German submarine U-22

German submarine U-22 was a Nazi German Type IIB U-boat which was commissioned in 1936 following construction at the Germaniawerft shipyards at Kiel. Her pre-war service was uneventful, as she trained crews and officers in the rapidly expanding U-boat arm of the Kriegsmarine following the abandonment of the terms of the Treaty of Versailles two years before.

German Type IIB submarines were enlarged versions of the original Type IIs. U-22 had a displacement of 279 tonnes when at the surface and 328 tonnes while submerged. Officially, the standard tonnage was 250 long tons , however. The U-boat had a total length of 42.70 m , a pressure hull length of 28.20 m , a beam of 4.08 m , a height of 8.60 m , and a draught of 3.90 m . The submarine was powered by two MWM RS 127 S four-stroke, six-cylinder diesel engines of 700 metric horsepower for cruising, two Siemens-Schuckert PG VV 322/36 double-acting electric motors producing a total of 460 metric horsepower for use while submerged. She had two shafts and two 0.85 m propellers. The boat was capable of operating at depths of up to 80–150 metres .

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