SM U-85
| History | |
|---|---|
 German Empire | |
| Name | U-85 |
| Ordered | 23 June 1915 |
| Builder | Germaniawerft, Kiel |
| Yard number | 255 |
| Laid down | 29 November 1915 |
| Launched | 22 August 1916 |
| Commissioned | 23 October 1916 |
| Fate | Foundered in North Sea after 7 March 1917, 38 dead (all hands lost).[1] |
| General characteristics [2] | |
| Displacement | |
| Length |
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| Beam |
|
| 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 |
|
| Range |
|
| Test depth | 50 m (160 ft) |
| Complement | 4 officers, 31 enlisted |
| Armament |
|
| Service record | |
| Part of: |
|
| Commanders: |
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| Operations: | 3 patrols |
| Victories: | |
SM U-85[Note 1] was one of the 329 submarines serving in the Imperial German Navy in World War I. U-85 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
[edit]Type U 81 submarines were preceded by the shorter Type UE I submarines. U-85 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-85 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 (from 1917). She had a complement of thirty-five (thirty-one crew members and four officers).[2]
Summary of raiding history
[edit]| Date | Name | Nationality | Tonnage[Note 2] | Fate[4] |
|---|---|---|---|---|
| 26 January 1917 | Dicax |  Norway | 923 | Sunk |
| 6 February 1917 | Cliftonian |  United Kingdom | 4,303 | Sunk |
| 6 February 1917 | Explorer | United Kingdom | 7,608 | Damaged |
| 7 February 1917 | California | United Kingdom | 8,669 | Sunk |
| 7 February 1917 | Vedamore | United Kingdom | 6,330 | Sunk |
References
[edit]Notes
[edit]- ^ "SM" stands for "Seiner Majestät" (English: His Majesty's) and combined with the U for Unterseeboot would be translated as His Majesty's Submarine.
- ^ Tonnages are in gross register tons
Citations
[edit]- ^ a b c d Helgason, Guðmundur. "WWI U-boats: U 85". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net.
- ^ a b c d e Gröner 1991, pp. 12–14.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Willy Petz". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.
- ^ Helgason, Guðmundur. "Ships hit by U 85". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2015.
Bibliography
[edit]- 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.
Shipwrecks and maritime incidents in March 1917 | |
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| Shipwrecks |
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| Other incidents |
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