German submarine U-421

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Career (Nazi Germany)
Name: U-421
Ordered: 10 April 1941
Builder: Danziger Werft AG, Danzig
Yard number: 122
Laid down: 20 January 1942
Launched: 24 September 1942
Commissioned: 13 January 1943
Fate: Sunk 29 April 1944 in the Mediterranean in position 43°07′N 05°55′E / 43.117°N 5.917°E / 43.117; 5.917 in an air raid by US aircraft.
General characteristics [1]
Class and type: Type VIIC submarine
Displacement: 769 tonnes (757 long tons) surfaced
871 t (857 long tons) submerged
Length: 67.1 m (220 ft 2 in) o/a
50.5 m (165 ft 8 in) pressure hull
Beam: 6.2 m (20 ft 4 in) o/a
4.7 m (15 ft 5 in) pressure hull
Draft: 4.74 m (15 ft 7 in)
Propulsion: 2 × supercharged Germaniawerft 6-cylinder 4-stroke F46 diesel engines, totalling 2,800–3,200 PS (2,800–3,200 bhp; 2,100–2,400 kW). Max rpm: 470-490
2 × BBC GG UB 720/8 electric motors, totalling 750 PS (740 shp; 550 kW) and max rpm: 296
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: 44–52 officers & ratings
Armament:
Service record[2]
Part of: 8th U-boat Flotilla
(13 January 1943 - 31 October 1943) - Training
9th U-boat Flotilla
(1 November 1943 - 31 March 1944)
29th U-boat Flotilla
(1 April 1944 - 29 April 1944)
Commanders: Lt.z.S. Hans Kolbus
(13 January 1943 - 29 April 1944)
Operations: 1st patrol:
6 November 1943 - 8 January 1944
2nd patrol:
19 February - 1 April 1944
Victories: None

German submarine U-421 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 20 January 1942 by Danziger Werft AG, Danzig as yard number 122, launched on 24 September 1942 and commissioned on 13 January 1943 under Leunant zur See Hans Kolbus.

Service History[edit]

The boat's career began with training at 8th U-boat Flotilla on 13 January 1943, followed by active service on 1 November 1943 as part of the 9th Flotilla. On 1 April 1944, she transferred to 29th Flotilla for operations in the Mediterranean for the remainder of her service.

In 2 patrols she sank no ships.

Wolfpacks[edit]

U-421 took part in in six wolfpacks, namely

  • Coronel (4–8 December 1943)
  • Coronel 1 (8–14 December 1943)
  • Coronel 2 (14–17 December 1943)
  • Föhr (18–23 December 1943)
  • Rügen 6 (23–26 December 1943)
  • Hela (28 December 1943 – 1 January 1944)

Fate[edit]

U-421 was sunk on 29 April 1944 in the Mediterranean in position 43°07′N 05°55′E / 43.117°N 5.917°E / 43.117; 5.917 at the Military port of Toulon, France, in an air raid by US aircraft.

See also[edit]

References[edit]

  1. ^ Gröner 1985, pp. 72-74.
  2. ^ Helgason, Guðmundur. "The Type VIIC boat U-421". German U-boats of WWII - uboat.net. Retrieved 7 September 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 (1985). U-Boote, Hilfskreuzer, Minenschiffe, Netzleger, Sperrbrecher. Die deutschen Kriegsschiffe 1815-1945 (in German) III (Koblenz: Bernard & Graefe). ISBN 3-7637-4802-4. 
  • Sharpe, Peter (1998). U-Boat Fact File. Great Britain: Midland Publishing. ISBN 1-85780-072-9. 

External links[edit]