New Stealth Warship Gremyashchy-class corvettes (Project 20385) – Russia – Update I

The Gremyashchy class (Russian: гремящий – “thunderous”) is an advanced development of the Steregushchy-class corvette of the Russian Navy. This follow-on project was designed by the Almaz Central Marine Design bureau in Saint Petersburg. The first ship was laid down on 26 March 2011 and the official ceremony took place on 2 February 2012.

The ships of the Gremyashchy class are very large multipurpose corvettes, designed to complement the Steregushchy-class ships already commissioned or being built for the Russian Navy. They have been designed to have an improved habitability for higher endurance missions, and are able to launch cruise missiles.

Project 20385 – 0+2 units

Yard №
Laid Down
«Severnaya verf`», Sankt-Peterburg – 0+2 units
under construction
under construction


‘Red’ Corvette: Russia Ready to Install Engines in Its New Stealth Warship: HERE

Project 20385 (20380M) has been developed by the Central Marine Design Bureau “Almaz” on the basis of already being mass-produced in the fleet ships of “Guarding” 20380 with the current requirements and operating experience. From predecessors, the new ship differs increased to 2,200 tons displacement and size. Its length will be 105 meters, width – 13 m, draft – about 8 meters.

See details of Steregushchy-class ship (Project 20381): HERE

CIpnqhLUEAAuPvTRussian Navy Steregushchy-class corvette 532 «Boikiy» seen during recent maneuvers in Baltic Sea

The Gremyashchy-class corvettes were designed with German MTU diesels for propulsion. Because of sanctions arising from the Ukrainian conflict, deliveries of MTU diesels beyond the first two units were stopped, resulting in the cancellation of further units. Instead, new units of the preceding Steregushchy-class corvette are being ordered.

The Gremyashchy-class corvettes differ from their predecessors of the Steregushchy class by greater dimensions and displacement. They have a steel hull and composite superstructure, with a bulbous bow and nine watertight subdivisions.

Differences in missile layout between Steregushchy class (below) corvette and Gremyashchy class( above)

Compared with the SoobrazitelnyBoikySovershenny and Stoiky ships, which are fitted with Redut air defense VLS system of 12 launchers on the bow, these new ships are equipped with a UKSK VLS system comprising 8 launchers for SS-N-27 or SS-N-26 cruise missiles instead. The Redut VLS system with 16 launchers has been replaced on the stern.

UKSK VLS system

UKSK VLS cellsImage

SS-N-27 (Club N)

The Novator Design Bureau developed the Club anti-sub/ship cruise missile system [sometimes referred to as the Klub, Biryuza and Alpha/Alfa]. There is some confusion as to whether the SS-N-27 designation applies to this missile, or to the P-900 Alfa [industrial code 3M-51 ] , although the best evidence suggests that the 3M-54 Alfa is the SS-N-27, rather than the 3M-51 Alfa.

The Club missile system is designed to destroy submarine and surface vessels and also engage static/slow-moving targets, whose co-ordinates are known in advance, even if these targets are protected by active defences and electronic countermeasures.

There are two ‘known’ modifications of the system; Club-S (for submarines) and Club-N (for surface vessels). The Club-N can be installed in vertical launch cells or in angled missile boxes. Both systems are based on common hardware, the only difference being the design of the missile launchers and missile transport-launching containers.

Five types of missiles – 3M-54E, 3M-54E1, 3M-14E, 91RE1 and 91RE2 – have been developed for the Club ASCM.

The Club-N can be armed with a 3M-54E or 3M-54E1 anti-ship missile, 3M-14E submarine-to-coast missile or a 91RE2 anti-submarine torpedo.

Advanced 3M-54E Club Anti-Ship Missile

Advanced 3M-54E Club Anti-Ship Missile – Supersonic 3M-54E1 anti-ship missile 

9M100 and 9M96 anti-aircraft missile

9M96 anti-aircraft missile9M96 anti-aircraft missile @RT news9M100 @bastion-opk.ru20385_model_0416 Redut VLS 

Redut VLS for 16 9M96E (120 km range) SAMs or 64 9M100 (10 km range) SAMs

Combat power of the modernized craft greatly enhanced by introducing into the arms of a new universal missile complex “Caliber-NK” (instead of anti-ship complex “Uran”) with a uniform 8-cell launcher for several types of missiles – anti-shooting and coastal targets. Anti-aircraft weaponry corvette enhanced anti-aircraft missile system, “Red”, 9M100 and 9M96 missiles (supplied from 16 to 64 missiles). Artillery weapons – a 100-mm artillery mount A190-01, two 30-mm AK-630M, anti-submarine – a set of “Package”. On the ship is provided basing anti-Ka-27PL.

