U-219 sailed on a minelaying mission on 22 October 1943 but returned to France on 1 January 1944 after being diverted to fuel other boats in the North Atlantic.[18] U-848 sailed on 18 September 1943 and sank the 4,600-ton British freighter Baron Semple before being sunk by US navy PB4Y Liberators in the South Atlantic on 5 November.[19] U-849 sailed on 2 October 1943 and was sunk by a USN PB4Y Liberator in the South Atlantic on 25 November.[19] U-850 sailed on 18 November 1943 and was sunk by aircraft from USS Bogue on 20 December.[19] U-510 sailed on 3 November 1943 and sank the 7385t British tanker San Alvaro, the 9970t Norwegian Erling Brøvig, the 9181t American freighter E.G.Seubert, the 7229t Norwegian Tarifa, the 7176t American John A. Poor and the 249t British minesweeping trawler Maaløy before reaching Penang on 5 May 1944.[3]