German submarine U-270 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 15 October 1941 at the Bremer-Vulkan-Vegesacker Werft (yard) in Bremen as yard number 35. She was launched on 11 July 1942 and commissioned on 5 September under the command of Oberleutnant zur See Paul-Fredrich Otto.
In six patrols, she caused one British warship of 1370 tons to be declared a total loss. She was a member of seven wolfpacks.
She was sunk on 13 August 1944 in the Bay of Biscay by an Australian aircraft.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-270 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-270 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, and two twin 2sp=usNaNsp=us C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
After training with the 8th U-boat Flotilla, the boat became operational on 1 April 1943 when she was transferred to the 6th flotilla.
U-270s first patrol began when she departed Kiel on 23 March 1943. She entered the Atlantic Ocean after negotiating the gap between Iceland and the Faroe Islands. Two crew members were injured in bad weather on 4 April. She then docked at the French Atlantic port of St. Nazaire on 15 May.
For her second sortie, the boat moved through the Atlantic waters off northwest Spain.
She attacked the British frigate which caused the warship to be declared a total loss. During an attack on a convoy in mid-Atlantic, the boat's pressure hull was cracked by depth charges dropped by the escorts; the submarine was forced to return to base.
U-270 was attacked by a British B-17 Flying Fortress on 6 January 1944 and succeeded in shooting the aircraft down, but not before sufficient damage was caused to force the U-boat to curtail the patrol.
The submarine was returning to base after being attacked and badly damaged by a Vickers Wellington of No. 172 Squadron RAF, when she was attacked by a second Fortress, this time from 53 Squadron. This B-17 was also shot down, but did not cause any further damage to the boat. Among the casualties here were Bert Peters, a former Victorian Football League player.
U-270 departed Lorient for the last time on 10 August 1944. In the Bay of Biscay, she was attacked and sunk by an Australian Sunderland flying boat of No. 461 Squadron RAAF on the 13th.
There were no deaths; seventy-one men survived. The German version of U 270 reports of 10 men dead and 71 survived; the boat was overloaded with staff, being evacuated. U 270
U-270 took part in seven wolfpacks, namely: