Project 20380 Steregushchy Class Corvettes, Russia

The Steregushchy class (Russian: стерегущий – “vigilant”) is the newest class of corvette in the Russian Navy. It was designed by the Almaz Central Marine Design bureau. The first ship was designated Project 2038.0 (or 20380) by the Russian Government; subsequent vessels were built to an improved design, Project 20381. At 2,200 tons it is large for a corvette and is designated as a frigate by NATO. Project 20382 “Tigr” is an export variant that has been ordered by Algeria. Project 20385 is another variant.

This type has been further developed into the Gremyashchy-class corvette.

The Steregushchy (530)

Project 20380 Steregushchy Class corvettes are the new multirole vessels being built by the JSC Severnaya Verf shipyard and Amur Shipbuilding Plant for the Russian Navy. Steregushchy Class corvettes are intended to replace the Grisha Class corvettes.

Project 20381 Soobrazitel’niy Corvette: Here


Steregushchy Class can be deployed in coastal patrol, escort and anti-submarine warfare (ASW) operations. The vessels can engage surface ships, submarines, aircraft and shore-based targets.

The first corvette in its class, Steregushchy, was laid in December 2001 and launched in May 2006. It began sea trials in November 2006, for commissioning into the Baltic fleet in November 2007.

Steregushchy (530) – Image

The second ship in class, Soobrazitelny, was laid in May 2003 and launched in March 2010. It was delivered to the Russian Navy in July 2011.

Boyky was laid in July 2010 and launched in April 2011 for the commissioning in 2013. Sovershenny was laid in June 2006. It is expected to be launched in 2013 for the commissioning in 2014. Stoyky was laid in November 2006. It was launched in May 2012 for the commissioning in 2013. Construction of the sixth ship in class, Gromky, began in February 2012.

Gremyashchy-class corvette Project 20385: Here


In June 2011, United Shipbuilding Corporation (USC) signed a contract with Russia’s official weapons exporter Rosoboronexport to supply two new Tiger Class corvettes for the Algerian Navy. Tiger Class is an export variant of the Steregushchy Class corvette.

Russia Holds Keel-Laying Ceremony of Rezky Corvette at Country’s Far East: Here

Project 20380


Project 20380 – 4+6 units

Yard №
Laid Down

«Severnaya verf`», Sankt-Peterburg – 4+2 units


Amur Shipyard, Komsomolsk-on-Amur – 0+4 units

plan 12.2016
under construction
under construction
Geroy Rossiyskoy Federatcii Aldar tcydenzhapov
under construction
plan 1.07.2016
under construction


Steregushchy Class design features

Steregushchy (530) – Image

Steregushchy Class was designed by the Almaz Central Marine Design Bureau. The corvette incorporates a steel hull, composite superstructure and a bulbous bow. The hull is divided into nine watertight subdivisions.

The stealthy design significantly reduces the radar signature of the ship. The acoustic, infra-red, magnetic and visual signatures were also reduced by incorporating the stealth technology in the construction of the warship.

Steregushchy Class has an overall length of 105m, width of 13m and draft of 3.7m. Full load displacement of the ship is 2,100t. The vessel can sail at a maximum speed of 27kt. It can complement 100 personnel, including helicopter maintenance crew.

Corvette command and control systems

The Steregushchy Class features Sigma combat information management system. The system collects information from the radars and sensors and provides real-time situational awareness. It also allows the ship to exchange intelligence information with other naval units in the battle-group.

Steregushchy Class weapons and missiles

The Steregushchy Class is armed with a combination of missile systems, including Kh-35 missiles and 3M-54 Klub missiles. Two Kashtan anti-aircraft systems on-board provide close-in air defence against anti-ship missiles, aircraft and small surface targets. Beginning from Soobrazitelny, the new ships in class are being armed with the REDUT-K SAM system, in place of Kashtan system.


(№1001 – 1 3M87-1 «Kortik-M» CIWS module – 8 SAM launchers, 2×6 30 mm (64 9M311 missiles, 12000 rounds)),

Kh-35 anti-ship missiles

The Kh-35E (3M-24E) anti-ship missile is designed to destroy surface warships displacing up to 5,000 tonnes, as well as seagoing transports.

The Kh-35E unified guided missile can be launched from the following platforms:

– Uran-E type ship-borne missile systems;

– Bal-E type mobile coastal missile systems;

– tactical and naval combat aircraft.

The Kh-35E anti-ship missile can be employed in fair and adverse weather conditions at Sea States up to 5-6, by day and night, under enemy fire and electronic countermeasures.

The Kh-35E’s aerodynamic configuration is optimized for high subsonic-speed sea-skimming flight to ensure stealthy characteristics of the missile.

Target acquisition and designation data can be fed into missile’s guidance system from both ship-based and external target data sources.

