German submarine U-1000 was a Type VIIC/41 U-boat built during World War II for service in Nazi Germany's Kriegsmarine.
German Type VIIC/41 submarines were preceded by the heavier Type VIIC submarines. U-1000 had a displacement of 759t when at the surface and 860t while submerged. She had a total length of 67.1m (220.1feet), a pressure hull length of 50.5m (165.7feet), a beam of 6.2m (20.3feet), a height of 9.6m (31.5feet), and a draught of 4.74m (15.55feet). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of NaNPS for use while surfaced, two Brown, Boveri & Cie GG UB 720/8 double-acting electric motors producing a total of 750PS for use while submerged. She had two shafts and two 1.23abbr=onNaNabbr=on 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, the boat could operate for at ; when surfaced, she could travel at . U-1000 was fitted with five 53.30NaN0 torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.82NaN2 SK C/35 naval gun, (220 rounds), one 3.7cm (01.5inches) Flak M42 and two 2sp=usNaNsp=us C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
She was completed in Hamburg in November 1943, and after working up trials was moved to Egersund in Norway in June 1944. From there she conducted her only war patrol in the waters off Norway, in the North Sea and towards the Arctic Circle, but found no enemy ships to target, returning to Bergen without firing a shot. She did however manage to recover two Norwegian airmen of the British Royal Air Force, whose Mosquito aircraft had been shot down by two days before they were rescued from the sea.
On the 9 August, U-1000 was detailed to serve in the Baltic Sea against Soviet shipping, which was beginning to press into German waters as the Red Army advanced on land.
On the 31 August 1944, as she passed the East Prussian town of Pillau on her way to Reval, she struck a sea mine laid by the Royal Air Force. The mine crippled the submarine, which limped into Pillau in a wrecked state. All the crew survived the blast, but the boat was totally unserviceable and was abandoned in Pillau, the crew being transferred to, on board which they were all killed the following year. RAF aircraft frequently mined German coastal waters, as they knew the routes used by German shipping, and could thus severely restrict German movement by sea with the use of air-dropped minefields.