She was ordered on 20 January 1941, and was laid down on 29 October 1941 at Oderwerke AG, Stettin, as yard number 822. She was launched on 20 February 1944 and commissioned under the command of Oberleutnant zur See Josef Elsinghorst on 1 July 1944.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-822 had a displacement of 769 tonnes when at the surface and 871 tonnes while submerged. She had a total length of 67.10 m , a pressure hull length of 50.50 m , a beam of 6.20 m , a height of 9.60 m , and a draught of 4.74 m . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower for use while surfaced, two BBC GG UB 720/8 double-acting electric motors producing a total of 750 metric horsepower for use while submerged. She had two shafts and two 1.23 m propellers. The boat was capable of operating at depths of up to 230 metres .
Copyright: CC 3.0