German submarine U-606

German submarine U-606 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 12 March 1941 by Blohm & Voss, Hamburg as yard number 582, launched on 27 November 1941 and commissioned on 22 January 1942 under Oberleutnant zur See Hans Klatt.

Design
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-606 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 Brown, Boveri & Cie GG UB 720/8 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-606 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 5th U-boat Flotilla on 22 January 1942, followed by active service on 1 September 1942 as part of the 11th Flotilla. After just two months, on 1 November 1942, she transferred to 9th Flotilla.

In three patrols she sank three merchant ships, for a total of, plus 2 merchant ships damaged for a total of 21,925 GRT.

Convoy ON 166
Along with GS U-92 (1942), GS U-186, GS U-225, GS U-332, GS U-529, GS U-600, GS U-604, GS U-623, GS U-628, GS U-653 and GS U-753 she attacked Convoy ON 166 and was very successful sinking the British Empire Redshank and US ship Chattanooga City and damaging US ship Expositor (finished by GS U-303) on 22 February, before being damaged by depth charges launched from the destroyer ORP Burza.

Wolfpacks
U-606 took part in five wolfpacks, namely:
 * Puma (26 – 29 October 1942)
 * Natter (30 October – 8 November 1942)
 * Kreuzotter (8 – 24 November 1942)
 * Falke (8 – 19 January 1943)
 * Haudegen (19 January – 15 February 1943)

Fate
U-606 was sunk on 22 February 1943 in the North Atlantic in position 47.73333°N, -33.71667°W. She was damaged and forced to submerge by depth charges from Polish destroyer ORP Burza, then she was found by USCGC Campbell (WPG-32) and attacked with depth charges and gunfire. Older publications claimed, that the Campbell also rammed U-606, but apparently some U-boat had just collided with the Campbell, and it is not clear if it was U-606. There were 36 dead and 12 survivors (5 by the Campbell and 7 by the Burza). U-606 finally sunk on 23 February near dawn.