German submarine U-411

German submarine U-411 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 28 January 1941 by Danziger Werft, Danzig as yard number 112, launched on 15 November 1941 and commissioned on 18 March 1942 under Oberleutnant zur See Gerhard Litterscheid.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-411 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 six-cylinder supercharged diesel engines producing a total of 2800 to 3200 PS for use while surfaced, two Siemens-Schuckert GU 343/38-8double-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-411 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 a 2 cm C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.

Service history
The boat's career began with training at 8th U-boat Flotilla on 18 March 1942, followed by active service on 1 September 1942 as part of the 6th Flotilla for the remainder of her service.

In two patrols she sank no ships.

Wolfpacks
U-411 took part in three wolfpacks, namely:
 * Vorwärts (25 August – 18 September 1942)
 * Westwall (8 – 9 November 1942)
 * Schlagetot (9 – 13 November 1942)

Fate
U-411 was sunk on 13 November 1942 in the North Atlantic, west of Gibraltar, in position 36°N, -9.88333°W, by depth charges from a RAF Hudson bomber. All hands were lost.