German submarine U-273
|Ordered:||20 January 1941|
|Builder:||Bremer Vulkan, Bremen-Vegesack|
|Laid down:||5 December 1941|
|Launched:||2 September 1942|
|Commissioned:||21 October 1942|
|Fate:||Sunk, 19 May 1943 by a British aircraft|
|Class and type:||Type VIIC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
|Operations:||8–19 May 1943|
The submarine was laid down on 5 December 1941 at the Bremer Vulkan yard at Bremen-Vegesack as yard number 38, she was launched on 2 September 1942 and commissioned on 21 October under the command of Oberleutnant zur See Hans-Adolf Engel.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-273 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-273 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and two twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
U-273 sailed from Kiel under the command of Oblt.z.S. Hermann Rossmann, on 8 May 1943, arriving at Bergen, Norway, on 11 May. The next day she sailed out into the Atlantic on her first and only patrol and was sunk eight days later on 19 May with all hands, in position Coordinates: southwest of Iceland, by depth charges dropped from a Lockheed Hudson of No. 269 Squadron RAF.
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