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German and Austrian U-boats of World War I - Kaiserliche Marine. "WWI U-boat commanders: Otto Weddigen (Pour le Mérite)". The return of U-9 to Wilhelmshaven, Germany illustration by Willy Stöwer Summary of raiding history Date Propaganda postcard depicting victories of U-9. U-9 and the raider SMS Emden were the only ships which Kaiser Wilhelm II awarded the Iron Cross. During this period, she sank 13 ships totalling 8,635 GRT: 10 small fishing vessels and three British steamers ( Don, Queen Wilhelmina and Serbino).Īfter April 1916, she was withdrawn from front-line duties to be used for training. On 12 January 1915, Johannes Spieß relieved Weddigen, and commanded U-9 until 19 April 1916. On 15 October, U-9 sank the protected cruiser HMS Hawke. Illustration by Hans Bohrdt depicting the sinking of HMS Cressy, HMS Hogue and HMS Aboukir by U-9 on 22 September 1914 off the Dutch coast. Members of the Admiralty who had considered submarines mere toys no longer expressed that opinion after this event. It was one of the most notable submarine actions of all time. She fired four of her torpedoes, reloading while submerged, and sank all three in less than an hour. On 22 September, while patrolling the Broad Fourteens, a region of the southern North Sea, U-9 found a squadron of three obsolete 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. On 1 August 1914, Kapitänleutnant Otto Weddigen took command. 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. See also: Action of 22 September 1914 Action of 22 September 1914 The boat's complement was 4 officers and 31 enlisted. When U-9 underwent a major refit in 1916, two mine-laying rails were added, which were later removed again. In 1915, an additional 5 cm (2.0 in) gun was fitted. Originally, the boat was equipped with a machine gun, which was augmented with a 3.7 cm (1.5 in) Hotchkiss gun when war broke out in 1914. The U-boat was armed with four 50 cm (20 in) torpedo tubes, two fitted in the bow and two in the stern, and carried 6 torpedoes. These engines powered two shafts, each with a 1.45 m (4.8 ft) propeller, which gave the boat a top surface speed of 14.2 knots (26.3 km/h 16.3 mph), and 8.1 knots (15.0 km/h 9.3 mph) when submerged.
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U-9 was fitted with two Körting 8-cylinder plus two Körting 6-cylinder two-stroke petrol engines with a total of 1,000 metric horsepower (735 kW 986 bhp) for use on the surface and two Siemens-Schuckert double-acting electric motors plus two electric motors with a total of 1,160 PS (853 kW 1,144 shp) for underwater use. The boat displaced 493 t (485 long tons) when surfaced and 611 t (601 long tons) when submerged. She had a draught of 3.13 m (10 ft 3 in) with a total height of 7.05 m (23 ft 2 in). The boat's beam was 6 m (19 ft 8 in) (o/a), while the pressure hull measured 3.65 m (12 ft 0 in). U-9 had an overall length of 57.38 m (188 ft 3 in), her pressure hull was 48 m (157 ft 6 in) long. She was launched on 22 February 1910 and commissioned on 18 April 1910. Her construction was ordered on 15 July 1908 and her keel was laid down by Kaiserliche Werft in Danzig. She was one of 329 submarines serving in the Imperial German Navy, and engaged in commerce raiding ( Handelskrieg) during World War I. four 45 cm (17.7 in) torpedo tubes (2 each bow and stern).2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with a total of 1,000 PS (740 kW 990 shp).
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