Given the question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. German submarine V-80 - The V-80 (German: Versuchs-U-Boot V 80) was a 76-ton experimental submarine and the only representative of the German Type V design produced for Nazi Germany's Kriegsmarine.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.
The answer is:
Mean Of Transportation