SM UB-9

History
German Empire
Name	UB-9
Ordered	15 October 1914
Builder	AG Weser, Bremen
Yard number	218
Laid down	6 November 1914
Launched	6 February 1915
Commissioned	18 February 1915
Stricken	19 February 1919
Fate	Broken up in 1919
General characteristics
Class and type	German Type UB I submarine
Displacement	127 t (125 long tons) surfaced; 141 t (139 long tons) submerged;
Length	27.88 m (91 ft 6 in) (o/a)
Beam	3.15 m (10 ft 4 in)
Draft	3.03 m (9 ft 11 in)
Propulsion	1 × propeller shaft; 1 × Körting 4-cylinder diesel engine, 59 bhp (44 kW); 1 × Siemens-Schuckert electric motor, 119 shp (89 kW);
Speed	7.45 knots (13.80 km/h; 8.57 mph) surfaced; 6.24 knots (11.56 km/h; 7.18 mph) submerged;
Range	1,500 nmi (2,800 km; 1,700 mi) at 5 knots (9.3 km/h; 5.8 mph) surfaced; 45 nmi (83 km; 52 mi) at 4 knots (7.4 km/h; 4.6 mph);
Test depth	50 metres (160 ft)
Complement	14
Armament	2 × 45 cm (17.7 in) bow torpedo tubes; 2 × torpedoes; 1 × 8 mm (0.31 in) machine gun;
Notes	33-second diving time
Service record
Commanders:	Oblt. Wilhelm Werner; 18–28 February 1915;
Operations:	No patrols
Victories:	None

SM UB-9 was a German Type UB I submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. UB-9 was ordered in October 1914 and was laid down at the AG Weser shipyard in Bremen in November. UB-9 was a little under 28 metres (92 ft) in length and displaced between 127 and 141 tonnes (125 and 139 long tons), depending on whether surfaced or submerged. She carried two torpedoes for her two bow torpedo tubes and was also armed with a deck-mounted machine gun. She was launched and commissioned as SM UB-9 in February 1915.

UB-9's commanding officer at commissioning only remained in charge of the ship for a week. Sources do not report any more commanding officers assigned through the end of the war, so it's not clear if the submarine remained in commission. UB-9 was reported in use as a training vessel at Kiel in September 1915. The U-boat made no war patrols and sank no ships during the war, which may indicate that the vessel remained in a training role. At the end of the war, UB-9 was deemed unseaworthy and unable to surrender at Harwich with the rest of Germany's U-boat fleet. She remained in Germany where she was broken up by Dräger at Lübeck in 1919.

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