German submarine U-476

German submarine U-476 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II.

She carried out one patrol. She sank no ships.

She was damaged by a British aircraft northwest of Trondheim on 24 May 1944, then scuttled by a German U-boat on 25 May 1944.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-476 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 Siemens-Schuckert GU 343/38–8 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-476 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), one 3.7 cm Flak M42 and two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.

Service history
The submarine was laid down on 19 September 1942 at the Deutsche Werke in Kiel as yard number 307, launched on 5 June 1943 and commissioned on 28 July under the command of Oberleutnant zur See Otto Niethmann.

She served with the 5th U-boat Flotilla from 28 July 1943 for training and the 3rd flotilla from 1 April 1944 for operations.

Patrol and loss
U-476's only patrol was preceded by a short trip from Kiel in Germany to Bergen in Norway. The patrol itself began with the boat's departure from Bergen on 20 May 1944.

On the 24th she was attacked by a British PBY Catalina flying boat of No. 210 Squadron RAF. The damage inflicted was so serious that GS U-990 scuttled the boat with a torpedo the following day. U-990 had also rescued the survivors, but salvation was short-lived; she was sunk later-on, on the 25th.

Thirty-four men went down with U-476; there were twenty-one survivors.