SM UB-15

SM U-11
History
German Empire
Name:	UB-15
Ordered:	15 October 1914
Builder:	AG Weser, Bremen
Yard number:	224
Laid down:	9 November 1914
Commissioned:	11 April 1915
Fate:	Transferred to Austria-Hungary, 14 June 1915
Service record as UB-15
Commanders:	Heino von Heimburg (4–17 June 1915)
Victories:	1 warship (245 GRT) sunk
Austria-Hungary
Name:	SM U-11
Acquired:	14 June 1915
Commissioned:	18 June 1915
Fate:	War reparation to Italy; scrapped at Pola, 1920
Service record as U-11
Commanders:	Lüdwig Eberhardt (June–August 1915) Karl Edler von Unczowski (September–October 1915) Robert Teufl von Fernland (October 1915–August 1916) Johann Krsnjavi (August 1916–May 1917) Ludwig Müller (May–July 1917) Wladimir Pfeifer (July–September 1917) Eugen Hornyák Edler von Horn (September 1917–January 1918) Hugo Pistel (January–June 1918) Alfons Graf Montecuccoli (June–August 1918) Alois Sernetz (August–October 1918)
Victories:	None
General characteristics
Class and type:	German Type UB I submarine
Type:	U-10-class submarine
Displacement:	127 tonnes (125 long tons) surfaced 141 tonnes (139 long tons) submerged
Length:	27.88 m (91 ft 6 in) (o/a) 23.62 m (77 ft 6 in) pressure hull
Beam:	3.15 m (10 ft 4 in)
Draught:	3.03 m (9 ft 11 in)
Propulsion:	1 × shaft 1 × Körting diesel engine, 60 bhp (45 kW) 1 × electric motor, 120 shp (89 kW)
Speed:	6.5 knots (12.0 km/h; 7.5 mph) surfaced 5.5 knots (10.2 km/h; 6.3 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) submerged
Complement:	17
Armament:	2 × 45 cm (17.7 in) torpedo tubes (both in front) 2 torpedoes 1 × 66 mm (2.6 in)/18 (October 1916)

SM U-11 or U-XI was a U-10-class submarine in the Austro-Hungarian Navy (error: {{lang-xx}}: text has italic markup (help)) during World War I. She was originally a German Type UB I submarine commissioned into the German Imperial Navy (German: Kaiserliche Marine) as SM UB-15.

SM UB-15 was constructed in Germany and shipped by rail to Pola, where she was assembled and launched. She was commissioned into the German Imperial Navy in April and sank an Italian submarine in June. The boat was handed over to Austria-Hungary and commissioned as SM U-11 on 14 June. In early 1916, U-11 fired on a British submarine, but missed. After the end of the war, U-11 was handed over to Italy as a war reparation and scrapped at Pola by 1920.

U-11 was a small coastal submarine that displaced 127 tonnes (125 long tons) surfaced and 141 tonnes (139 long tons) submerged. She featured a single shaft, a single 60 bhp (45 kW) Körting diesel engine for surface running, and a single 120 shp (89 kW) electric motor for submerged travel.U-11 was capable of up to 6.5 knots (12.0 km/h; 7.5 mph) while surfaced and 5.5 knots (10.2 km/h; 6.3 mph) while submerged at a diving depth of up to 50 metres (160 ft). She was designed for a crew of 17 officers and men.

U-11 was equipped with two 45 cm (17.7 in) torpedo tubes located in the front and carried a complement of two torpedoes. German Type UB I submarines were additionally equipped with a 8 mm (0.31 in) machine gun, but it is not clear from sources if U-11 – a former German boat – was fitted with one, or if it was, retained it in Austro-Hungarian service. In October 1916, U-11's armament was supplemented with a 66 mm (2.6 in)/18 (2.6 in) gun.

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