SM UC-25

History
German Empire
Name:	UC-25
Ordered:	29 August 1915
Builder:	AG Vulcan, Hamburg
Yard number:	64
Launched:	10 June 1916
Commissioned:	28 June 1916
Fate:	scuttled at Pola, October 1918
General characteristics
Class and type:	German Type UC II submarine
Displacement:	400 t (390 long tons), surfaced 480 t (470 long tons), submerged
Length:	49.45 m (162 ft 3 in) o/a 39.30 m (128 ft 11 in) pressure hull
Beam:	5.22 m (17 ft 2 in) o/a 3.65 m (12 ft) pressure hull
Draught:	3.68 m (12 ft 1 in)
Propulsion:	2 × propeller shafts 2 × 6-cylinder, 4-stroke diesel engines, 500 PS (370 kW; 490 bhp) 2 × electric motors, 460 PS (340 kW; 450 shp)
Speed:	11.6 knots (21.5 km/h; 13.3 mph), surfaced 6.6 knots (12.2 km/h; 7.6 mph), submerged
Range:	9,260 nmi (17,150 km; 10,660 mi) at 7 knots (13 km/h; 8.1 mph), surfaced 53 nmi (98 km; 61 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 (3.5 in) Uk L/30 deck gun
Notes:	48-second diving time
Service record
Part of:	Baltic Flotilla 12 September 1916 – 15 April 1917 Pola Flotilla 15 April 1917 – 11 November 1918
Commanders:	Kptlt. Johannes Feldkirchner 28 June 1916 – 17 July 1917 Oblt.z.S. Walter Lippold 18 July – 13 December 1917 Oblt.z.S. Freiherr Ernst von Wangenheim 14 December 1917 – 15 February 1918 Oblt.z.S. Karl Dönitz 16 February – August 1918
Operations:	13 patrols
Victories:	18 merchant ships sunk (17,127 GRT) 5 merchant ships damaged (28,370 GRT) 3 warships sunk (2,201 tons) 2 warships damaged (6,500 tons)

SM UC-25 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 29 August 1915 and was launched on 10 June 1916. She was commissioned into the German Imperial Navy on 28 June 1916 as SM UC-25. In 13 patrols UC-25 was credited with sinking 21 ships, either by torpedo or by mines laid. March–September 1918 she was commanded by Karl Dönitz, later Grand admiral.UC-25 was scuttled at Pola on 28 October 1918 on the surrender of Austria-Hungary.

A German Type UC II submarine, UC-25 had a displacement of 400 tonnes (390 long tons) when at the surface and 480 tonnes (470 long tons) while submerged. She had a length overall of 49.45 m (162 ft 3 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 250 metric horsepower (180 kW; 250 shp) (a total of 500 metric horsepower (370 kW; 490 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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