SM U-99
| History | |
|---|---|
 German Empire | |
| Name | U-99 |
| Ordered | 15 September 1915 |
| Builder | AG Weser, Bremen |
| Yard number | 250 |
| Laid down | 30 November 1915 |
| Launched | 27 January 1917 |
| Commissioned | 28 March 1917 |
| Fate | Sunk by HMS J2, 7 July 1917 |
| General characteristics [1] | |
| Class and type | German Type U 57 submarine |
| Displacement | |
| Length |
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| Beam |
|
| Height | 8.25 m (27 ft 1 in) |
| Draught | 3.65 m (12 ft) |
| Installed power | |
| Propulsion | 2 shafts, 2 × 1.65 m (5 ft 5 in) propellers |
| Speed |
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| Range |
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| Test depth | 50 m (160 ft) |
| Complement | 4 officers, 32 enlisted |
| Armament |
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| Service record | |
| Part of: |
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| Commanders: |
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| Operations: | 1 patrol |
| Victories: | None |
SM U-99[Note 1] was one of the 329 submarines serving in the Imperial German Navy in World War I.
U-99 was engaged in the naval warfare and took part in the First Battle of the Atlantic.[3]
Design
[edit]U-99 had a displacement of 750 tonnes (740 long tons) when at the surface and 952 tonnes (937 long tons) while submerged.[1] She had a total length of 67.60 m (221 ft 9 in), a pressure hull length of 54.02 m (177 ft 3 in), a beam of 6.32 m (20 ft 9 in), a height of 8.25 m (27 ft 1 in), and a draught of 3.65 m (12 ft 0 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).[1]
The submarine had a maximum surface speed of 16.5 knots (30.6 km/h; 19.0 mph) and a maximum submerged speed of 8.8 knots (16.3 km/h; 10.1 mph).[1] When submerged, she could operate for 45 nautical miles (83 km; 52 mi) at 5 knots (9.3 km/h; 5.8 mph); when surfaced, she could travel 10,100 nautical miles (18,700 km; 11,600 mi) at 8 knots (15 km/h; 9.2 mph). U-99 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-six (thirty-two crew members and four officers).[1]
Operations
[edit]The Royal Navy submarine HMS J2 is credited with sinking U-99 in the Northern North Sea on 7 July 1917, although the attribution is uncertain.
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.
Citations
[edit]- ^ a b c d e Gröner 1991, pp. 12–14.
- ^ Helgason, Guðmundur. "WWI U-boat commanders: Max Eltester". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 16 March 2015.
- ^ Helgason, Guðmundur. "WWI U-boats: U 99". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 16 March 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.
58°0′N 30°5′E / 58.000°N 30.083°E
Shipwrecks and maritime incidents in July 1917 | |
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| Other incidents |
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