VS 5 was an experimental semi-submersible torpedo boat (VersuchsSchnellboot) completed in 1941 and based on a 1938 patent by a Berlin dentist. The intended armament included two 21in torpedo tubes and two 2cm cannon. Its fate after 1941 is unknown.
STRANGE VEHICLES OF PRE-WAR GERMANY & THE THIRD REICH (1928-1945)