SM U-106
Introduction Construction schematic of the German WW I era submarine 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 German 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 (four at the bow and two at the stern), twelve to sixteen torpedoes, one  SK L/45, and one  SK L/30 deck gun. She had a complement of thirty-six (thirty-two crew members and four officers).
Wreck In 2009 the Royal Netherlands Navy found the wreckage of the ship north of Terschelling, while charting sea-routes. The news was made public in March 2011, after the ship's identity had been confirmed by German authorities and the crewmembers' families had been informed. The ship will stay in place as a wargrave.
Summary of raiding history DateNameNationalityTonnageFate18 September 1917957Sunk18 September 1917''City of Lincoln''5,867Damaged
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