SM U-7 (Germany)

History
German Empire
NameU-7
Ordered8 April 1908
BuilderGermaniawerft, Kiel
Cost2,540,000 Goldmark
Yard number149
Laid down6 May 1909
Launched28 July 1910
Commissioned18 July 1911
FateSunk by U-22 in a friendly fire incident, 26 dead.
General characteristics
Class & typeGerman Type U 5 submarine
Displacement
  • 505 t (497 long tons) surfaced
  • 636 t (626 long tons) submerged
Length
Beam
  • 5.60 m (18 ft 4 in) (o/a)
  • 3.75 m (12 ft 4 in) (pressure hull)
Draught3.55 m (11 ft 8 in)
Installed power
  • 2 × Körting 6-cylinder and 2 × Körting 8-cylinder two stroke paraffin motors with 900 PS (660 kW; 890 shp)
  • 2 × SSW electric motors with 1,040 PS (760 kW; 1,030 shp)
  • 550 rpm surfaced
  • 600 rpm submerged
Propulsion
  • 2 shafts
  • 2 × 1.30 m (4 ft 3 in) propellers
Speed
  • 13.4 knots (24.8 km/h; 15.4 mph) surfaced
  • 10.2 knots (18.9 km/h; 11.7 mph) submerged
Range3,300 nmi (6,100 km; 3,800 mi) at 9 knots (17 km/h; 10 mph)
Test depth30 m (98 ft)
Boats & landing
craft carried		1 dingi
Complement4 officers, 24 men
Armament
Service record
Part of:
  • I Flotilla
  • 1 August 1914 – 21 January 1915
Commanders:
  • Kptlt. Georg König
  • 1 August 1914 – 21 January 1915
Operations: 3 patrols
Victories: None

SM U-7 was a Type U 5 U-boat, one of the 329 that served in the Imperial German Navy in World War I. U-7 took part in the First Battle of the Atlantic.

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