SM U-4 (Germany)

History
German Empire
Name	U-4
Ordered	13 August 1907
Builder	Kaiserliche Werft Danzig
Cost	1,629,000 Goldmark
Yard number	3
Launched	18 May 1909
Commissioned	1 July 1909
Decommissioned	27 January 1919
Fate	Broken up in 1919
General characteristics
Class & type	Type U 3 submarine
Displacement	421 t (414 long tons) surfaced; 510 t (500 long tons) submerged;
Length	51.28 m (168 ft 3 in) (o/a); 45.00 m (147 ft 8 in) (pressure hull);
Beam	5.60 m (18 ft 4 in)
Draught	3.05 m (10 ft)
Propulsion	2 shafts; 2 × Körting 8-cylinder two stroke paraffin motors with 600 PS (440 kW; 590 shp); 2 × Siemens-Schuckert electric motors with 1,030 PS (760 kW; 1,020 shp); 550 rpm surfaced; 600 rpm submerged;
Speed	11.8 knots (21.9 km/h; 13.6 mph) surfaced; 9.4 knots (17.4 km/h; 10.8 mph) submerged;
Range	1,800 nmi (3,300 km; 2,100 mi) at 12 knots (22 km/h; 14 mph) surfaced; 50 nmi (93 km; 58 mi) at 4.5 knots (8.3 km/h; 5.2 mph) submerged;
Test depth	30 m (98 ft 5 in)
Boats & landing; craft carried	1 dinghy
Complement	3 officers, 19 men
Armament	4 × 45 cm (18 in) torpedo tubes (2 bow, 2 stern); 6 torpedoes; 1 × 5 cm (2.0 in) SK L/40 gun (from 1915);
Service record
Part of	Training Flotilla; 1 August 1914 - 11 November 1918;
Commanders	Friedrich Lützow

SM U-4 was one of 329 submarines which served in the Imperial German Navy during World War I.

The boat was built at Kaiserliche Werft Danzig and commissioned on 1 July 1909. During the war she served as a training boat and did not see active service. After the war U-4 was partially broken up at Kiel in 1919, with her hull being sold on to Hugo Stinnes the following year.