SM UB-47

History
German Empire
Name:	UB-47
Ordered:	31 July 1915
Builder:	AG Weser, Bremen
Yard number:	249
Laid down:	4 September 1915
Launched:	17 June 1916
Commissioned:	4 July 1916
Decommissioned:	21 July 1917
Fate:	Sold to Austria-Hungary
Service record as UB-47
Part of:	German Imperial Navy Pola Flotilla 4 July 1916 - 21 July 1917
Commanders:	Oblt.z.S. Wolfgang Steinbauer 4 July 1916 – 31 March 1917 Oblt.z.S. Hans Hermann Wendlandt 1 April – 21 July 1917
Operations:	7 patrols
Victories:	20 merchant ships sunk (76,195 GRT) 3 merchant ships damaged (16,967 GRT) 2 warships sunk (11,450 t)
Austria-Hungary
Name:	SM U-47
Acquired:	21 July 1917
Commissioned:	30 July 1917
Fate:	ceded to France as war reparation, 1920; scrapped
Service record as U-47
Commanders:	Otto Molitor (July 1917 – March 1918) Freiherr Hugo von Seyffertitz (April – October 1918)
Victories:	2 ships (6,467 GRT) sunk 1 warship (351 t) sunk
General characteristics
Class and type:	as built: German Type UB II submarine after July 1917: U-43-class submarine
Displacement:	272 t (268 long tons) surfaced 305 t (300 long tons), submerged
Length:	36.90 m (121 ft 1 in) o/a 27.90 m (91 ft 6 in) pressure hull
Beam:	4.37 m (14 ft 4 in) o/a 3.85 m (12 ft 8 in) pressure hull
Draught:	3.68 m (12 ft 1 in)
Propulsion:	1 × propeller shaft 2 × 4-stroke 6-cylinder diesel engine, 284 PS (209 kW; 280 bhp) 2 × electric motor, 280 PS (210 kW; 280 shp)
Speed:	8.82 knots (16.33 km/h; 10.15 mph) surfaced 6.22 knots (11.52 km/h; 7.16 mph) submerged
Range:	6,940 nmi (12,850 km; 7,990 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:	22
Armament:	2 × 50 cm (19.7 in) bow torpedo tubes 4 torpedoes 1 × 8.8 cm (3.5 in) deck gun

SM UB-47 was a Type UB II submarine or U-boat for the German Imperial Navy (German: Kaiserliche Marine) during World War I. UB-47 was sold to the Austro-Hungarian Navy (German: Kaiserliche und Königliche Kriegsmarine or K.u.K. Kriegsmarine) during the war. In Austro-Hungarian service the B was dropped from her name and she was known as SM U-47 or U-XLVII as a member of the Austro-Hungarian U-43 class.

UB-47 was ordered in July 1915 and was laid down at the AG Weser shipyard in Bremen in September. UB-47 was a little more than 121 feet (37 m) in length and displaced between 270 and 305 tonnes (266 and 300 long tons), depending on whether surfaced or submerged. She was equipped to carry a complement of four torpedoes for her two bow torpedo tubes and had an 8.8-centimeter (3.5 in) deck gun. As part of a group of six submarines selected for Mediterranean service, UB-47 was broken into railcar sized components and shipped to Pola where she was assembled and launched in June 1916, and commissioned in July. Over the next year the U-boat sank twenty ships, which included the French battleship Gaulois and two Cunard Line steamers in use as troopships, Franconia and Ivernia.

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