100-mm А190- 01 Lightweight Multipurpose Naval gun

03.jpgdc8c677a-1b24-42ad-b2dc-176c6e06dd87Original 100-mm А190- 01 Lightweight Multipurpose Naval gun

Burevestnik manufactures two variants of 100-mm А190 Lightweight Multipurpose Naval gun: А190E and А190-01.

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


Projectile weight, kg


Number of ready-to-fire rounds


Weight, t


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.


2 x AK-630M

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


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)







Chamber Volume


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




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


Muzzle Velocity

All:  2,953 fps (900 mps)
3M87:  2,822 fps (860 mps)
Palash:  3,609 fps (1,100 mps)

Working Pressure


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



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)


MTPU 14.5mm marine pedestal machine-gun mount


Technical Characteristics


machine-gun KPVT

Machine-gun calibre, mm


Rate of fire, shot/min, not less


Mass of a mount with a machine-gun (without ammunition and SPT&A),kg


Overall dimensions (with the height 
of foundation from the deck 100 mm), mm: 


Angle of elevation guidance, degrees

-15 to +60

Angle of traverse guidance, degrees


Direction of a machine-gun feed


Method of guidance


Crew, persons


Another difference is the lack of the aft mast above the helicopter hangar, and single integrated mainmast that no longer includes separate open shelves for artillery and navigation radars.

Main mast

SONY DSCGremyashchy-class corvettes @Naval AnalysesGremyashchy-class corvettes @Naval Analyses15-4075117-vid-sverkhu-3Gremyashchy-class corvettes @Naval Analyses

An important feature of the new ship – the presence of so-called “optronic mast”, which includes radar systems and systems for various applications, greatly increasing the possibility of corvettes for the detection and tracking of air and sea targets of the enemy, their defeat. In particular, the mast is allowed to refuse a single antenna station fire-control radar “Puma”.

Russian-corvette-2Main mast


Antenna post radar “Furke-E” housed in radome on top of mast 

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.

Multi-purpose navy radar system “Zaslon”


Multi-purpose navy radar system “Zaslon” is designed for:

  • Illumination of the air, surface and signal environment with active radar channels of X and S wavelength bands and passive radar channels of L, S, C, X, Ku wavelength bands, with their operation adapted to the existing environment and ship’s priority tasks
  • Active jamming (in Х, Кu frequency bands) and active jamming equipment control
  • Target designation to weapon control systems
  • Control of shipboard gun mounts

Additionally, “Zaslon” navy radar can ensure radio monitoring in short-wave and VHF wavelength bands.

“Zaslon” navy radar ensures solution of the following tasks:

  • Search, detection and tracking of air targets, low-altitude pin-point targets, surface targets, shore-based radiocontrast targets
  • Automatic recognition and classification of tracked targets
  • Detection of radiation sources, recognition of radiating equipment classes and types, including those in the far-field region
  • Estimation and analysis of electronic environment, position finding of jamming sources
  • Active countermeasures
  • Control of passive jamming equipment
  • Weapons control
  • Information support to the benefit of flights of fighters, ground attack aircrafts, shipboard helicopter on patrol and search-and-rescue problem missions, etc.
  • Automatic performance monitoring and troubleshooting
  • Recording of information processing results, worked out decisions and conditions of mating systems
  • Personnel simulated training

Use of directional pattern electronic scanning, special modes and algorithms of target surveillance, acquisition and tracking in “Zaslon” navy radar ensures short response time, high throughput rate, exact target designation accuracy, and thus highly efficient use of mating systems’ possibilities.

“Zaslon” navy radar has substantial possibilities for update, since design of its component parts allows changing the equipment components and tasks to be solved, depending on the ship purpose. “Zaslon” navy radar capacities are adaptable to various functions to be fulfilled in combat conditions.


