POI's creator (Voyajo Team)
Vesikko was a submarine of the Finnish Navy in World War II. It was designed by Dutch Ingenieurskantoor voor Scheepsbouw den Haag (I.v.S) and built in 1933 by the Crichton-Vulcan shipyard in Turku, Finland. It served as a direct prototype (name CV-707) for German Type II U-boats (...) (from Wikipedia)