The ships of the Project 12341 are intended for protection of sea communications, protection of escorts, struggle against the surface ships in coastal areas. For struggle against the surface ships there were six Malakhit medium range anti-ship missiles. For distribution targets in to the main missile complex there was a system of passive detection of the surface targets. The ships were armed "Osa" SAM system with ammunition of 20 missiles, 76-mm AK-176 gun and six-guns 30-mm anti-aircraft automatic gun AK-630. The power-plant of the ship consists of three diesel engines the common capacity 30 000 hp which rotate three screws. The maximal speed is 34 knots. Range of navigation with speed of 12 knots makes 3500 nautical miles. Despite of rather small displacement, the ship has high seaworthy qualities and ability to use the weapon at a condition of the sea of 5 points and speeds 24 knots.

The heavily armed guided missile corvette features more gun and zenith defense capabilities compared to previous missile ships. The remarkable amount of fire power and electronics mounted on such a small platform apparently was purchased at the price of poor sea-keeping characteristics. From 1970 to 1991 there were built more then 40 corvettes. Some of them were sold to Algeria, India, Libya, Syria.

Missile Corvette Zyb laid down 28 April 1976 at the Almaz Shipyard, Leningrad (yard No.70), launched 23 October 1978, commissioned 31 December 1978.

From 13 April 1982 - Komsomolets Mordovii, from 15 February 1992 - Shtil.

In February 2020, the missile corvette Shtil was excluded from the lists of the fleet.