Finnish submarine Vesihiisi

History
Finland
Name	Vesihiisi
Ordered	4 March 1927
Builder	Crichton-Vulcan
Laid down	1927
Launched	1 August 1930
Commissioned	2 December 1931
Decommissioned	1946
Fate	Scrapped 1950s
General characteristics
Class and type	Vetehinen-class submarine
Displacement	493 tonnes surfaced, 716 tonnes submerged
Length	63.5 m (208.3 ft)
Beam	6.2 m (20.3 ft)
Draft	3.6 m (11.8 ft)
Propulsion	Diesel-electric, 1,016 hp (758 kW)
Speed	12.6 knots (23.3 km/h; 14.5 mph) surfaced 8.5 knots (15.7 km/h; 9.8 mph) submerged
Range	1,575 nautical miles (2,917 km; 1,812 mi) at 10 knots (19 km/h; 12 mph) surfaced 75 nautical miles (139 km; 86 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Complement	30 men
Armament	4 × 533 mm (21 in) torpedo tubes, 2 bow, 2 stern (6 torpedoes) 20 mines in vertical shafts 1 × 76 mm/48 Bofors 1 × 20 mm/60 Madsen 1 × 12.7 mm Added in 1942: Depth charge rack (4 depth charges)

Vesihiisi was a Finnish 500-tonne Vetehinen-class submarine that was constructed in the early 1930s. The vessel served in the Finnish Navy during the second World War. The name Vesihiisi refers to a mythological Finnish sea creature similar to a Siren.