German submarine U-667

German submarine U-667 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 16 August 1941 by Deutsche Werft, Hamburg as yard number 816, launched on 29 August 1942 and commissioned on 21 October 1942 under Oberleutnant zur See Heinrich Schroeteler.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-667 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-667 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 two twin 2 cm C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.

Service history
The boat's career began with training at 5th U-boat Flotilla on 21 October 1942, followed by active service on 1 June 1943 as part of the 7th Flotilla for the remainder of her service.

In five patrols she sank one merchant ship, for a total of and 2 warships. She also cause one warship total loss.

Wolfpacks
U-667 took part in five wolfpacks, namely:
 * Coronel (4 – 8 December 1943)
 * Coronel 2 (8 – 14 December 1943)
 * Coronel 3 (14 – 17 December 1943)
 * Borkum (18 – 26 December 1943)
 * Preussen (13 – 22 March 1944)

Fate
U-667 sunk on 26 August 1944 in the Bay of Biscay in position 46.06667°N, -1.05°W, when she struck a mine. All hands were lost.