German submarine U-25
Type I submarine
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German submarine U-25 was one of two Type IA ocean-going submarines produced by Nazi Germany's Kriegsmarine. Constructed by DeSchiMAG AG Weser in Bremen as yard number 903, U-25 was commissioned on 6 April 1936. It experienced a short, but... Wikipedia
Fate: Sunk by a British mine around 2 August 1940, in the North Sea north of Terschelling