Tuima OSA-II class Missile Boat Finnish Navy Suomen Merivoimat

Finnish Navy - Suomen Merivoimat
Tuima (OSA II) class Missile Boat

tuima osa-ii class missile boat finnish navy suomen merivoimat 02x

05/24

Ships:

Unit	Commissioned	STATUS
11 FNS Tuima	1974	decommissioned in 2000 / sold to Egypt
12 FNS Tuuli	1974	decommissioned in 2000 / sold to Egypt
14 FNS Tuisku	1975	decommissioned in 2000 / sold to Egypt
15 FNS Tyskry	1975	decommissioned in 2000 / sold to Egypt

Specifications:

Builder: ? built in Soviet Union

Displacement: 250 tons
Length: 38.6 meters (126 feet 8 in)
Beam: 7.7 m (25 ft 3 in)
Draft: 3.1 m (10 ft 2 in)
Speed: 40 knots (74 km/h)
Range: ?
Complement: 25

Propulsion:
3 x M504 B2 diesel engines (10500 kW / 14100 hp, total)
3 shafts / 3 propellers

Armament (as built):

2 x AK-230 double-barreled 30mm/L65 guns

4 x SS-N-2A Styx anti-ship missiles (SSM)

Systems:
?

Aviation:
none

The vessels were constructed in the Soviet Union and purchased by the Finnish Navy between 1974 and 1975. The vessels were similar to the Soviet Project 205U Tsunami-class missile boats, given the NATO reporting name Osa II.

All of the vessels were later modified into fast minelayers at Aker Finnyards when their armament became obsolete. The modification work took place between 1993 and 1994 at the Uusikaupunki yards. Tuima and Tuuli had their missiles removed and the superstructure was modified. Mine rails and mine loading equipment were installed and the weapons guidance systems were modernized. Tuisku and Tyrsky were also modernized into fast minelayers, but less extensively, removing their missile weapons, and installing mine rails. The Tuima-class vessels belonged to the 5th Minewarfare Squadron based at Upinniemi.

The vessels of the class were decommissioned by 2000.

The Tuima class had three 56-cylinder radial diesel engines, each one producing 3,500 kilowatts (4,700 hp). The middle engine and propeller shaft of Tuima and Tuuli were removed during the modernization to make space for the mine laying equipment. This lowered the top-speed by 7 knots (13 km/h; 8.1 mph). The class was known amongst the Finnish Navy conscripts as "Tuska" (Agony) class or "Moskvich" after a Russian car brand of that name. They were not considered as pleasant places to serve because of their poor ergonomics.

After decommissioning, the vessels were moored at Loviisa, and it was planned that one was to be transferred to the new Maritime Museum in Kotka. However, in October 2006, the Finnish Ministry of Defence stated that all four were to be sold to Egypt where they were refitted and taken into active service.

source: wikipedia

images

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