German submarine U-433

Summary

German submarine U-433 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 4 January 1940 by Schichau-Werke, Danzig as yard number 1474, launched on 15 March 1941 and commissioned on 24 May 1941 under Oberleutnant zur See Hans Ey.

History
Nazi Germany
NameU-433
Ordered23 September 1939
BuilderSchichau-Werke, Danzig
Yard number1474
Laid down4 January 1940
Launched15 March 1941
Commissioned24 May 1941
FateSunk on 16 November 1941 in the Mediterranean in position 36°13′N 04°42′W / 36.217°N 4.700°W / 36.217; -4.700, by depth charges from HMS Marigold.
General characteristics
Class and typeType VIIC submarine
Displacement
Length
Beam
  • 6.20 m (20 ft 4 in) o/a
  • 4.70 m (15 ft 5 in) pressure hull
Draught4.74 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)
Complement4 officers, 40–56 enlisted
Armament
Service record[1]
Part of:
Identification codes: M 41 779
Commanders:
  • Oblt.z.S. Hans Ey
  • 24 May – 16 November 1941
Operations:
  • 2 patrols:
  • 1st patrol:
  • a. 25 August – 25 September 1941
  • b. 4 – 6 November 1941
  • 2nd patrol:
  • 8 – 16 November 1941
Victories: 1 merchant ship damaged
(2,215 GRT)

Design edit

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-433 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-433 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 a 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty.[2]

Service history edit

The boat's career began with training at 3rd U-boat Flotilla on 24 May 1941, and continuing with active service on 1 August 1941 as part of the 3rd Flotilla for the remainder of her service.

In two patrols she damaged one merchant ship, for a total of 2,215 gross register tons (GRT).

Wolfpacks edit

U-433 took part in two wolfpacks, namely:

  • Markgraf (28 August – 16 September 1941)
  • Arnauld (8 – 16 November 1941)

Fate edit

U-433 was sunk on 16 November 1941 in the Mediterranean E of Gibraltar, in position 36°13′N 04°42′W / 36.217°N 4.700°W / 36.217; -4.700, by depth charges and gunfire from Royal Navy corvette HMS Marigold. There were 6 dead and 38 survivors.

Summary of raiding history edit

Date Ship Name Nationality Tonnage
(GRT)
Fate[3]
11 September 1941 Bestum   Norway 2,215 Damaged

See also edit

References edit

  1. ^ Helgason, Guðmundur. "The Type VIIC boat U-433". German U-boats of WWII - uboat.net. Retrieved 11 September 2014.
  2. ^ a b c d Gröner 1991, pp. 43–46.
  3. ^ Helgason, Guðmundur. "Ships hit by U-433". German U-boats of WWII - uboat.net. Retrieved 11 September 2014.

Bibliography edit

  • Busch, Rainer; Röll, Hans-Joachim (1999). German U-boat commanders of World War II : a biographical dictionary. Translated by Brooks, Geoffrey. London, Annapolis, Md: Greenhill Books, Naval Institute Press. ISBN 1-55750-186-6.
  • Busch, Rainer; Röll, Hans-Joachim (1999). Deutsche U-Boot-Verluste von September 1939 bis Mai 1945 [German U-boat losses from September 1939 to May 1945]. Der U-Boot-Krieg (in German). Vol. 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. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
  • Sharpe, Peter (1998). U-Boat Fact File. Great Britain: Midland Publishing. ISBN 1-85780-072-9.

External links edit

  • Helgason, Guðmundur. "The Type VIIC boat U-433". German U-boats of WWII - uboat.net. Retrieved 26 December 2014.
  • Hofmann, Markus. "U 433". Deutsche U-Boote 1935-1945 - u-boot-archiv.de (in German). Retrieved 26 December 2014.