German submarine U-291 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.
The submarine was laid down on 17 October 1942 at the Bremer Vulkan yard at Bremen-Vegesack as yard number 56. She was launched on 30 June 1943 and commissioned on 4 August under the command of Oberleutnant zur See Hans Keerle.
She carried out no patrols and did not sink or damage any ships.
The boat surrendered on 5 May 1945 at Cuxhaven. She was sunk as part of Operation Deadlight on 20 December 1945.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-291 had a displacement of 769t when at the surface and 871t 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 AEG GU 460/8–27 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-291 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 twin 2sp=usNaNsp=us C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
U-291 served with the 21st U-boat Flotilla for training from 4 to 31 August 1943 and was a Trials boat with the 23rd flotilla from 1 September 1943 until 1 July 1944. She then worked as a 'school' boat from 1 July 1944 to 28 February 1945 with the 21st flotilla once more. Her last assignment was with the 31st flotilla from 1 March to 8 May 1945.
The submarine capitulated at Cuxhaven on 5 May 1945. She was transferred from Wilhelmshaven to Loch Ryan in Scotland for Operation Deadlight on 24 June and was sunk by the guns of [1] off Northern Ireland on 20 December 1945.