The missile has low signatures thanks to its small dimensions, sea-skimming capability and a special guidance algorithm ensuring highly secure operational modes of the active radar seeker.

Its ARGS-35E active radar seeker operates in both single- and multiple-missile launch modes, acquiring and locking on targets at a maximum range of up to 20 km.

Missiles, employed in ship-based and land-based missile system, are delivered in sealed transport-launch containers. This ensures proper level of reliability of the system in harsh climatic conditions and low maintenance man-hours required for its servicing on carriers.



 Launch range, km  up to 130
 Flight altitude, m:
 en route  10-15
 at terminal area  about 4
 Cruise speed, Mach number  0,8
 Max missile turn angle, ang.deg.:
 in horizontal plane after launch  +;- 90
 Missile launch weight, kg:
 ship/land-based versions  620/620
 aircraft/heliborne versions  520/610
 Warhead type  HE penetrator
 Warnead weight, kg  145
 Missile dimensions,m:
 length of ship/land-based
 and heliborne versions  4,4
 length of airborne version  3,85
 body diameter, m  0,42
 wing span  1,33



There seems to be no records indicating that the Steregushchy is armed with the 3M-54 Klub missiles as the launch tubes are different from the Kh-35E missiles.

1 3M87-1 «Kortik-M» CIWS module & 8 SAM launchers



AA guns two AO-18KD guns
Artillery rounds 1.000 pcs
Control system radar, optronic
AA guns 500-4.000 m
AA guns 0-3.000 m
AA guns: caliber 30 mm
total rate of fire 10.000 rds/min

9M311-1E anti-aircraft missile


Armament: SAM 9M311-1E
Ammunition: SAM 48/32 missiles
Control system radar, optronic
Engagement envelope: 
Range: SAM
1.500-10.000 m
Altitude: SAM 2-6.000 m
Weights: missile in the canister 60 kg
missile w/o canister 42 kg
warhead 9 kg

The main gun fitted forward is an Arsenal A-190 100mm naval gun. Two 30mm six-barrelled AK-630M automatic gun mounts are also installed on the vessel. The AK-630M can fire up to 5,000 rounds a minute for a maximum range of 5,000m. Steregushchy is fitted with two quadruple torpedo tubes for Paket-E/NK antitorpedo missile.

A-190 100mm naval gun


100-mm А190 Lightweight Multipurpose Naval Gun is a single-barrel turreted automatic gun that may be installed on ships with the displacement of 500 t and more. Upon the operator’s command the fire control module automatically turns the artillery system to standby or combat-ready position, ensures ammunition selection and feeding, gun laying and firing. As a result, the artillery system has minimum response time and high rate of fire.

Main technical data

Rate of fire, rpm up to 80
Maximum firing range, km over 20
Elevation, degree -15 to +85
Training, degree ±170
Projectile weight, kg 15,6
Number of ready-to-fire rounds 80
Weight, t 15

А190 Naval Gun can fire HE (impact fuze) and AA (time fuze) case ammunitions.
The main advantages of А190 system:
– automatic firing mode with main and back-up control means and the capability to operate in EW battlefield environment;
– minimal dead zones when engaging various target types;
– fast reaction (2…5 sec) to counter air threats. Quick shift of fire when engaging multiple targets.

The upgraded version designated as А190-01 provides significant increase in combat effectiveness. High survivability, reliability and combat effectiveness make it possible to operate the gun in various environments day and night all year around. Data

s 04
Steregushchy (530) Image



The gun itself is a 6 barrel Gatling gun designated as AO-18.  The barrels are in a single block, having exhaust-driven joint automatics.  They are belt fed with a flat magazine in the AK-630 and a drum magazine in the AK-630M.  These weapons form a part of a complete self-defense system called A-213-Vympel-A, which includes gun, radar, optical and TV control systems.  A single MP-123 Vympel system can control two 30 mm guns or one 30 mm and one 57 mm gun.  This system can engage air targets at ranges up to 4,000 m (4,400 yards) and surface targets at ranges up to 5,000 m (5,500 yards).  The TV control system can detect MTB sized ships at the distance of 75 km (40 nm) and the fighter-size air targets at 7,000 m (7,600 yards).  This system is completely automatic and does not require human supervision although it can be directed from optical control posts in case of damage or for firing on shore targets.

6 barrel Gatling gun designated as AO-18


The AK-306 (A-219) system was a modification of the AK-630 (A-213) system for use on light ships, like air cushion craft, ekranoplanes and small displacement motor boats.  Externally, there was no difference between AK-306 and AK-630 guns, but internally instead of using the exhaust to power the automatics, the AK-306 (A-219) used electricity.  This version also lacked radar control, being only optically guided, hence making it less of a anti-missile weapon and more of a surface-to-surface weapon.  The design started in 1974 and the system was accepted into service in 1980.  By 1986, 125 systems were in service.

