|Ordered:||10 April 1941|
|Laid down:||9 July 1942|
|Launched:||11 March 1943|
|Commissioned:||4 May 1943|
|Fate:||Damaged beyond repair by US bombs in December 1943; mined off Warenmünde (Rostock) December 1945|
|Class and type:||Type VIIC submarine|
|Height:||9.60 m (31 ft 6 in)|
|Draught:||4.74 m (15 ft 7 in)|
|Complement:||4 officers, 40–56 enlisted|
She carried out no patrols. She did not sink or damage any ships.
She was damaged beyond repair, December 1943 and mined, December 1945.
German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-345 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged. She had a total length of 67.10 m (220 ft 2 in), a pressure hull length of 50.50 m (165 ft 8 in), a beam of 6.20 m (20 ft 4 in), a height of 9.60 m (31 ft 6 in), and a draught of 4.74 m (15 ft 7 in). The submarine was powered by two Germaniawerft F46 four-stroke, six-cylinder supercharged diesel engines producing a total of 2,800 to 3,200 metric horsepower (2,060 to 2,350 kW; 2,760 to 3,160 shp) for use while surfaced, two AEG GU 460/8-276 double-acting electric motors producing a total of 750 metric horsepower (550 kW; 740 shp) for use while submerged. She had two shafts and two 1.23 m (4 ft) propellers. The boat was capable of operating at depths of up to 230 metres (750 ft).
The submarine had a maximum surface speed of 17.7 knots (32.8 km/h; 20.4 mph) and a maximum submerged speed of 7.6 knots (14.1 km/h; 8.7 mph). When submerged, the boat could operate for 80 nautical miles (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph); when surfaced, she could travel 8,500 nautical miles (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph). U-345 was fitted with five 53.3 cm (21 in) torpedo tubes (four fitted at the bow and one at the stern), fourteen torpedoes, one 8.8 cm (3.46 in) SK C/35 naval gun, 220 rounds, and four twin 2 cm (0.79 in) C/30 anti-aircraft guns. The boat had a complement of between forty-four and sixty.
The submarine was laid down on 9 July 1942 at the Nordseewerke yard at Emden as yard number 217, launched on 11 March 1943 and commissioned on 4 May under the command of Oberleutnant zur See Ulrich Knackfuß. U-345 served with the 8th U-boat Flotilla from 4 May 1943. She was hit during a USAAF raid on Kiel on 13 December 1943. The damage was severe enough that she was paid off on the 23rd. After the German surrender in May 1945, she was mined off Warnemünde, (north of Rostock), in December.
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