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 / 51.883°N 5.733°W. 40 dead (all hands lost).[1] |
General characteristics [2] | |
Displacement | |
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: |
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]
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
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 four 50 centimetres (20 in) torpedo tubes (two 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] |
---|---|---|---|---|
14 December 1916 | Aamot | ![]() |
1,362 | Captured as prize |
18 December 1916 | Malcolm | ![]() |
2,100 | Captured as 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 |
11 January 1918 | Mereddio | ![]() |
3,069 | Sunk |
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
- ^ a b c Helgason, Guðmundur. "WWI U-boats: U 84". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 25 January 2010.
- ^ a b c d e 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. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
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