German submarine U-745

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History
Nazi Germany
Name: U-745
Ordered: 5 June 1941
Builder: Schichau-Werke, Danzig
Yard number: 1548
Laid down: 8 July 1942
Launched: 16 April 1943
Commissioned: 19 June 1943
Fate: Lost at sea on 30 January 1945 off the Gulf of Finland
General characteristics
Class and type: Type VIIC submarine
Displacement:
  • 769 tonnes (757 long tons) surfaced
  • 871 t (857 long tons) submerged
Length:
Beam:
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Height: 9.60 m (31 ft 6 in)
Draught: 4.74 m (15 ft 7 in)
Installed power:
  • 2,800–3,200 PS (2,100–2,400 kW; 2,800–3,200 bhp) (diesels)
  • 750 PS (550 kW; 740 shp) (electric)
Propulsion:
Speed:
  • 17.7 knots (32.8 km/h; 20.4 mph) surfaced
  • 7.6 knots (14.1 km/h; 8.7 mph) submerged
Range:
  • 8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:
  • 230 m (750 ft)
  • Crush depth: 250–295 m (820–968 ft)
Complement: 4 officers, 40–56 enlisted
Armament:
Service record[1]
Part of:
Commanders:
  • Kapt.z.S. Wilhelm von Trotha
  • 19 June 1943 – 31 January 1945
Operations:
  • 1st patrol: 9 June – 7 July 1944
  • 2nd patrol: 23–27 August 1944
  • 3rd patrol: 11 September – 20 October 1944
  • 4th patrol: 23 December 1944 – 31 January 1945
Victories:
  • 1 warship sunk (600 tons)
  • 1 auxialiary warship sunk (140 GRT)

U-745 was a Type VIIC U-Boat built for Nazi Germany's Kriegsmarine for service during World War II, and which was lost at sea on 30 January 1945.

U-745 was launched on 16 April 1943, under the command of Wilhelm von Trotha, who would remain its commanding officer for its entire service. U-745 had a crew of 45.

Design[edit]

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-745 had a displacement of 769 tonnes (757 long tons) when at the surface and 871 tonnes (857 long tons) while submerged.[2] 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 460/8–27 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).[2]

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).[2] 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-745 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 an anti-aircraft gun. The boat had a complement of between forty-four and sixty.[2]

Service history[edit]

She undertook four patrols during her service, and sank one allied auxiliary ship, the Soviet minesweeping trawler T-45 Antikajnen (No 48), and one allied warship, the Soviet fleet minesweeper T-76 Korall.

Fate[edit]

On 30 January 1945, she was lost with all hands in the Gulf of Finland, probably having sunk by a mine laid by the Finnish minelayers Louhi and Ruotsinsalmi on 12 January 1945.

Wilhelm von Trotha's body was later found near Föglö, Finland, and was buried three days later. No other bodies were recovered. Unlike most U-Boats, which suffered casualties during the course of service due to accidents or other causes, U-745 suffered no casualties at all, until the time of her disappearance.

In late 2012 the Finnish diving team 'Badewanne', after 10 years of searching, reported they had found both U-676 and U-745 in the Gulf of Finland south of Hanko.[1]

Summary of raiding history[edit]

Date Ship Name Nationality Displacement. Fate[3]
26 August 1944 T-45 Antikajnen (No. 48)  Soviet Navy 140 Sunk
11 January 1945 T-76 Korall  Soviet Navy 600 Sunk

References[edit]

  1. ^ a b Helgason, Guðmundur. "The Type VIIC boat U-745". German U-boats of WWII - uboat.net. Retrieved 16 October 2014. 
  2. ^ a b c d Gröner 1991, pp. 43-46.
  3. ^ Helgason, Guðmundur. "Ships hit by U-745". German U-boats of WWII - uboat.net. Retrieved 10 February 2014. 

Bibliography[edit]

  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945. Der U-Boot-Krieg (in German). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2. 
  • Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4. 

External links[edit]

Coordinates: 59°30′N 23°00′E / 59.500°N 23.000°E / 59.500; 23.000