Project 664-class torpedo boat

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ORP Sprawny in the 1980s
Class overview
Name	Project 664 class torpedo boat
Builders	Stocznia Pólnocna, Gdańsk
Operators	Polish Navy
Built	1961-1972
In commission	1965-1980s
Completed	8
Retired	8
Scrapped	7
Preserved	1
General characteristics
Type	Torpedo boat
Displacement	94 t (93 long tons) standard 128 t (126 long tons) full
Length	24.76 m (81 ft 3 in)
Beam	7.79 m (25 ft 7 in)
Draft	1.61 m (5 ft 3 in)
Propulsion	CODAG 4 × M-50F3 diesel engines, each 1,200 PS (883 kW) 1 × TM-1 gas turbine, 5,132 PS (3,775 kW) sustained power, 7,200 PS (5,296 kW) max power 4 × propeller shafts
Speed	49.28 knots (91.27 km/h; 56.71 mph) maximum 43 kn (80 km/h; 49 mph) max sustained 28 kn (52 km/h; 32 mph) travel
Range	410 nmi (760 km; 470 mi) at 16 kn (30 km/h; 18 mph)
Complement	20 officers and enlisted
Sensors and processing systems	MR-102 surveillance and torpedo fire control radar
Armament	Twin AK-230 gun with Kolonka optical sight, 1000 rounds of ammunition 4 × 533 mm (21 in) torpedo tubes, 4 torpedoes Minelaying capabilities: 2 aft torpedo tubes can be exchanged with ramps for 2 × AMD-1000 or 4 × AMD-500 or 20 × JaM naval mines

The Project 664 (NATO reporting name Wisla) class were Polish torpedo boats, designed in Poland in the 1970s. They were one of the few vessels of this size, powered by a gas turbine, and could achieve a great speed.