Vyshny Volochyok, (Project 21631- NATO reporting name: Buyan-M) joins Russia's Black Sea Fleet and goes on mission in Mediterranean Sea. It will leave for a mission in the Mediterranean shortly where it will join the Russian Mediterranean Squadron, the Chief of Staff of the Black Sea Fleet, Rear Admiral Viktor Liin told on Friday. Vyshny Volochyok is only one of the family, assigned to the Black Sea Fleet to date. 

The Project 21631 corvette is armed with the Kalibr (SS-N-27 Sizzler) missile system containing missiles in the 3S14 vertical launcher with eight launch tubes. The Kalibr system attacks seaborne and land-based targets, using the 3M-54 (SS-N-27 Sizzler) and 3M-14 (SS-N-30) cruise missiles, respectively.