Date Of Design 1963
Date In Service AK-630:  1976
AK-630M:  1979
AK-306:  1980
3M87:  1989
Gun Weight AO-18 (for AK-630):  under 452 lbs. (under 205 kg)
AO-18L (for AK-306):  341.7 lbs (155 kg)
GSh-6-30K (for AK-630M1-2):  352.5 lbs. (160 kg)
Gun Length oa 64.13 in (1.629 m)
Bore Length 63.78 in (1.620 m)
Rifling Length 57.48 in (1.46 m)
Grooves 16
Lands N/A
Twist N/A
Chamber Volume N/A
Rate Of Fire AK-630:  4,000 – 5,000 rounds per minute
AK-630M:  4,000 – 5,000 rounds per minute
AK-630M1-2:  10,000 rounds per minute
AK-306:  600 – 1,000 rounds per minute
3M87:  10,000 rounds per minute
Palash:  1,000 rounds per minute


Type Fixed
Weight of Complete Round 1.834 – 1.839 lbs. (0.832 – 0.834 kg)
Projectile Types and Weights HE-FRAG (OF-84) – 0.86 lbs. (0.39 kg)
FRAG tracer (OP-84) – 0.86 lbs. (0.39 kg)
Bursting Charge HE-FRAG (OF-84) – 0.107 lbs. (0.0485 kg)
FRAG tracer (OP-84) – 0.026 lbs. (0.0117 kg)
Projectile Length up to 11.54 in (293 mm)
Propellant Charge N/A
Muzzle Velocity All:  2,953 fps (900 mps)
3M87:  2,822 fps (860 mps)
Palash:  3,609 fps (1,100 mps)
Working Pressure N/A
Approximate Barrel Life AK-630:  8,000 rounds (automation resource)
AK-306:  18,000 rounds
Ammunition stowage per gun AK-630:  2,000 rounds
AK-630M:  2,000 rounds
AK-630M1-2:  4,000 rounds
AK-306:  500 rounds


Elevation With 1.2 lbs. (0.54 kg) HE/Frag Shell
Max Ballistic Range 8,860 yards (8,100 m)
Self Liquidation range 5,470 yards (5,000 m)
Effective Targeted Range  4,375 yards (4,000 m)


The AK-630M can fire up to 5,000 rounds a minute for a maximum range of 5,000m. Steregushchy is fitted with two quadruple torpedo tubes for Paket-E/NK anti-torpedo missile.

Paket-NK anti-torpedo

2 × 4 330 mm torpedo tubes for Paket-NK anti-torpedo/anti-submarine torpedoes


chien ham Soobrazitelny_13

Sensors / radars and helicopter deck

project20381_kto (15)_bhvw

The sensor suite consists of a Furke-E 3D, E/F band air search radar, a Garpun-B/3Ts-25E/Plank Shave surface search radar, Hot Flash radar, Ratep 5P-10E Puma fire control radar and a Monument targeting radar. The corvette is also equipped with a Zarya-ME sonar suite and Vinyetka-EM towed sonar array.



“Furke-E” development NIIRT Concern PVO “Almaz-Antei” The range of radio waves – E  Radar detection of the total air and surface targets and target housed in a dome on the top mast.


TTX given in three trim levels radar “Furke-E” (ist. – NIIRT booklet):

option 1 Option 2 Option 3
Range Review 60 km 150 km 60 km
Sector Review azimuth 360 degrees 360 degrees 360 degrees
Sector review in elevation 6 degrees 4 ° 15 degrees
Detection range of sea targets 0.95 radio horizon 0.95 radio horizon 0.95 radio horizon
The detection range of aerial target with EPR 1 sq.m 60 km 120 km 52/60 km
War emergency power      
Range Review 40 km 150 km 60 km
Sector Review azimuth 360 degrees 360 degrees 360 degrees
Sector review in elevation 60 degrees 80 degrees 30 degrees
Height 15 km 20 km
The detection range of aerial target with EPR 1 sq.m 30km 75 km 52 km
Detection range RCC ESR of 0.02 m at a height of 5 m 10km 12-14 km 12 km
Suppression of reflections from a fixed underlying surface 50-55 dB 50-55 dB 50-55 dB
Accuracy of coordinate measuring range 50m 50m 50m
Accuracy of coordinate measuring azimuth 4-6 points rangefinder 4-6 points rangefinder 3-4 points rangefinder
Accuracy of coordinate measuring elevation 8-9 points rangefinder 5-7 points rangefinder
Range resolution 150-200 m 150-200 m 150-200 m
Azimuth discrimination 3.2 degrees 3.2 degrees 2 °
Number of simultaneously tracked targets 100 200 50
Energy consumption 8 kW 25 kW 7.5 kW
Weight of antenna post 420 kg 890 kg 90 kg
Weight of the entire radar equipment 1100 kg 2450 kg 860 kg
Mean time before failure 850 hours 850 hours 850 hours

