German submarine U-706

German submarine U-706, a type VIIC U-boat, was laid down on 22 November 1940. She was launched on 24 November 1941 and commissioned on 16 March 1942.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-706 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 Garbe, Lahmeyer & Co. RP 137/c 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-706 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
U-706 was commanded by Korvettenkapitän Alexander von Zitzewitz. She was attached to the 5th Flotilla from 16 March until 30 September 1942. On 1 October 1942, she was transferred to the 3rd Flotilla and made five patrols during the war, sinking three ships with a total tonnage of. On 2 August 1943, while in Bay of Biscay, she was disabled by depth charges from a Canadian Hampden aircraft, then finished off by a US Liberator aircraft from A/S Sqdn. 4. She sank at position 46.25°N, -10.41667°W.

Wolfpacks
U-706 took part in ten wolfpacks, namely:
 * Luchs (1 – 6 October 1942)
 * Panther (6 – 20 October 1942)
 * Südwärts (24 – 26 October 1942)
 * Falke (28 December 1942 – 4 January 1943)
 * Jaguar (18 – 31 January 1943)
 * Seeteufel (23 – 30 March 1943)
 * Löwenherz (1 – 10 April 1943)
 * Lerche (10 – 16 April 1943)
 * Meise (16 – 22 April 1943)
 * Specht (22 April – 4 May 1943)