RLK “Zaslon” on project 20385 ships (4 X-band, 4 S-band ,AESA, 200 km range, datalink for 9M96D)

Puma 5P-10  fire control radar

Puma 5P-10E

5P-10E General-Purpose Radar Control System (5P-10E RCS) is designated for optimal fire control of 25–305-mm naval artillery systems. The radar control system can perform the following tasks:

  • „automatic reception of target designation data from shipborne means, acquisition and tracking of up to 4 targets;
  • automatic missed firing measurement and firing correction, also using antenna post electronic and optical means;
  • аutomated RCS efficiency control with faults indication and generation of recommendations on fault repair;
  • naval artillery system combat crew training using simulated targets under simulated interference conditions with a possibility to engage targets with practice missiles;
  • аutonomous air, sea and coastal target detection (in standby mode) in 360° surveillance and sector scanning modes;

intercept of the missile taking off from the tracked target.

5P-10E Radar Control System

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



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


Navigational radar


Here is open hardware-software structure with possibility to build up subfunctions of ship automated control:

– continuous computing and displaying of ship location and motion parameters oriented to marine charts and radar image.
– possibility of preliminary and actuating route plotting.
– efficiency, adequate accuracy for navigational parameters.
– color division for information and high resolution of data displayed.
– integrated solution for navigation problems and ship collision avoidance warning.
– keeping the electronic ship’s journal and reproduction of registered navigational information.
– improved reliability for navigation monitoring and collision avoidance.
– equipment compactness and ease of control.
– self-contained operation of component parts of the complex at one of the device failure.
– wide range of interfaced navigational equipment (liggers, gyros, receiver-indicator satellite systems, echo sounders).
– possibility to increase the number of indicators with ECDIS.
– store plotting on paper charts with the help of digitizer (optional).

The complex includes:

– NRS “Gorizont-25” (device AP, I-27M2K).
– electronic chart navigational-information system – “Pribor МК-54IS”.
– satellite navigational receiver МТ-102 with power supply IP ~ 220/=24V.
– digitizer Yeoman Navigator Pro with communicator (optional).
– UPS – device IBP.
– printer.
-power distribution box. 


EW Suite: TK-25E-5 ECM

TK-25E-5 ECM system is designed to inter-cept emissions of airborne and shipborne tar-get acquisition radars, weapons control radarsand anti-ship missile radar seekers, to performautomatic signal classification, todeterminemost dangerous approaches of attacks againstthe ship, and to provide jamming in threatdirections.TK-25E-5’s configuration dependson carri-er-ship type and displacement. (

Countermeasures: 4 x PK-10 decoy launchers


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


Paket-NK anti-torpedo

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


Kolomna 16D49 is a four stroke V16 cylinder diesel engine with 260 x 260 mm bore and stroke, rated at 4.4 MW at 1,000 rpm .Kolomna 16D49 is a four stroke V16 cylinder diesel engine

Kolomna 16D49 is a four stroke V16 cylinder diesel engine with 260 x 260 mm bore and stroke, rated at 4.4 MW at 1,000 rpm

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)

[Image: img7651.jpg]Russian DDA12000 diesel

Ka-27 Helicopter

General characteristics
Class and type: Project 2038.5
Type: Corvette
Displacement: 2,200 tons
Length: 104.5 m (342.8 ft)
Beam: 11 m (36.1 ft)
Draught: 3.7 m (12.1 ft)
Installed power: AC 380/220 V, 50 Hz, 4 × 630 kW diesel genset
Propulsion: 2 shaft CODAD, MTU diesels
Speed: 26 knots (48 km/h; 30 mph)
Range: 3,800 nmi (7,000 km; 4,400 mi) at 14 knots (26 km/h; 16 mph)
Endurance: ?
Complement: ?
Sensors and
processing systems:
·Air search radar: Furke-E 3D, E/F band

·Surface search radar: Granit Central Scientific Institute Garpun-B/3Ts-25E/PLANK SHAVE radar

·Monument targeting radar

·Fire control radar: Ratep 5P-10E Puma for A-190

·HOT FLASH radar

·Sonar: Zarya-ME suite, bow mounted. Vinyetka low frequency active/passive towed array

·Navigation: GORIZONT-25 integrated navigation system

Electronic warfare
& decoys:
·EW Suite: TK-25E-5

·Countermeasures: 4 × PK-10

Armament: ·1 × 100 mm A-190 Arsenal naval gun

·1 × 8 UKSK VLS cells for Oniksor Kalibr or Medvedka

·2 × 8 Redut VLS cells

·2 × AK-630CIWS

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

·2 × 14.5 mm MTPU pedestal machine guns

Aircraft carried: Hangar for Ka-27 Helicopter

Main material source:


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