SM UC-47

History
German Empire
Class and type:	German Type UC II submarine
Name:	UC-47
Ordered:	20 November 1915
Builder:	AG Weser, Bremen
Yard number:	257
Laid down:	1 February 1916
Launched:	30 August 1916
Commissioned:	13 October 1916
Fate:	rammed by patrol boat off Flamborough Head, 18 November 1917
General characteristics
Class and type:	Type UC II submarine
Displacement:	420 t (410 long tons), surfaced 502 t (494 long tons), submerged
Length:	51.85 m (170 ft 1 in) o/a 39.70 m (130 ft 3 in) pressure hull
Beam:	5.22 m (17 ft 2 in) o/a 3.65 m (12 ft) pressure hull
Draught:	3.67 m (12 ft 0 in)
Propulsion:	2 × propeller shafts 2 × 6-cylinder, 4-stroke diesel engines, 600 PS (440 kW; 590 shp) 2 × electric motors, 460 PS (340 kW; 450 shp)
Speed:	11.7 knots (21.7 km/h; 13.5 mph), surfaced 6.7 knots (12.4 km/h; 7.7 mph), submerged
Range:	7,280 nmi (13,480 km; 8,380 mi) at 7 knots (13 km/h; 8.1 mph) surfaced 54 nmi (100 km; 62 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth:	50 m (160 ft)
Complement:	26
Armament:	6 × 100 cm (39.4 in) mine tubes 18 × UC 200 mines 3 × 50 cm (19.7 in) torpedo tubes (2 bow/external; one stern) 7 × torpedoes 1 × 8.8 cm (3.46 in) Uk L/30 deck gun
Notes:	30-second diving time
Service record
Part of:	Flandern Flotilla 23 January – 18 November 1917
Commanders:	Kptlt. Paul Hundius 13 October 1916 – 8 October 1917 Oblt.z.S. Günther Wigankow 9 October – 18 November 1917
Operations:	13 patrols
Victories:	53 merchant ships sunk (68,375 GRT) 7 merchant ships damaged (14,218 GRT) 3 warships sunk (1,394 tons) 1 warship damaged (224 tons)

SM UC-47 was a German Type UC II minelaying submarine or U-boat in the German Imperial Navy (German: Kaiserliche Marine) during World War I. The U-boat was ordered on 20 November 1915, laid down on 1 February 1916, and was launched on 30 August 1916. She was commissioned into the German Imperial Navy on 13 October 1916 as SM UC-47. In 13 patrols UC-47 was credited with sinking 56 ships, either by torpedo or by mines laid. UC-47 was rammed and depth charged by British patrol boat P-57, under the command of H.C. Birnie, off Flamborough Head on 18 November 1917. UC-47 went down with all hands.

A German Type UC II submarine, UC-47 had a displacement of 420 tonnes (410 long tons) when at the surface and 502 tonnes (494 long tons) while submerged. She had a length overall of 51.85 m (170 ft 1 in), a beam of 5.22 m (17 ft 2 in), and a draught of 3.68 m (12 ft 1 in). The submarine was powered by two six-cylinder four-stroke diesel engines each producing 300 metric horsepower (220 kW; 300 shp) (a total of 600 metric horsepower (440 kW; 590 shp)), two electric motors producing 460 metric horsepower (340 kW; 450 shp), and two propeller shafts. She had a dive time of 48 seconds and was capable of operating at a depth of 50 metres (160 ft).

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