The Vesihiisi was a Finnish submarine of 490 tons displacement launched in 1930. The Vesihiisi was powered by Atlas diesel engines providing a top speed of 14 knots surfaced, 8 knots submerged and a range of 2400 km surfaced. She carried a complement of 27 and was armed with one 3-inch gun; one machine-gun and four 21-inch torpedo tubes and also ca...