Buyan-class corvette

	; Buyan-class corvette (pr 21630); Buyan-M-class corvette (pr 21631)
Class overview
Name	Buyan class
Builders	Almaz Shipbuilding Company; Zelenodolsk Plant Gorky;
Operators	Russian Navy
Preceded by	Nanuchka class
Succeeded by	Karakurt class
Subclasses	Project 21631 Buyan-M (domestic); Project 21632 Tornado (export);
Built	2004–present
In commission	2006–present
Planned	15
Building	1
Completed	14
Active	14
General characteristics
Type	Guided missile corvette
Displacement	Buyan: 500 tonnes (490 long tons; 550 short tons) (standard); Buyan-M: 949 tonnes (934 long tons; 1,046 short tons) (full);
Length	Buyan: 62 m (203 ft); Buyan-M: 75 m (246 ft);
Beam	Buyan: 9.6 m (31 ft); Buyan-M: 11 m (36 ft);
Height	6.57 m (22 ft)
Draft	Buyan: 2 m (7 ft); Buyan-M: 2.5 m (8 ft);
Propulsion	2 shaft CODAD, 4 x Zvezda M520, 14,584 shp (10,880 kW) and Kolomna Diesel, Pumpjet.
Speed	Buyan: 28 knots (52 km/h; 32 mph); Buyan-M: 26 knots (48 km/h; 30 mph);
Range	Buyan: 1,500 nmi (2,800 km; 1,700 mi); Buyan-M: 2,300 nmi (4,300 km; 2,600 mi) at 12 knots;
Endurance	10 days
Complement	Buyan: 29-36; Buyan-M: 52;
Sensors and ; processing systems	Buyan:; 5P-26M Pozitiv-M phased array radar system (Pozitiv-ME1.2 for export); MR-231 navigation radar; 5P-10-03 Laska fire control system (5P-10-03E for export); МР-123 fire control system; Anapa-M anti-saboteur sonar system (Anapa-ME for export); Buyan-M:; 5P-26M1 Pozitiv-M1 phased array radar system; MP-231-2 navigation radar; 5P-10-03 Laska fire control system; МР-123-02 fire control system; Anapa-M anti-saboteur sonar system;
Electronic warfare ; & decoys	Buyan: 2 × 10 PK-10 decoy launchers; Buyan-M: TK-25 radar jammers;
Armament	Buyan:; 1 × 100 mm A-190-01 naval gun; 2 × 30 mm AK-630 CIWS; 1 × 20 122 mm retractable A-215 "Grad-M"; 1 × 4 3M47 Gibka surface-to-air missiles; 1 × 10 55 mm DP-65 anti-saboteur grenade launcher; 2 × 14.5 mm KPV type; Buyan-M:; 1 × 100 mm A-190-01 naval gun; 1 × 2 30 mm AK-630-M2 CIWS; 1 × Pantsir-M CIWS (Stavropol); 2 × 4 UKSK VLS cells for Kalibr or Oniks anti-ship cruise missiles; 2 × 4 Komar surface-to-air missiles; 1 × 10 55 mm DP-65 anti-saboteur grenade launcher; 2 × 14.5 mm KPV type;

The Buyan class (Russian: Буян, lit. 'Buyan'), Russian designations Project 21630 Buyan and Project 21631 Buyan-M, are series of corvettes (small artillery and missile ships in Russian classification) developed by Zelenodolsk Design Bureau for the Russian Navy. Since 2010, all subsequent vessels are being constructed as improved Project 21631 subclass, incorporating greater tonnage, stealth technology and the 3S14 vertical launching system for either Kalibr or Oniks anti-ship cruise missiles, significantly enhancing combat capabilities. The ships are primarily designed for operations within littoral zones to protect Russia's vast coastal areas. Due to the small tonnage, they can operate even within shallow parts of oceans and seas and Russia's extensive inland waterway system. The export variant is known as Project 21632 Tornado.

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