German submarine U-9
U-9 may refer to one of the following German submarines:
- Template:SMU, was the lead ship of the Type U 9 class of submarines; launched in 1910 and served in the First World War until surrendered on 26 November 1918, and famous for the action of 22 September 1914
- During the First World War, Germany also had these submarines with similar names:
- Template:SMU, a Type UB I submarine launched in 1915 and stricken on 19 February 1919
- Template:SMU, a Type UC I submarine launched in 1915 and sunk 20 October 1915
- During the First World War, Germany also had these submarines with similar names:
- Template:GS, a Type IIB submarine that served in the Second World War and sank on 20 August 1944
- Template:GS, a Type 205 submarine of the Bundesmarine that was launched in 1967; decommissioned in 1993; now a museum ship in Speyer, see Technikmuseum Speyer.
U-9 or U-IX may also refer to:
- U-IX, an Austro-Hungarian Navy submarine