'''' (Sea Devil'', also known as the (Elephant)) was a two-man amphibious midget submarine, developed by Nazi Germany during World War II. Only one prototype was built in 1944, although its testing was relatively successful and negotiations began for another series of three to test the necessary changes before beginning series production in 1945. These plans were cancelled at the beginning of that year when the decision was made to concentrate production on designs already being built.
'''' (Sea Devil, also known as the (Elephant)) was a two-man amphibious midget submarine, developed by Nazi Germany during World War II. Only one prototype was built in 1944, although its testing was relatively successful and negotiations began for another series of three to test the necessary changes before beginning series production in 1945. These plans were cancelled at the beginning of that year when the decision was made to concentrate production on designs already being built.
==Background and description== The Neger and Marder human torpedoes and the Biber midget submarines were difficult to launch from anywhere other than a harbor. The special preparations required to do so limited their operational flexibility and required additional time and resources. Alois Lödige and several of his colleagues of the Kiel-Eckernförde torpedo testing center developed the concept of putting tracks on a midget submarine to allow it to move on and off a beach under its own power. They designed and built a proof-of-concept vehicle in early 1944 that was tested in March. The one-man (special vessel) was long and displaced without armament. It mounted a pair of torpedoes low on the hull by the tracks.
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