SM U-106
SM U-106 was one of the 329 submarines serving in the Imperial German Navy in World War I. U-106 was commissioned on 28 July 1917, under the command of Kapitänleutnant Hans Hufnagel, and participated in one wartime patrol starting on 2 September 1917. On 18 September 1917, during the First Battle of the Atlantic, U-106 was credited with the sinking of, an Acasta class destroyer, and damaging "City of Lincoln", a steamer, in the Western Approaches. She was lost off Terschelling after striking a mine on 7 October 1917.
Design
Type U 93 submarines were preceded by the shorter Type U 87 submarines. U-106 had a displacement of when at the surface and while submerged. She had a total length of, a pressure hull length of, a beam of, a height of, and a draught of. The submarine was powered by two engines for use while surfaced, and two engines for use while submerged. The boat had two propeller shafts and two propellers. The boat was capable of operating at depths of up to.The submarine had a maximum surface speed of and a maximum submerged speed of. When submerged, she could operate for at ; when surfaced, she could travel at. U-106 was fitted with six torpedo tubes, twelve to sixteen torpedoes, one SK L/45, and one SK L/30 deck gun. She had a complement of thirty-six.