Kotlin-class destroyer

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Kotlin-class destroyer Vozbuzhdeny in January 1981
Class overview
Name	Kotlin class
Operators	Soviet Navy  Polish Navy
Preceded by	Neustrashimy class
Succeeded by	Kildin class
Built	1955-1958
In commission	1955-1992
Completed	27
Active	0
Retired	27
General characteristics
Type	Destroyer
Displacement	2,662 tonnes (2,620 long tons; 2,934 short tons) (standard), 3,230 t (3,180 long tons; 3,560 short tons) (full load)
Length	126.1 m (414 ft)
Beam	12.7 m (42 ft)
Draught	4.2 m (14 ft)
Propulsion	2 × shaft geared steam turbines, 4 boilers, 72,000 hp (54 MW)
Speed	38 knots (70 km/h; 44 mph)
Complement	284
Sensors and processing systems	Radar: Fut -N (air search), Ryf (surface) Sonar: Pegas
Armament	(Project 56) 4 × 130 mm (5.1 in) SM-2-1 guns (2×2) 16 × 45 mm (1.8 in) SM-20-ZIF guns (4×4) 10 × 533 mm (20 in) PTA-53-56 torpedo tubes (2×5) 6 × BMB-2 depth charge throwers (later replaced by ASW mortars) 50 × mines (Project 56A) 2 × 130 mm (5.1 in) SM-2-1 gun (1×2) 4 × 45 mm (1.8 in) SM-20-ZIF gun (1×4) 8 × 30 mm (1.2 in) AK-230 guns (4×2) 5 × 533 mm (20 in) TA MPTA-53M torpedo tubes (1×5) 24 × 213 mm (10 in) RBU-6000 ASW rocket launchers (2×12) 1× twin S-125 Neva/Pechora (NATO SA-N-1) SAM (16 missiles) 50 × mines

Kotlin-class destroyers were Cold War era ships built for the Soviet Navy. The Russian name for this class was Project 56 Spokoiny (Спокойный, "tranquil"). 27 ships were built between 1955 and 1958; they were all decommissioned in the late 1980s. The Kildin class is based on the design of the Kotlins. The Chinese Luda class which is based on the Soviet Neustrashimy class, also borrows some design concepts from the Kotlin class.^{[1][clarification needed]}