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History

German Empire
Name	U-4
Ordered	13 August 1907^[1]
Builder	Kaiserliche Werft Danzig^[1]
Cost	1,629,000 Goldmark
Yard number	3
Launched	18 May 1909^[1]
Commissioned	1 July 1909^[1]
Decommissioned	27 January 1919
Fate	Broken up in 1919
General characteristics ^[2]
Class and type	German 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 dingi
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
Operations:	none
Victories:	No ships sunk or damaged

SM U-4 was one of the 329 submarines serving in the Imperial German Navy in World War I. She was partially broken up in 1919 with her hull being sold on.^[3]

References

^ ^a ^b ^c ^d Rössler 1985, p. 15.
^ Gröner 1991, pp. 4–6.
^ Helgason, Guðmundur. "WWI U-boats: U 4". German and Austrian U-boats of World War I - Kaiserliche Marine - Uboat.net. Retrieved 21 January 2010.

Gröner, Erich; Jung, Dieter; Maass, Martin (1991). U-boats and Mine Warfare Vessels. German Warships 1815–1945. Vol. 2. Translated by Thomas, Keith; Magowan, Rachel. London: Conway Maritime Press. ISBN 0-85177-593-4.
Rössler, Eberhard (1985). Die deutschen U-Boote und ihre Werften: U-Bootbau bis Ende des 1. Weltkriegs, Konstruktionen für das Ausland und die Jahre 1935–1945 [The German Submarines and Their Shipyards: Submarine Construction Until the End of the First World War] (in German). Vol. I. Koblenz: Bernard & Graefe. ISBN 3-7637-5213-7.

v t e German naval ship classes of World War I
Dreadnought battleships	Nassau Helgoland Kaiser König Bayern L 20e α^X
Pre-dreadnought battleships	Brandenburg Kaiser Friedrich III Wittelsbach Braunschweig Deutschland
Battlecruisers	SMS Von der Tann^S Moltke SMS Seydlitz^S Derfflinger Mackensen^X Ersatz Yorck^X
Armored cruisers	SMS Fürst Bismarck^S SMS Prinz Heinrich^S Prinz Adalbert Roon Scharnhorst SMS Blücher^S
Light cruisers	SMS Hela^S Gazelle Bremen Königsberg Dresden Nautilus Kolberg Magdeburg Karlsruhe Graudenz Pillau Wiesbaden Königsberg Brummer Cöln FK proposals^X
Protected cruisers	SMS Kaiserin Augusta^S Victoria Louise
Large torpedo boats	1898 1906 1911 1913 1914 G101^A V105^N 1916 1916M 1917 1918^X
Small / Coastal torpedo boats	S7 A
Aircraft carriers	"I"^X
Coastal defense ships	Siegfried Odin
U-boats	U 1 U 2 U 3 U 5 U 9 U 13 U 16 U 17 U 19 U 23 U 27 U 31 U 43 U 51 U 57 U 63 U 66 U 81 U 87 U 93 U 115^X U 127 U 131^X U 135 U 139 U 142 U 151 UA UB I UB II UB III UC I UC II UC III UD 1^X UE I UE II UF^X UG^X
S Single ship of class X Cancelled V Conversions A Building for Argentina when seized N Building for the Netherlands when seized See also: List of ships of the Imperial German Navy

Hidden categories:

German Type U 3 submarine
U-3 U-4
Preceded by: Type U 2 Followed by: Type U 5 List of U-boats of Germany