German submarine U-989

Last updated
History
War ensign of Germany (1938-1945).svg Nazi Germany
NameU-989
Ordered25 May 1941
Builder Blohm & Voss, Hamburg
Yard number189
Laid down17 October 1942
Launched16 June 1943
Commissioned22 July 1943
FateSunk on 14 February 1945 in the North Atlantic in position 61°36′N01°35′W / 61.600°N 1.583°W / 61.600; -1.583 , by depth charges from HMS Bayntun, HMS Braithwaite, HMS Loch Eck and HMS Loch Dunvegan.
General characteristics
Class and type Type 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 54 065
Commanders:
  • Oblt.z.S. / Kptlt. Hardo Rodler von Roithberg
  • 22 July 1943 – 14 February 1945
Operations:
  • 5 patrols:
  • 1st patrol:
  • 11 January – 4 March 1944
  • 2nd patrol:
  • 6 – 8 June 1944
  • 3rd patrol:
  • 8 – 10 July 1944
  • 4th patrol:
  • a. 9 August – 26 September 1944
  • b. 28 September – 3 October 1944
  • c. 3 – 5 February 1945
  • 5th patrol:
  • 7 – 14 February 1945
Victories:
  • 1 merchant ship sunk
    (1,791  GRT)
  • 1 merchant ship damaged
    (7,176  GRT)

German submarine U-989 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 17 October 1942 by Blohm & Voss, Hamburg as yard number 189, launched on 16 June 1943 and commissioned on 22 July 1943 under Oberleutnant zur See Hardo Rodler von Roithberg.

Contents

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-989 displaced 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 Brown, Boveri & Cie GG UB 720/8 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-989 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 one twin 2 cm (0.79 in) C/30 anti-aircraft gun. The boat had a complement of between forty-four and sixty. [2]

Service history

The boat's career began with training at 5th U-boat Flotilla on 22 July 1943, followed by active service on 1 February 1944 as part of the 9th Flotilla. On 1 October 1944 she transferred to 33rd Flotilla for the remainder of her service.

In five patrols she sank one merchant ship, for a total of 1,791  gross register tons  (GRT) and damaged one other.

Wolfpacks

U-989 took part in three wolfpacks, namely:

Fate

U-989 was sunk on 14 February 1945 in the North Atlantic in position 61°36′N01°35′W / 61.600°N 1.583°W / 61.600; -1.583 , by depth charges from HMS Bayntun, HMS Braithwaite, HMS Loch Eck and HMS Loch Dunvegan. All hands were lost.

Summary of raiding history

DateShip NameNationalityTonnage
(GRT)
Fate [3]
23 August 1944 Louis Kossuth Flag of the United States (1912-1959).svg  United States 7,176Damaged
26 August 1944 Ashmun J Clough Civil Ensign of the United Kingdom.svg  United Kingdom 1,791Sunk

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References

  1. Helgason, Guðmundur. "The Type VIIC boat U-989". German U-boats of WWII - uboat.net. Retrieved 4 September 2014.
  2. 1 2 3 4 Gröner 1991, pp. 43–46.
  3. Helgason, Guðmundur. "Ships hit by U-989". German U-boats of WWII - uboat.net. Retrieved 4 September 2014.

Bibliography