SM U-25

History
German Empire
NameU-25
Ordered18 March 1911
BuilderGermaniawerft, Kiel
Yard number179
Laid down7 May 1912
Launched12 July 1913
Commissioned9 May 1914
Fate23 February 1919 - Surrendered to France. Broken up at Cherburg in 1921-2.
General characteristics Ocean-going diesel submarine
Class & typeGerman Type U 23 submarine
Displacement
  • 669 t (658 long tons) surfaced
  • 864 t (850 long tons) submerged
Length64.70 m (212.3 ft)
Beam6.32 m (20 ft 9 in)
Draught3.45 m (11 ft 4 in)
Propulsion
  • 2 shafts
  • 2 × Germania 6-cylinder two stroke diesel motors with 1,800 PS (1,320 kW; 1,780 shp)
  • 2 × SSW double Motordynamos with 1,200 PS (880 kW; 1,180 shp)
  • 450rpm surfaced
  • 330 rpm submerged
Speed
  • 16.7 knots (30.9 km/h; 19.2 mph) surfaced
  • 10.3 knots (19.1 km/h; 11.9 mph) submerged
Range
  • 7,620 nmi (14,110 km; 8,770 mi) at 8 knots (15 km/h; 9.2 mph) surfaced
  • 85 nmi (157 km; 98 mi) at 5 knots (9.3 km/h; 5.8 mph) submerged
Test depthabout 50 m (160 ft)
Boats & landing
craft carried		1 dingi
Complement4 officers, 31 men
Armament
Service record
Part of:
  • IV Flotilla
  • 1 August 1914 – Unknown end
  • Training Flotilla
  • Unknown start – 11 November 1918
Commanders:
  • Kptlt. Otto Wünsche
  • 9 May 1914 – 15 September 1915
  • Kptlt. Alfred Saalwächter unknown
  • Kptlt. Emil Heusinger von Waldegg
  • 23 October - 29 December 1917
Operations: 3 patrols
Victories:
  • 21 merchant ships sunk
    (14,145 GRT)
  • 1 merchant ships damaged
    (163 GRT)

SM U-25 was one of the 329 submarines serving in the Imperial German Navy in World War I.

U-25 was engaged in the naval warfare and took part in the First Battle of the Atlantic.

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