German submarine U-315 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. The submarine was laid down on 7 July 1942 at the Flender Werke yard at Lübeck as yard number 315, launched on 29 May 1943 and commissioned on 10 July under the command of Oberleutnant zur See Herbert Zoller.
During her career, the U-boat sailed on 11 combat patrols, sinking one ship and causing another to be declared a total loss, before she surrendered on 9 May 1945.
She was a member of thirteen wolfpacks.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-315 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 Garbe, Lahmeyer & Co. RP 137/c 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-315 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.
The boat's service life began with training with the 8th U-boat Flotilla from 10 July 1943. She was then transferred to the 11th flotilla for operations on 1 March 1944. She was reassigned to the 13th flotilla on 15 September 1944.
The boat made the short journey from Kiel in Germany to Bergen in Norway, in February 1944.
The submarine's first patrol began with her departure from Bergen on 21 February 1944. After covering the Norwegian and Barents seas, she docked at Narvik on 9 March.
A similar pattern now became apparent, except her sixth sortie took the U-boat to the entrance to Murmansk in the Soviet Union.
U-315s seventh foray was, at five days, her shortest; starting in Bogenbucht (west of Narvik), on 29 September 1944 and finishing in Hammerfest on 3 October.
Her eighth patrol was fairly routine, after which she moved from Kilbotn to Skjomenfjord in November 1944.
The boat's ninth patrol was much the same as her eighth, passing north of Bear Island between 29 and 30 November 1944.
Patrol number 10 took the submarine to the gap between the Faroe and Shetland Islands.
What turned out to be U-315s last patrol was her longest (69 days) and most successful. On 22 March 1945, she sank the Empire Kingsley northwest of Lands End. In the same area, she torpedoed on 29 March. The Canadian frigate lost 60feet of her stern and although she did not sink, was declared a total loss.
The boat surrendered in Trondheim at war's end. There, she was broken up in March 1947.
| Date | Ship Name | Nationality | Tonnage[1] | Fate[2] | |
|---|---|---|---|---|---|
| 22 March 1945 | Empire Kingsley |  United Kingdom | 6,996 | Sunk | |
| 29 March 1945 | HMCS Teme | 1,370 | Total loss |