German submarine U-806 was a Type IXC/40 U-boat built for Nazi Germany's Kriegsmarine during World War II.
U-801 was ordered on 10 April 1941 from DeSchiMAG Seebeckwerft in Geestemünde under the yard number 364. Her keel was laid down on 27 April 1943 and the U-boat was launched sometime late in 1943. On 29 April 1944 she was commissioned into service under the command of Kapitänleutnant Klaus Hornbostel (Crew 34) in the 4th U-boat Flotilla.
German Type IXC/40 submarines were slightly larger than the original Type IXCs. U-806 had a displacement of 1144t when at the surface and 1257t while submerged. The U-boat had a total length of 76.76m (251.84feet), a pressure hull length of 58.75m (192.75feet), a beam of 6.86m (22.51feet), a height of 9.6m (31.5feet), and a draught of 4.67m (15.32feet). The submarine was powered by two MAN M 9 V 40/46 supercharged four-stroke, nine-cylinder diesel engines producing a total of 4400PS for use while surfaced, two Siemens-Schuckert 2 GU 345/34 double-acting electric motors producing a total of 1000shp for use while submerged. She had two shafts and two 1.92abbr=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-806 was fitted with six 53.30NaN0 torpedo tubes (four fitted at the bow and two at the stern), 22 torpedoes, one 10.52NaN2 SK C/32 naval gun, 180 rounds, and a 3.7cm (01.5inches) Flak M42 as well as two twin 2sp=usNaNsp=us C/30 anti-aircraft guns. The boat had a complement of forty-eight.
After work up for deployment in the Baltic Sea, U-806 transferred to the 33rd U-boat Flotilla for front-line service on 1 November 1944. She left Kiel for her first - and only - war patrol on 30 October. On the way to her assigned operational area off Canada she stopped at Horten Naval Base and Kristiansand. While operating against convoy HX 327 in late December 1944, U-806 sank two ships, the British steamer of, and the Canadian escort HMCS Clayoquot on 21 and 24 December respectively. An attack on another Canadian escort, HMCS Transcona, failed.
Two months later, U-806 returned to base via Norway, arriving in Flensburg on 27 February 1945. Spending the rest of the war in training, U-806 ran aground on Hatter Reef on 5 May 1945 and had to be towed free by a tug the next day. She arrived in Aarhus later that day in order to surrender to the Allies.
On 22 June 1945 the U-boat was transferred to Loch Ryan via Fredericia, Kiel, and Wilhelmshaven, arriving in Scotland on 26 June. On 21 December 1945, as part of Operation Deadlight, U-806 left Loch Ryan under tow from to be sunk by by artillery.
| Date | Ship Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 21 December 1944 | Samtucky |  United Kingdom | 7,219 | Damaged | |
| 24 December 1944 | 672 | Sunk |