German submarine U-1000

German submarine U-1000 was a Type VIIC/41 U-boat built during World War II for service in the Battle of the Atlantic.

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 GS U-804 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 25 August, 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 GS U-3523, on board which they were all killed the following year. RAF aircraft regularly 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.