Midget Submarines and other Submarine Types of the German Navy - German midget submarines
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A midget submarine is any submarine under tons, typically operated by a crew of one or . Most German midget submarines were developed late in World War II in an attempt to stop the Allied invasion of Europe and used later to disrupt. The Biber (German for "beaver") was a German midget submarine of the Second World War. Armed with two externally mounted centimetre (21 in) torpedoes.