Name U-984 Yard number 184 Commissioned 17 June 1943 Launched 12 May 1943 Draft 4.74 m Builder Blohm + Voss | Ordered 25 May 1941 Laid down 7 September 1942 Construction started 7 September 1942 Length 67 m Beam 6.2 m | |
Fate Sunk 20 August 1944 in the North Atlantic in the Bay of Biscay in position , by HMCS Ottawa, HMCS Kootenay and HMCS Chaudiere. Part of 5th U-boat Flotilla, 9th U-boat Flotilla | ||
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.
Contents
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. 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).
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). 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 an anti-aircraft gun. The boat had a complement of between forty-four and sixty.
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
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, by depth charges from Canadian destroyers HMCS Ottawa, HMCS Kootenay and HMCS Chaudiere. All hands were lost.