German submarine U-273

German submarine U-273 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

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.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-273 had a displacement of 769 t when at the surface and 871 t while submerged. She had a total length of 67.10 m, a pressure hull length of 50.50 m, a beam of 6.20 m, a height of 9.60 m, and a draught of 4.74 m. The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2800 to 3200 PS for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of 750 PS for use while submerged. She had two shafts and two 1.23 m propellers. The boat was capable of operating at depths of up to 230 m.

The submarine had a maximum surface speed of 17.7 kn and a maximum submerged speed of 7.6 kn. When submerged, the boat could operate for 80 nmi at 4 kn; when surfaced, she could travel 8500 nmi at 10 kn. U-273 was fitted with five 53.3 cm torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm SK C/35 naval gun, 220 rounds, and two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.

Service history
U-273 served with the 8th U-boat Flotilla for training from October 1942 to April 1943, and served operationally with the 9th U-boat Flotilla from 1 May 1943.

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 59.41667°N, -24.55°W southwest of Iceland, by depth charges dropped from a Lockheed Hudson of No. 269 Squadron RAF.