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SM U-9 was a Germanmarker Type U 9 U-boat built for the Kaiserliche Marine. Her construction was ordered on 15 July 1908 and her keel was laid down by Kaiserliche Werft in Danzigmarker. 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 Fourteensmarker, a region of the southern North Seamarker, U-9 found a squadron of three obsolescent British Cressy-class armoured cruisers, sardonically nicknamed the Live Bait Squadron, which were assigned to prevent German surface vessels from entering the Eastern end of the English Channelmarker. She fired all six of her torpedoes, reloading while submerged, and in less than an hour sank the three cruisers, HMS Aboukir, HMS Hogue, and HMS Cressy. 1459 British sailors died. It was one of most notable submarine actions. Members of the Admiralty who had considered submarines to be mere toys no longer expressed that opinion after this event. On 15 October she sunk 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 tons: 10 small fishing vessels and three British steamers (Don, Queen Wilhelmina and Serbino).

After April 1916, she was withdrawn from front-line duties and used for training.

Besides the raider SMS Emden , the U-9 is the only ship on which Kaiser Wilhem II ever awarded an Iron Cross.

Operations known to British Intelligence

SM U-9 Kaptlt. Weddigen, went later to U-29. Completed at Danzig in April 1914, she joined the 1st Half Flotilla at the outbreak of war.

August 1914. Scouting in Bight.

? 20th September - 23rd September 1914. Cruise to Dutch coast. Sank CRESSY, HOGUE, and ABOUKIR 22nd September.

? 13th October 1914 - ? Cruise in North Sea, sank HAWKE.

? 20th November - 26th November 1914. Cruise to Skudesnaes, east coasts of Shetlands and Orkneys, and Cromarty Firth, with U-8.

January 1915 and February 1915. Scouting in Bight.

25th February - 1st March 1915. Cruise to northern part of North Sea.

2nd May - 10th May 1915. Various vessels sunk of east coast of England.

In Baltic August 1915 to March 1916. On a cruise in Baltic in August 1915 sank British steamer without warning, and also a Russian auxiliary North of Libau.

Arrived Wilhelmshaven, April 1916.

Kiel School, August 1916. From this date U-9 was employed as an instructional boat in the Submarine School.

Surrendered at Harwich 27th November 1918.

See also


Victories of U-9
  1. National Archives, Kew: HW 7/3, Room 40, History of German Naval Warfare 1914-1918

External links

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