30 that would be preserved and divided equally between the USSR, United Kingdom and United States for experimental and technical purposes.