SM U-84
SM U-84 was one of the 329 submarines serving in the Imperial German Navy (Kaiserliche Marine) in World War I. U-84 was engaged in the naval warfare and took part in the First Battle of the Atlantic.[1]
History | |
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Name: | U-84 |
Ordered: | 23 June 1915 |
Builder: | Germaniawerft, Kiel |
Yard number: | 254 |
Laid down: | 25 October 1915 |
Launched: | 22 July 1916 |
Commissioned: | 7 October 1916 |
Fate: | 26 January 1918 - Possibly rammed and depth charged by PC62 in St George's Channel and sunk at 51°53′N 5°44′W. 40 dead (all hands lost).[1] |
General characteristics [2] | |
Displacement: |
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Length: |
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Beam: |
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Height: | 8.00 m (26 ft 3 in) |
Draught: | 4.02 m (13 ft 2 in) |
Installed power: | |
Propulsion: | 2 shafts, 2 × 1.70 m (5 ft 7 in) propellers |
Speed: |
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Range: |
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Test depth: | 50 m (160 ft) |
Complement: | 4 officers, 31 enlisted |
Armament: |
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Service record | |
Part of: |
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Commanders: |
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Operations: | 8 patrols |
Victories: |
Initially U-81 to U-83 had one 10.5 cm gun with 140-240 rounds. U-84 - U-86 on the other hand had two 8.8 cm guns. In 1917 U-84 - U-86 were refitted with a single 10.5 cm gun (240 rounds)[1]
Design
German Type U 81 submarines were preceded by the shorter Type UE I submarines. U-84 had a displacement of 808 tonnes (795 long tons) when at the surface and 946 tonnes (931 long tons) while submerged.[2] She had a total length of 70.06 m (229 ft 10 in), a pressure hull length of 55.55 m (182 ft 3 in), a beam of 6.30 m (20 ft 8 in), a height of 8 m (26 ft 3 in), and a draught of 4.02 m (13 ft 2 in). The submarine was powered by two 2,400 metric horsepower (1,800 kW; 2,400 shp) engines for use while surfaced, and two 1,200 metric horsepower (880 kW; 1,200 shp) engines for use while submerged. She had two propeller shafts. She was capable of operating at depths of up to 50 metres (160 ft).[2]
The submarine had a maximum surface speed of 16.8 knots (31.1 km/h; 19.3 mph) and a maximum submerged speed of 9.1 knots (16.9 km/h; 10.5 mph).[2] When submerged, she could operate for 56 nautical miles (104 km; 64 mi) at 5 knots (9.3 km/h; 5.8 mph); when surfaced, she could travel 11,220 nautical miles (20,780 km; 12,910 mi) at 8 knots (15 km/h; 9.2 mph). U-84 was fitted with six 50 centimetres (20 in) torpedo tubes (four at the bow and two at the stern), twelve to sixteen torpedoes, and one 10.5 cm (4.1 in) SK L/45 deck gun. She had a complement of thirty-five (thirty-one crew members and four officers).[2]
Summary of raiding history
Date | Name | Nationality | Tonnage[Note 1] | Fate[4] |
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14 December 1916 | Aamot | 1,362 | Captured as a prize | |
18 December 1916 | Malcolm | 2,100 | Captured as a prize | |
9 January 1917 | Alexandrian | 4,467 | Damaged | |
10 January 1917 | Bergenhus | 3,606 | Sunk | |
12 January 1917 | Auchencrag | 3,916 | Sunk | |
15 January 1917 | Kinpurney | 1,944 | Sunk | |
15 January 1917 | Omsk | 1,574 | Sunk | |
20 January 1917 | Bulgarian | 2,515 | Sunk | |
20 January 1917 | Neuquen | 3,583 | Sunk | |
17 February 1917 | Bayonne | 2,589 | Sunk | |
17 February 1917 | Romsdalen | 2,548 | Sunk | |
18 February 1917 | Berrima | 11,137 | Damaged | |
18 February 1917 | Hunsworth | 2,991 | Damaged | |
18 February 1917 | Juno | 2,416 | Sunk | |
18 February 1917 | Valdes | 2,233 | Sunk | |
21 February 1917 | Dukat | 1,408 | Sunk | |
22 February 1917 | Invercauld | 1,416 | Sunk | |
13 April 1917 | Argyll | 3,547 | Sunk | |
13 April 1917 | Lime Branch | 5,379 | Damaged | |
18 April 1917 | Cragoswald | 3,235 | Sunk | |
18 April 1917 | Rowena | 3,017 | Sunk | |
19 April 1917 | Elswick Manor | 3,943 | Sunk | |
20 April 1917 | Malakand | 7,653 | Sunk | |
1 July 1917 | Bachi | 2,184 | Sunk | |
1 July 1917 | Demerara | 11,484 | Damaged | |
4 July 1917 | Goathland | 3,044 | Sunk | |
7 July 1917 | Condesa | 8,557 | Sunk | |
7 July 1917 | Oxø | 831 | Sunk | |
12 August 1917 | Ursus Minor | 623 | Sunk | |
13 August 1917 | HMS Bergamot | 1,290 | Sunk | |
24 November 1917 | Actaeon | 4,999 | Sunk | |
1 December 1917 | Antonios Stathatos | 2,743 | Sunk | |
2 December 1917 | Birchgrove | 2,821 | Sunk | |
9 January 1918 | Bayvoe | 2,979 | Sunk | |
10 January 1918 | Cardiff | 2,808 | Damaged | |
12 January 1918 | Chateau Laffite | 1,913 | Sunk | |
17 January 1918 | Messidor | 3,883 | Damaged |
References
Notes
- Merchant ship tonnages are in gross register tons. Military vessels are listed by tons displacement.
Citations
- Helgason, Guðmundur. "WWI U-boats: U 84". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
- Gröner 1991, pp. 12–14.
- Helgason, Guðmundur. "WWI U-boat commanders: Walter Roehr (Royal House Order of Hohenzollern)". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 January 2015.
- Helgason, Guðmundur. "Ships hit by U 84". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 20 January 2015.
Bibliography
- 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.