Russian Navy commissions Project 21631 Buyan-class M corvette Grayvoron


The Russian Navy (VMF) officially commissioned the newest Project 21631 (Buyan-M-class) guided missile corvette ‘Grayvoron’ on January 30, according to the Ministry of Defense (MoD).
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Russian Vyborg Shipyard laid the Purga ice class coastguard ship of project 23550 925 001Russian Navy Buyan-M class corvette Grayvoron (Picture source Reddit)


The crew of the new ship will start accomplishing its planned combat training tasks in February 2021.

‘Grayvoron’ is the fourth Project 21631 surface combatant assigned to the Russian Navy’s Black Sea Fleet. The formation previously operated three Buyan-M frigates, namely, ‘Vyshny Volochyok’, ‘Orekhovo-Zuyevo’, and ‘Ingushetia’.

‘Grayvoron’ (factory number: 639, pennant number: 600) is the ninth ship in the Buyan-M family of corvettes. The naval platform was laid down in April 2015 at the Zelenodolsk Shipyard named after A M Gorky, and was launched in 2020.

The Russian Navy now operates nine Project 21631 ships, namely, ‘Grad Sviyazhsk’ (factory number: 631, pennant number: 652), ‘Uglich’ (factory number: 632, pennant number: 653), ‘Veliky Ustyug’ (factory number: 633, pennant number: 651), ‘Zeleny Dol’ (factory number: 634, pennant number: 562), ‘Serpukhov’ (factory number: 635, pennant number: 563), ‘Vyshny Volochyok’ (factory number: 636, pennant number: 609), ‘Orekhovo-Zuyevo’ (factory number: 637, pennant number: 626), ‘Ingushetia’ (factory number: 638, pennant number: 630), and ‘Grayvoron’. The Caspian Flotilla operates ‘Grad Sviyazhsk’, ‘Uglich’, and ‘Veliky Ustyug’, while ‘Zeleny Dol’ and ‘Serpukhov’ are issued to the Baltic Fleet.

The Zelenodolsk Shipyard now builds three Buyan-M-class frigates, namely, ‘Grad’ (factory number: 640), ‘Naro-Fominsk’ (factory number: 641), and ‘Stavropol’ (factory number: 642). Those ships are set to be delivered to the Navy before the end of 2023.

In 2019, the head of the Russian Navy’s shipbuilding department Rear Admiral Vladimir Tryapichnikov said the military service was planning that the production of upgraded Project 21631 surface combatants with an increased ammunition payload would start in 2024. The existing Buyan-M class corvettes are fitted with an eight-cell 3S-14 vertical launch system, which fires the Kalibr-family (NATO reporting name: SS-N-27 Sizzler) cruise missiles.

The Grayvoron is a Buyan-M-class guided missile corvette russian designation 21631. Laid down on April 2015. She was launched on April 2020 and commissioned on January 2021. The ship is primarily designed for operations within littoral zones to protect Russia's vast coastal areas.

The Grayvoron Buyan-M-class corvette is powered by CODAD (Combined diesel and diesel) propulsion system that includes four Zvezda M520 developping 14,584 shp (10,880 kW) and Kolomna Diesel, Pumpjet. She can reach a top speed of 26 knots (48 km/h) with a maximum crusing range 2,300 nmi (4,300 km) at 12 knots. She has a length of 75 m, a beam of 11 m and a displacement of 949 tons. The corvette has a crew of 52 sailors and a endurance of 10 days.

The Grayvoron corvette is armed one 100 mm A-190-01 naval gun, two 30 mm AK-630-M2 CIWS (Close-In Weapon System), one Pantsir-M CIWS (Stavropol) air defense missile system, height UKSK VLS (Vertical Launching System) cells for Kalibr or Oniks anti-ship cruise missiles, eight Komar surface-to-air missiles, one DP-65 anti-saboteur grenade launcher and two 14.5 mm KPV type anti-aircraft four-barrel machine guns.


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