U-9 ready for patrol.
|Career (German Empire)|
|Ordered:||15 July 1908|
|Builder:||Kaiserliche Werft, Danzig|
|Launched:||22 February 1910|
|Commissioned:||18 April 1910|
|Fate:||Surrendered 26 November 1918. Broken up at Morecambe in 1919.|
|Class & type:||German Type U 9 submarine|
493 metric tons (543 short tons) ↑|
611 metric tons (674 short tons) ↓
|Length:||57.3 m (188.0 ft) (OA)|
|Beam:||6 m (19.7 ft)|
|Draught:||3.55 m (11.6 ft)|
2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with 900 PS (890 hp)
2 × SSW electric motors with 1,040 PS (1,030 hp)
550 rpm ↑
600 rpm ↓
14.2 kn (26.3 km/h) ↑|
8.1 kn (15.0 km/h) ↓
|Range:||6,216 km (3,356 nmi) @ 14 kn (26 km/h; 16 mph)|
|Boats & landing |
|Complement:||4 officers, 25 men|
4 x 45 cm (17.7 in) torpedo tubes (2 each bow and stern) with 6 torpedoes|
1x 5 cm (2.0 in) SK L/40 gun
1 x 3.7 cm (1.5 in) Hotchkiss gun
Imperial German Navy:|
13 ships sunk for a total of 8,636 GRT|
5 warships sunk for a total of 44173 tons
SM U-9 was a German Type U 9 U-boat. She was one of 329 submarines serving in the Imperial German Navy, and engaged in the commerce war (Handelskrieg) during World War I. Her construction was ordered on 15 July 1908 and her keel was laid down by Kaiserliche Werft in Danzig. She was launched on 22 February 1910 and commissioned on 18 April 1910.
On 16 July 1914 the crew of U-9 reloaded her torpedo tubes while submerged, the first time any submarine had succeeded in doing so. On 1 August 1914, Kapitänleutnant Otto Weddigen took command. On 22 September, while patrolling the Broad Fourteens, a region of the southern North Sea, U-9 found a squadron of three obsolescent British Cressy-class armoured cruisers (HMS Aboukir, HMS Hogue, and HMS Cressy), (sardonically nicknamed the "Live Bait Squadron") which had been assigned to prevent German surface vessels from entering the eastern end of the English Channel. She fired all six of her torpedoes, reloading while submerged, and sank all three in less than an hour. 1,459 British sailors died. It was one of the most notable submarine actions of all time. Members of the Admiralty who had considered submarines mere toys no longer expressed that opinion after this event.
On 15 October, U-9 sank the protected cruiser HMS Hawke. On 12 January 1915, Johannes Spieß relieved Weddigen, and commanded U-9 until 19 April 1916. During this period, she sank 13 ships totalling 8,635 GRT: 10 small fishing vessels and three British steamers (Don, Queen Wilhelmina and Serbino).
After April 1916, she was withdrawn from front-line duties to be used for training.
- Spindler, Arno (1932,1933,1934,1941/1964,1966). Der Handelskrieg mit U-Booten. 5 Vols. Berlin: Mittler & Sohn. Vols. 4+5, dealing with 1917+18, are very hard to find: Guildhall Library, London, has them all, also Vol. 1-3 in an English translation: The submarine war against commerce.
- Beesly, Patrick (1982). Room 40: British Naval Intelligence 1914-1918. London: H Hamilton. ISBN 978-0-241-10864-2.
- Fitzsimons, Bernard, ed. The Illustrated Encyclopedia of 20th Century Weapons and Warfare, "U-Boats (1905–18), Volume 23, p. 2534. London: Phoebus Publishing, 1978.
- Halpern, Paul G. (1995). A Naval History of World War I. New York: Routledge. ISBN 978-1-85728-498-0.
- Roessler, Eberhard (1997). Die Unterseeboote der Kaiserlichen Marine. Bonn: Bernard & Graefe. ISBN 978-3-7637-5963-7.
- Schroeder, Joachim (2002). Die U-Boote des Kaisers. Bonn: Bernard & Graefe. ISBN 978-3-7637-6235-4.
- Koerver, Hans Joachim (2008). Room 40: German Naval Warfare 1914-1918. Vol I., The Fleet in Action. Steinbach: LIS Reinisch. ISBN 978-3-902433-76-3.
- Koerver, Hans Joachim (2009). Room 40: German Naval Warfare 1914-1918. Vol II., The Fleet in Being. Steinbach: LIS Reinisch. ISBN 978-3-902433-77-0.
- Photos of cruises of German submarine U-54 in 1916-1918.
- A 44 min. German film from 1917 about a cruise of the German submarine U-35.
- Uboat.net: More detailed information about U-9.
- Room 40: original documents, photos and maps about World War I German submarine warfare and British Room 40 Intelligence from The National Archives, Kew, Richmond, UK.
- "WWI U-boats - U 9". U-boat.net. http://www.uboat.net/wwi/boats/index.html?boat=9. Retrieved 2007-05-27.
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