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Project 21631  
Initial Operational Capability (IOC): January 2014
Total Production: 12
Unitary Cost: USD$70 million
Also Known As: Buyan-M and Grad Sviyazhsk
Origin: Russia
Corporations: Almaz Shipbuilding and Zelenodolsk Design Bureau
Parent System: Project 21630
Initial Operational Capability (IOC): 2008
Total Production: 15
Family Members: Project 21630 and Project 21635
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Description: The Project 21630 Buyan, Project 21632 Tornado export version, is a new generation of river-sea type gunboat designed to protect Russia's 200-mile maritime economic zone and provide naval gunfire support for counterterrorist operations. The ship features stealth technology and is equipped with large- and medium-caliber dual purpose guns. Due to its shallow draft (up to 2 meters), the ship can perform missions in shallow waters, in river mouths, particularly delivering troops directly to the beach. At the same time, its design features enabled safe navigation in stormy conditions (at sea state up to 6) and use of weapons at sea state up to 4. Its water jets ensure speeds of up to 25 knots under any conditions, provide high maneuverability and controllability, reduce noise and running vibration, and are not prone to damage in shallow waters.

The 900-ton class Project 21631 Buyan-M is an stretched version of the 500-ton Buyan class gunboat. The Buyan-M features a larger and more sophisticated weapons payload including state-of-the-art missile systems. The 74-meter long ship is intended to perform anti-surface warfare (ASuW) combat missions with secondary air defense capability thanks to four Igla-1M surface-to-air missiles (SAM). The Buyan-M weapon system consists of a single A-190 100mm cannon, two AK-630M anti-aircraft guns, eight Club-S Kalibr anti-ship missiles, and four Igla-1M SAMs mounted on a 3M47 Gibka launcher. Besides, these vessels are equipped with a variety of 14.5mm (2) and 7.62mm (3) machine guns. The Russian Navy plans to procure three ships to be based in the Caspian Sea beginning in 2012 or 2013. The Russian Navy increased the number of Buyan-M gunboats to nine in late 2013/early 2014 with three boats to be delivered to the Black Sea and Baltic fleets.

Project 21631 Specifications

Crew: 36
Beam: 11 meter (36.1 foot)
Draft: 2.60 meter (8.53 foot)
Length: 74 meter (243 foot)
Main Gun Caliber: 100 millimeter
Ship's Height: 6.57 meter
Max Range: 1,500 nautical mile (2,778 kilometer)
Economical Speed: 12 knot
Top Speed: 25 knot (12.9 mps)
Mission Endurance: 10 day
Full Displacement: 949 ton
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Project 21631 News

There are 8 news between
7 Feb 2012 and 25 Nov 2017
Saturday, November 25, 2017Russian Navy Outlines Capabilities of Cutting-Edge Karakurt Corvettes
Sunday, November 19, 2017Russian Navy Tests Palash and Palma Air Defense Systems in the Caspian Sea
Saturday, June 3, 2017Russian Navy to Get First Karakurt Class Corvette after the Summer
Monday, October 10, 2016Russian Navy Buyan-M Corvette to Be Equipped with Pantsir-M Air Defense System
Sunday, August 7, 2016Russian Navy Orders Five Karakut Class Corvettes for the Black Sea Fleet
Friday, October 23, 2015Russian Navy to Take Delivery of 10th Buyan-M Gunboat by 2019
Wednesday, October 7, 2015Russian Caspian Sea Flotilla Strikes ISIL Targets in Syria with Kalibr Cruise Missiles
Tuesday, February 7, 2012Russian Navy to Receive 40 Conventional and Nuclear Submarines, 14 Frigates, 35 Corvettes, 6 Gunboats and 6 Landing Crafts by 2020

Operators & Related Equipment

20187Baltic (2), Caspian (3) and Black Sea (2)
Dec 20155Caspian Sea fleet (3), Baltic fleet (2)
Sep 20143Caspian Sea fleet (3)
20131Caspian Sea fleet (1)

Grand Total 121
Cannons & Gear
Defensive Weapons
Offensive Weapons
Sensor Systems

Project 21631 Ship Listing

SerialNameStatusLaunch DateCommissionDecommission
652 Grad Sviyazhsk22 Jun 201310 Jan 2014-
653 Uglich22 Aug 2013Jul 2014-
106 Veliky Ustyug-24 Sep 2014-
562 Zelyony Dol-12 Dec 2015-
563 Serpukhov-12 Dec 2015-
609 Vyshny Volochek-2018-
Orekhovo-Zuyevo19 Jun 201810 Dec 2018-

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