German submarine U-3505

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History
War ensign of Germany (1938-1945).svg Nazi Germany
NameU-3505
Ordered6 November 1943
Builder Schichau-Werke, Danzig
Yard number1650
Laid down9 July 1944
Launched25 August 1944
Commissioned7 October 1944
FateSunk on 3 April 1945
General characteristics
Class and type Type XXI submarine
Displacement
  • 1,621  t (1,595 long tons) surfaced
  • 2,100 t (2,067 long tons) submerged
Length76.70 m (251 ft 8 in) (o/a)
Beam8 m (26 ft 3 in)
Height11.30 m (37 ft 1 in)
Draught6.32 m (20 ft 9 in)
Propulsion
Speed
  • Surfaced:
  • 15.6 knots (28.9 km/h; 18.0 mph) (diesel)
  • 17.9 knots (33.2 km/h; 20.6 mph) (electric)
  • Submerged:
  • 17.2 knots (31.9 km/h; 19.8 mph) (electric)
  • 6.1 knots (11.3 km/h; 7.0 mph) (silent running motors)
Range
  • 15,500 nmi (28,700 km; 17,800 mi) at 10 knots (19 km/h; 12 mph) surfaced
  • 340 nmi (630 km; 390 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depth240 m (790 ft)
Complement5 officers, 52 enlisted
Sensors and
processing systems
Armament
Service record [1]
Part of:
Identification codes: M 46 656
Commanders:
Operations: None
Victories: None

German submarine U-3505 was a Type XXI submarine of Nazi Germany's Kriegsmarine during World War II. The U-boat was laid down on 9 July 1944 at the Schichau-Werke yard at Danzig, launched on 25 August 1944, and commissioned on 7 October 1944 under the command of Oberleutnant zur See Horst Willner. [1]

Contents

Design

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Like all Type XXI U-boats, U-3505 had a displacement of 1,621 tonnes (1,595 long tons) when at the surface and 1,819 tonnes (1,790 long tons) while submerged. She had a total length of 76.70 m (251 ft 8 in) (o/a), a beam of 8 m (26 ft 3 in), and a draught of 6.32 m (20 ft 9 in). [2] The submarine was powered by two MAN SE supercharged six-cylinder M6V40/46KBB diesel engines each providing 4,000 metric horsepower (2,900 kilowatts ; 3,900 shaft horsepower ), two Siemens-Schuckert GU365/30 double-acting electric motors each providing 5,000 PS (3,700 kW; 4,900 shp), and two Siemens-Schuckert silent running GV232/28 electric motors each providing 226 PS (166 kW; 223 shp). [2]

The submarine had a maximum surface speed of 15.6 knots (28.9 km/h; 18.0 mph) and a submerged speed of 17.2 knots (31.9 km/h; 19.8 mph). When running on silent motors the boat could operate at a speed of 6.1 knots (11.3 km/h; 7.0 mph). When submerged, the boat could operate at 5 knots (9.3 km/h; 5.8 mph) for 340 nautical miles (630 km; 390 mi); when surfaced, she could travel 15,500 nautical miles (28,700 km; 17,800 mi) at 10 knots (19 km/h; 12 mph). [2] U-3505 was fitted with six 53.3 cm (21.0 in) torpedo tubes in the bow and four 2 cm (0.79 in) C/30 anti-aircraft guns. She could carry twenty-three torpedoes or seventeen torpedoes and twelve mines. The complement was five officers and fifty-two men. [2]

Service history

Although never used in combat, the submarine achieved some degree of fame due to a rescue mission. Her commander, Captain Horst Willner, disguised his wife as a sailor and smuggled her aboard together with their three-month-old baby (a crime punishable by death). The captain's family was originally to be evacuated on MV Wilhelm Gustloff, joining a flood of refugees fleeing East Prussia ahead of the advancing Red Army, in "Operation Hannibal". Willner cancelled their places and took them onto his submarine, and so probably saved their lives since Gustloff was sunk by the Soviet submarine S-13 with the greatest loss of life in maritime history.

After leaving Danzig they went to Gotenhafen, where they took on board 110 children and adolescents. The refugees, including the captain's family, were safely delivered at Travemünde, Lübeck on 2 April 1945.

Returning to Kiel, U-3505 was to participate in torpedo exercises, but on 3 April was sunk in a bombing raid while in harbour. At least one sailor was killed.

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References

  1. 1 2 Helgason, Guðmundur. "The Type XXI boat U-3505". German U-boats of WWII - uboat.net. Retrieved 23 March 2010.
  2. 1 2 3 4 Gröner 1991, p. 85.

Bibliography

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