German submarine U-117 was a Type XB minelaying U-boat operated by Nazi Germany's Kriegsmarine during World War II. Laid down on 1 July 1939 at Friedrich Krupp Germaniawerft in Kiel (yard number 616), she was launched on 22 July 1941 and commissioned on 25 October 1941 under the command of Fregattenkapitän Hans-Werner Neumann. U-117 was designed for the strategic purpose of laying mines across enemy shipping lanes and was part of Germany’s broader naval efforts to disrupt Allied maritime operations. Her service history comprises five patrols, during which she primarily operated in the North Atlantic, Norwegian coast, Iceland, and the Bay of Biscay. U-117’s early patrols were uneventful, as she neither attacked nor was attacked. Her first attack occurred during her fourth patrol, which began on 31 March 1943. During this mission, she operated in the Mid-Atlantic, near the Canary Islands, and scored her only two wartime successes: damaging the American tanker Matt W. Ransom on 11 April 1943 and severely damaging the British merchant ship SS Empire Morn on 25 April 1943, both by mines. Her final patrol commenced on 22 July 1943 from Bordeaux with the primary objective of laying 66 mines off New York City. During this mission, she was diverted to assist U-66, which was in need of medical supplies. On 6 August 1943, U-117 rendezvoused with U-66 off North America. However, the following day, while refueling from U-66, U-117 was attacked by aircraft from USS Card. She was hit by a FIDO homing torpedo during the attack and was subsequently sunk with all hands lost. The attack also damaged U-66, which managed to escape. The sinking marked the end of U-117’s operational service, which was characterized by her role in minelaying and her brief but notable wartime engagement.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.