|Shipyard||Kaiserliche Werft, Danzig (Werk 3)|
|Ordered||13 Aug 1907||Laid down|
|Launched||18 May 1909||Commissioned||1 Jul 1909|
|1 Aug 1914 - 11 Nov 1918 training Flotilla
|Fate||27 Jan 1919 - Stricken, broken up at the Imperial Navy Dockyard, Kiel. The hull was however sold to Stinnes on 3 Feb 1920. .|
There was another U 4 in World War Two|
That boat was launched from its shipyard on 31 Jul 1935 and commissioned into the Kriegsmarine on 17 Aug 1935. Take a look at the U 4 from WWII.