SM U-7 (Germany)

History
German Empire
Name:	U-7
Ordered:	8 April 1908
Builder:	Germaniawerft, Kiel
Cost:	2,540,000 Goldmark
Yard number:	149
Laid down:	6 May 1909
Launched:	28 July 1910
Commissioned:	18 July 1911
Fate:	Sunk by U-22 in a friendly fire incident, 26 dead.
General characteristics
Class and type:	German Type U 5 submarine
Displacement:	505 t (497 long tons) surfaced 636 t (626 long tons) submerged
Length:	57.30 m (188 ft) (o/a) 43.10 m (141 ft 5 in) (pressure hull)
Beam:	5.60 m (18 ft 4 in) (o/a) 3.75 m (12 ft 4 in) (pressure hull)
Draught:	3.55 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
Range:	3,300 nmi (6,100 km; 3,800 mi) at 9 knots (17 km/h; 10 mph)
Test depth:	30 m (98 ft)
Boats & landing craft carried:	1 dingi
Complement:	4 officers, 24 men
Armament:	4 × torpedo tubes (2 each bow and stern) 6 45 cm (17.7 in) torpedoes 1 × 3.7 cm (1.5 in) Hotchkiss gun
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 was engaged in the naval warfare and took part in the First Battle of the Atlantic.

On 21 January 1915, U-7 was torpedoed and sunk by SM U-22, which had mistaken her for an enemy submarine. Twenty-four crew were killed, and only one survived.

Coordinates: 53°25′48″N 6°02′00″E / 53.43000°N 6.03333°E / 53.43000; 6.03333

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