Monument targeting radar


Radar targeting RCC “A Monument” in the radome, combined with the design of the foremast Radar “Monument-E” radar or “Mineral-ME” or active phased array radar Seastar Thales (X band) – See diagram below it is within the main mast

chien ham Soobrazitelny_8

Ratep 5P-10E Puma fire control radar


Puma 5P-10  fire control radars in the center of the picture before the main mast above the dome – control radar for the 100 mm gun and 2 illuminators for the Palash CIWS on top of the bridge before the main mast

Control and guidance – OMS “Puma” 5P-10 TV sighting (export version – 5P-10E) with radar and external opto-electronic module based on a gyro-stabilized platform GOES-140. Developed in KB “Amethyst”. The automatic control and monitoring. The system can simultaneously track the target 4-fire with automatic generation of data on the two most threatening of them. On TFR pr. 20380 set modification MSA 5P-10-02 without channel target detection (antenna under the radome of the antenna structure of the post).

Target detection range – up to 60 km
reaction time:
– Air purpose – to 5 seconds
– surfaced / Coast goal – 10-15 seconds
the transfer of fire to the next target in a stream – up to 1 sec


Main specifications
Tracking mode operation range:
by distance up to 60 km
by elevation up to 85 deg.
by azimuth ±200 degrees
360° surveillance mode operation range:
by distance not less than 30 km
by elevation up to 35 deg.
by azimuth 360 deg.
Response time:
from the beginning of automatic tracking till fire readiness not more than 3 s
when transferring fire to a 6°x3° sector not more than 1 s
Combat crew 2 persons
total not more than 3700 kg
including antenna post not more than 2100 kg
Special features
  •         Optimal solution for all types of artillery fire control systems modernization and cutting edge equipping of all classes of ships under construction.
  •         Simultaneous gunfire control of several naval guns against one or two air, sea or coastal targets in automated mode.
  •         Automatic adaptation to interference protection and high-noise immunity.

Puma 5P-10

Steregushchy Class has a stern helicopter deck and hangar, to support the operations of a Ka-27 helicopter for use in reconnaissance and anti-submarine missions.

chien ham Soobrazitelny_4

Countermeasures and propulsion of the Russian Naval vessels

The countermeasures equipment includes a TK-25E-5 ECM system and PK-10E decoy system. The TK-25E-5 can tap emissions of air and surface target acquisition radars, fire control radars and ASM radar seekers.

TK-25E-5 ECM systemfNPjHwR

TK-25E-5 ECM system is designed to intercept emissions of airborne and shipborne tar-get acquisition radars, weapons control radar sand anti-ship missile radar seekers, to perform automatic signal classification, to determine most dangerous approaches of attacks against the ship, and to provide jamming in threat directions.TK-25E-5’s configuration depends on carrier-ship type and displacement. (

PK-10E is equipped with a KT-216-E launch system, firing AZ-SO-50/AZ-SOM-50 rounds to deceive radar and optically guided incoming missiles.

Countermeasures: 4 x PK-10 decoy launchers, 4 x PU CT-216


AZ-SO-50/AZ-SOM-50 rounds


These rockets are designed to protect small, medium and large displacement ships against guided weapons at close ranges by setting up distracting decoy targets. The rockets are launched from the KT-216 launcher of the PK-10 shipboard system.

The following three types of the caliber rockets are developed and series produced:

      • SR-50 radar jamming rocket;
      • SO-50 optronic jamming rocket;
      • SK-50 combined jamming rocket.

Basic characteristics

SR-50 SO-50 SOM-50
Caliber, mm 120 120 120
Length, mm 1,226 1,226 1,226
Weight, kg
– rocket 25.5 25 25
– payload 11 7.3 9.1
Payload type chaff IR, laser chaff, IR, laser
Operating temperature range, ° C from -40 to +50


Steregushchy Class corvettes are powered by a combined diesel and diesel (CODAD) propulsion system.

The four 16D49 diesel engines develop a total power output of 23,320hp. Four diesel sets on-board generate 2,520kW electricity for shipboard lighting.

The engines are installed on damped platforms and the diesel gen sets are hooked to the second deck to achieve noise abatement.


4 diesel and 2 reducers Interview with chief designer of factory “Kolomna” Valery Ryzhoviesel mod 16D49 6000 hp AC and gearboxes / reverse RDD-12000  (set up)

The propulsion system provides a maximum speed of 27kt and a cruising range of 4,000mi at 14kt speeds. Steregushchy Class has an endurance of 15 days.

Main material source:


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