# German submarine U-315

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.

## Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-315 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 Garbe, Lahmeyer & Co. RP 137/c 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-315 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.

## Service history

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.

### First patrol

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.

### Second to sixth patrols

A similar pattern now became apparent, except her sixth sortie took the U-boat to the entrance to Murmansk in the Soviet Union.

### Seventh, eighth and ninth patrols

U-315's 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.

### Tenth patrol

Patrol number 10 took the submarine to the gap between the Faroe and Shetland Islands.

### Eleventh patrol

What turned out to be U-315's 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 HMCS Teme on 29 March. The Canadian frigate lost 60 ft (18 m) of her stern and although she did not sink, was declared a total loss.

### Fate

The boat surrendered in Trondheim at war's end. There, she was broken up in March 1947.

## Summary of raiding history

| Date | Ship Name | Nationality | Tonnage | Fate |
| 22 March 1945 | Empire Kingsley | United Kingdom | 6,996 | Sunk |
| 29 March 1945 | HMCS Teme | Royal Canadian Navy | 1,370 | Total loss |