''U-18'' may refer to one of the following
German
German(s) may refer to:
* Germany (of or related to)
**Germania (historical use)
* Germans, citizens of Germany, people of German ancestry, or native speakers of the German language
** For citizens of Germany, see also German nationality law
**Ger ...
submarines
A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely o ...
:
* , was a
Type U 17 submarine launched in 1912 and that served in the
First World War until sunk on 23 November 1914
** During the First World War, Germany also had these submarines with similar names:
*** , a
Type UB II submarine
The UB II type submarine was a class of U-boat built during World War I by the German Imperial Navy. They were enlarged from the preceding type UB I and were more effective vessels. The boats were a single hull design with a 50-metre maximum d ...
launched in 1915 and sunk 9 December 1917
*** , a
Type UC II submarine launched in 1916 and sunk 19 February 1917
*** , a
Type UC I submarine; while in Austro-Hungarian service, she was renamed ''U-18''
* , a
Type IIB submarine that served in the
Second World War and was scuttled on 25 August 1944
* , a
Type 206 submarine
The Type 206 is a class of diesel-electric submarines (U-boats) developed by Howaldtswerke-Deutsche Werft (HDW). Its design is based on the preceding Type 205 submarine class. These small and agile submarines were built during the Cold War to op ...
of the
Bundesmarine that was launched in 1973 and sold to Columbia after decommissioning in 2011 for spare parts.
{{DEFAULTSORT:U-0018
Submarines of Germany