History
Nazi Germany
Name: U-984
Ordered: 25 May 1941
Builder: Blohm & Voss, Hamburg
Yard number: 184
Laid down: 7 September 1942
Launched: 12 May 1943
Commissioned: 17 June 1943
Fate: Sunk 20 August 1944 in the North Atlantic in the Bay of Biscay in position 48°16′N 05°33′W / 48.267°N 5.550°W / 48.267; -5.550Coordinates: 48°16′N 05°33′W / 48.267°N 5.550°W / 48.267; -5.550, by HMCS Ottawa, HMCS Kootenay and HMCS Chaudiere.
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
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:
Operations:
  • 1st patrol: 4 January – 24 February 1944
  • 2nd patrol: 22–27 May 1944
  • 3rd patrol: 6–10 June 1944
  • 4th patrol: 12–19 June 1944
  • 5th patrol: 26 July – 20 August 1944
Victories:
  • 3 merchant ships total loss (21,550 GRT)
  • 1 merchant ship damaged (7,240 GRT)
  • 1 warship total loss (1,300 tons)

German submarine U-984 was a Type VIIC U-boat built for Nazi Germany's Kriegsmarine for service during World War II. She was laid down on 7 September 1942 by Blohm & Voss, Hamburg as yard number 184, launched on 12 May 1943 and commissioned on 17 June 1943 under Oberleutnant zur See Heinz Sieder.

Design

German Type VIIC submarines were preceded by the shorter Type VIIB submarines. U-984 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 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-984 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 17 June 1943, followed by active service on 1 August 1944 as part of the 9th Flotilla for the remainder of her service.

On 22 January 1944, Maschinenobergefreiter Hermann Keller was lost overboard in the North Atlantic.

On 8 June 1944, U-984 was bombed by an unidentified Allied aircraft and was sufficiently damaged to force a return to base on 9 June

In 5 patrols she accounted for the total loss of 3 merchant ships, for a total of 21,550 gross register tons (GRT), one warship total loss (1,300 tons) and damaged one other merchant ship.

Wolfpacks

U-984 took part in four wolfpacks, namely

  • Rügen (14–26 January 1944)
  • Stürmer (26 January – 3 February 1944)
  • Igel 1 (3–17 February 1944)
  • Dragoner (22–27 May 1944)

Fate

U-984 was sunk on 20 August 1944 in the North Atlantic in the Bay of Biscay in position 48°16′N 05°33′W / 48.267°N 5.550°W / 48.267; -5.550, by depth charges from Canadian destroyers HMCS Ottawa, HMCS Kootenay and HMCS Chaudiere. All hands were lost.

Summary of raiding history

Date Name Nationality Tonnage[Note 1] Fate[3]
25 June 1944 HMS Goodson  Royal Navy 1,300 Total loss
29 June 1944 Edward M. House  United States 7,240 Damaged
29 June 1944 H.G. Blasdel  United States 7,176 Total loss
29 June 1944 John A. Treutlen  United States 7,198 Total loss
29 June 1944 James A. Farrell  United States 7,176 Total loss

See also

References

Notes

  1. ^ Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.

Citations

  1. ^ Helgason, Guðmundur. "The Type VIIC boat U-984". German U-boats of WWII - uboat.net. Retrieved 14 September 2014.
  2. ^ a b c d Gröner 1991, pp. 43-46.
  3. ^ Helgason, Guðmundur. "Ships hit by U-984". German U-boats of WWII - uboat.net. Retrieved 14 September 2014.

Bibliography

  • 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). IV. Hamburg, Berlin, Bonn: Mittler. ISBN 3-8132-0514-2.
  • Debus, Marc; Nell, Alfred (2017). Das letzte Geleit - vom Vorpostenboot zur U-Boot-Flotte : a autobiography. Translated by Toalster, David. Neu Anspach/Germany: Schreibstark-Verlag. ISBN 978-3946922193.
  • 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.
  • Sharpe, Peter (1998). U-Boat Fact File. Great Britain: Midland Publishing. ISBN 1-85780-072-9.

External links

  • Helgason, Guðmundur. "The Type VIIC boat U-984". German U-boats of WWII - uboat.net. Retrieved 29 December 2014.