German submarine U-705
German submarine U-705 was a Type VIIC U-boat of Nazi Germany's Kriegsmarine during World War II. Commissioned on 30 December 1941, she served with the 5th U-boat Flotilla until 31 July 1942 as a training boat, and as a front boat of 6th U-boat Flotilla under the command of Oberleutnant zur See Karl-Horst Horn, until her sinking on 3 September 1942. Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-705 had a displacement of  when at the surface and  while submerged. She had a total length of , a pressure hull length of , a beam of , a height of , and a draught of . The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of  for use while surfaced, two AEG GU 460/8–27 double-acting electric motors producing a total of  for use while submerged. She had two shafts and two  propellers. The boat was capable of operating at depths of up to . The submarine had a maximum surface speed of  and a maximum submerged speed of . When submerged, the boat could operate for  at ; when surfaced, she could travel  at . U-705 was fitted with five  torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one  SK C/35 naval gun, 220 rounds, and a  C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty. Service history
Departing on her first and only patrol on 1 August 1942, U-705 left Kiel to encircle the British Isles and turn back after crossing more than half of the Atlantic. On 15 August while cruising some  south-east of Iceland, she caught sight of a number of vessels; Convoy SC 95, and the merchant ship Balladier. Diving after first being seen, she stayed submerged for nearly four hours before firing a torpedo at the starboard side of the Balladier. Listing to the starboard side, the armed guards were unable to return fire on U-705, with the ship sinking after seven minutes. On 24 August, the Norwegian corvette  and  of convoy ON 122 located U-705. Dropping five depth charges from the Viscount, along with a further ten from the Potentilla, the two were unable to cause damage to the boat. A further fifty-seven charges were dropped at her and , finally damaging her stern torpedo tube. Fate
On 3 September 1942, Armstrong Whitworth Whitleys of No. 77 Squadron RAF dropped depth charges at U-705, causing her to sink with all hands lost in the Bay of Biscay. Wolfpacks
U-705 took part in one wolfpack, namely:
 Lohs (11 – 26 August 1942)

Summary of raiding history

References

Bibliography

External links

German Type VIIC submarines
U-boats commissioned in 1941
1941 ships
U-boats sunk in 1942
World War II submarines of Germany
Ships built in Hamburg
U-boats sunk by British aircraft
U-boats sunk by depth charges
World War II shipwrecks in the Atlantic Ocean
Shipwrecks in the Bay of Biscay
Submarines lost with all hands
Maritime incidents in September 1942