During the Second World War, the German Navy built over a thousand U-boats or submarines for service in the Battle of the Atlantic and elsewhere. Although the majority of these had active service careers, and 784 of them were lost at sea, there were still several hundred boats which were never completed or completed too late to see any war service. These boats were sometime solely commissioned as training craft, or were too badly damaged by bombing to be worth completion. Most however were finished in the last six months of the war and never had time or enough fuel to complete their training programs. These boats remained in German harbours up until April/May 1945, when most were taken out to sea by skeleton crews and scuttled to prevent the allies capturing them. The boats that were captured were taken by the Allies to Loch Ryan in Scotland and Lisahally in Northern Ireland. Some were presented to allied navies for commissioning or experiments, but the majority of captured U-boats were towed out to sea in the autumn of 1945 and sunk by gunfire in Operation Deadlight.
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Another source states that as of March 1951 B-27 was assigned to the 158th Submarine Brigade of the 27th Submarine Division; she was converted to floating charging station PZS-34 on January 18, 1956. On 25 March 1958 she was struck from the Soviet Navy and sold for scrap. [1]
Another source claims that B-29 was redesignated as PZS-35 and became experimental hulk B-100 on July 2, 1958. Struck from the Soviet Navy on September 25, 1959 and sold for scrap on November 30. [2]
Conflicting information exists for the rest of her career: one source states that she was sent to the reserve fleet on December 29, 1955 and redesignated as floating submarine battery charging station PZS-35 on January 18, 1956. Redesignated as test hulk B-100 on July 2, 1958. Struck from the Soviet Navy on September 25, 1959 and scrapped on November 30.
Another source stated that as of March 1951 she was assigned to the 27th Submarine Division, 158th Submarine Brigade and redesignated as test hulk BSh-28 on June 10, 1955 and stationary training submarine UTS-3 on January 9, 1957. Struck from the Soviet Navy on September 1, 1972 and sold for scrap on February 5, 1973. [3]