SM U-104 was a German Type U 57 U-boat during the First World War. U-104 was built at AG Weser in Bremen, launched on 3 July 1917 and commissioned on 12 August 1917. She completed four patrols under Kptlt. Kurt Bernis and was responsible for the sinking of nine vessels of a total of .
Loss On 25 April 1918 the U-104 was engaged by in St. George's Channel and severely damaged. Later the same day came upon her and dropped further depth-charges, sinking her and leaving but a single survivor of her 42-member crew. The wreckage lies at position .
Summary of raiding history DateNameNationalityTonnageTonnages are in gross register tonsFate26 October 1917Sapele4,366Sunk15 December 1917Maidag1,253Sunk21 December 1917Spro1,507Sunk25 December 1917Ajax1,018Sunk2 March 1918Kenmare1,330Sunk12 April 1918Njaal578Sunk16 April 1918Widwud299Sunk20 April 1918Lowther Range3,926Sunk22 April 1918Fern444Sunk
See also U-boat Campaign (World War I)
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