Mission 

The Project 11541 Korsar escort ship is designed to search for, to track and to engage surface, underwater and air targets, as well as to perform escort and patrol tasks. The ship can carry out a wide range of missions, operating autonomously and within a tactical task force in sea and oceanic areas. 

Features 

The Korsar development programme has drawn on Russia's rich experience in patrol vessel design and operations, in international conventions on sea rescue and pollution prevention, as well as in national standards for sea systems survivability, crews' working conditions, and weapons employment. 

The ship's hull is divided into 13 watertight compartments by lateral bulkheads. The hull itself is made of low-alloy steel, while external walls of the superstructure are made of carbon steel, and internal walls – of aluminium-magnesium alloy. The ship is equipped with active and passive roll stabilisers to reduce roll amplitude in high sea. 

All crew's cabins and service compartments are air-conditioned to provide comfortable conditions during long-term cruises in any season of the year. The ship has good seaworthiness and high manoeuvrability. It is armed with diverse powerful weapon systems. Its secondary radar, electromagnetic and thermal signatures, as well as level of underwater noise and its interference with the sonar operation, are significantly reduced. 

Armament & Equipment 

Missile weapons 

Uran-E ASM system (4x4 launchers, 16 missiles), or Yakhont ASM system (2x4 launchers, 8 missiles), or Club-N ASM system (1x8 below-deck vertical launcher), or Moskit-E/Moskit-MVE ASM system (2x4 launchers, 8 missiles) 

Anti-submarine missile, torpedo and anti-torpedo systems 

-six single-tube torpedo launchers to fire missile-torpedoes or torpedoes SET-65, 53-65KE; 

-RPK-8E ASW missile system, comprising one RBU-6000 12-tubed depth bomb launcher for single/salvo firings of 90RE rockets with a gravitational underwater projectile, and ammunition loader (not installed on ships armed with Moskit-E/Moskit-MVE/ Club-N ASM systems); 

-Purga torpedo and bomb fire control system for missile torpedoes, torpedoes and rockets with gravitational underwater projectiles launched against surface and underwater targets. 

Artillery systems 

-100mm A-190E multipurpose gun mount with 5P-10E fire control system; 

-two 14.5mm naval machine gun mounts. 

Air defence missile systems 

-Klinok AD missile system with four eightcanister drum-type launchers; 

-Kashtan ADGMS comprising one command and control module and two combat modules (64 SAMs, 6,000 rounds). When mounted on ships with Moskit-E/Moskit-MVE ASM systems, Kashtan command module has no TAR and receives designation data from Sigma-E combat information management system. 

Kashtan system can be replaced, at customer’s request, by two Palma AA artillery systems with Sosna-R SAMs and electro-optical fire control system. 

ECM systems 

-MP-407E ECM system (option – TK-25E); 

-Spektr-F laser-emitting equipment; 

-PK-10 short range jamming system (option – Prosvet-M). 

Air systems 

Ka-28 ASW helicopter or Ka-31 radar picket helicopter in a fixed hangar with maintenance equipment, munitions, etc. 

Aircraft support assets 

-helicopter control stations; 

-aircraft ammunition; 

-lighting and other equipment. 

Anti-saboteur weapons 

DP-65 anti-saboteur system (three ten-barrel grenade launchers RG-55M grenades fired at targets designated by MG-747 dipping sonar (options – Anapa-47 or Pallada) 

Electronic equipment 

-Fregat-MAE-3 3D automated radar with Poyma-E data processing system; 

-Monument-E multifunction radar system; 

-67R IFF radar system; 

-Amga self-contained submarine detection system with unified radioacoustic datalink; 

-Podzagolovok-23 basic collective mutual interference avoidance system; 

-Ogon-50 IR night group navigation system. 

Sonar equipment 

Zarya-ME sonar system with hull-mounted and towed arrays. 

Combat information management system 

Sigma-E system. 

Navigation equipment 

-MR 212/201-1 navigation radar; 

-Gorizont-25E integrated navigation system; 

-Topaz-5 automatic position plotter; 

-LI2-1ME log; 

-NEL-20K echo sounder; 

-KM115-07 magnetic compass; 

-MS-98 weather station; 

-RN naval direction finder; 

-VNTs-452 surveillance and target designation sight; 

-NAVTEX Morena-1 radio receiver; 

-Ladoga gyroscopic stabilisation system. 

Communications, relay and visual observation equipment 

-Buran-6E automated communications system; 

-VHF radiotelephone station; 

-Musson communication system; 

-intership voice transmission system; 

-optical devices; 

-searchlights, pyrotechnic means, code flags and figures; 

-binoculars and other equipment. 

Main propulsion plant

The ship is powered by a two-shaft COGAG gas-turbine propulsion plant with fixedpitch propellers. It comprises a cruise propulsion unit with two gas-turbine engines, two-speed reduction gearboxes and a cruise reduction gear attachment allowing either cruise engine to rotate shafts on both sides, as well as a booster unit including two gas-turbine engines and two boost onespeed reduction gearboxes. Electric power is supplied by two power stations comprising five diesel generators. Auxiliary power unit includes two automated boilers with a steam capacity of 1,000 kg/h and a working pressure of 5 kg/ cm².