short career, U-104 sank one enemy vessel and damaged another on her first and only war patrol in the North Sea, off the northern coast of Ireland and Great Britain. She went to sea on her first and only war patrol on 12 November 1940. For a period of 17 days, she roamed the North Sea and eventually the northern coast of Scotland and Ireland in search of any Allied convoys heading to Great Britain. During that time she attacked two enemy vessels, sinking one and damaging the other. On 27 November 1940, U-104 torpedoed and sank the British merchant vessel Diplomat, a straggler of convoy HX 88, with the loss of 14 of her crew. The other merchant vessel was the British motor tanker Charles F. Meyer, of convoy HX 87, which survived the attack. The next day, U-104 went missing just north of neutral Ireland. She is presumed to have been sunk by a mine from the SN 44 minefield, which was laid on 8 November 1940, just 20 days prior to U-104s disappearance. All of her crew are presumed dead. Summary of raiding history References Bibliography External links German Type IX submarines U-boats commissioned in 1940 U-boats sunk in 1940 World War II submarines of Germany 1940 ships Ships built in Bremen (state) U-boats sunk by mines Maritime incidents in November 1940