German submarine V-80

The V-80 (Versuchs-U-Boot V 80) was a 1939 German Navy 76-ton experimental submarine and the only representative of the German Type V design.

The prototype was completed in 1940 in Germaniawerft in Kiel. The 4 man vessel was designed to test the Walter hydrogen peroxide-based turbine propulsion system. Its range was 50 nautical miles (93 km) at 28 knots (52 km/h).

The only earlier attempt to use a chemical reaction based air-independent propulsion system was in the Spanish submarine the Ictineo II. This midget submarine led to the design of the German Type XVII submarine.