India’s state-run Garden Reach Shipbuilders and Engineers – GRSE to Export Light Frigates to Philippines

Asian Defence News

Saturday, May 14, 2016

In a major win for the Indian warship building industry, India’s state-run Garden Reach Shipbuilders & Engineers (GRSE) Ltd has emerged as the winner for Philippine Navy’s big-ticket modernization program.

GRSE was the lowest bidder to supply two light frigates and hopes to seal the contract worth more than $321 million in the next two months, said one GRSE official.

A total of four firms joined the bidding for the Philippine Navy project: GRSE; Hyundai Heavy Industries Inc. and Daewoo Shipbuilding & Marine Engineering Co. Ltd., both from South Korea; and Navantia S.A. of Spain.

GRSE, administered by the Indian Ministry of Defence, has built 95 warships, including frigates, corvettes and fast patrol boats, since 1960.

GRSE’s light frigate will be a design based on the Indian Navy’s Kamorta-class anti-submarine corvette and will be capable of withstanding Sea State 7, which means it can withstand a wave height of up to 9 meters.

The 2,000-tonne frigate will be 95 meters long, have a combined diesel and diesel (CODAD) configuration propulsion system and be able to work in an area contaminated with nuclear, biological, and chemical agents.

In addition, it will have a tactical data link and radio capable of tactical communication. The frigates will have 76mm naval guns and fire control radar with a built-in electro-optical tracking system integrated into the Combat Management System (CMS).

The state-owned Goa Shipyard is also building two OPVs for the Sri Lankan Navy under India’s government-to-government exchange agreement with Sri Lanka. First OPV will be delivered by end of this year and second OPV by middle of next year.

Source asian-defence-news


*Note – The bid was later cancelled and Korea was picked as winner

Kamorta Class ASW Corvettes


Design features of Kamorta Class

The Kamorta Class features high tensile indigenous steel hull incorporating a superstructure made of indigenous DMR 249A steel and Carbon Fibre Reinforced Plastic (CFRP) materials. The hull and superstructure are designed to achieve low radar cross section.

The stealthier hull form is designed to deliver excellent sea keeping and manoeuvrability characteristics while also ensuring lower noise and vibration levels. The ASW corvette includes indigenous content of about 90%.

The corvette has an overall length of 109.1m and breadth of 12.8m. The standard displacement of the vessel is 2,500t. The ship complements a crew of 123 including 17 officers and 106 sailors.

Naval gun systems

The OTO Melara 76mm Super Rapid Gun Mount (SRGM) on the bow deck will deliver a rate of fire of 120 rounds per minute. The gun can fire standard ammunition for a maximum range of 16km.

OTO Melara 76mm Super Rapid

OTO Melara 76mm Super Rapid Gun Mount

Two AK 630 CIWs (Close-In Weapon Systems), each mounted on either side of the deck, provide close-point defence against anti-ship missiles, precision guided weapons, low flying fixed or rotary wing aircraft and small craft.

Two AK 630 CIWs

Two AK 630 CIWs (Close-In Weapon Systems)


30×165mm AO-18


6 (× 2)


Gas-operated rotary cannon


+88° … -12° (50°/sec)
+90° … -25° (60°/sec) AK-630M-2


±180° (70°/sec)
±180° (80°/sec) AK-630M-2

Rate of fire

4,000–10,000 rounds/min

Muzzle velocity

880–900 m/s (2,900–3,000 ft/s)

Effective firing range

4,000 m (13,000 ft) (aerial)
5,000 m (16,000 ft) (maritime)
5,000 m (16,000 ft) (all) AK-630M-2

Maximum firing range

the projectiles self-destruct past 5,000 m (16,000 ft) range

Feed system

Belt, 2,000–4,000 rounds


Radar / TV-optical



1 or 2 AO-18 autocannons


4 9A4172 missiles (Vikhr-K upgrade)


Sensors and countermeasures

The Kamorta Class integrates Revati 3D surveillance radar, fire control radars and HUMSA (Hull Mounted Sonar Advanced).

Revati 3D surveillance radar

Revati 3D surveillance radar

The Revathi is a 3D radar operating in the S-band. It is a multi-role radar and is used for both surface and air search up to a distance of 200 km. It is designated as the Central Acquisition radar (CAR) as it is used to acquire aerial and surface targets before the fire control radar can direct the gunfire towards them. It will also act as a target acquisition radar for the VL-Mica surface to air missiles which will be fitted in the future. This missile doesn’t need a fire control radar as it has an active radar seeker in its nose which finds and locks onto targets on its own. Source

TMX/EO Mk2 – Fire Control Radar

TMX/EO Mk2 – Fire Control Radar

The TMX/EO Mk2 can track air, surface and fixed ground targets with extreme precision. The size of the entire radar is reduced to a single unit located behind the antenna. It is available with either X-band or Ku-band radar and a scalable electro-optical sensor fit (including IR camera, TV camera and laser rangefinder). By means of a third axis between the lateral and elevation axes, the TMX/EO Mk2 is able to track steeply attacking targets, even in very rough seas.

TMEO Mk2 – Electro-Optical Tracking Module Mk2

TMEO Mk2 – Electro-Optical Tracking Module Mk2
(Picture: Rheinmetall)

The TMEO Mk2 is a modern, powerful and flexible tracking system intended for integration within a wide-range of naval fire control systems. Designed with a scalable architecture, the TMEO Mk2 can be employed in a wide variety of tactical roles, and optimised to meet specific functional requirements. The high quality TMEO Mk2 tracking data can be typically used for weapon control, as a 3-D designation source, and for internal data processing. The TMEO Mk2 will carry out the following primary operation functions, using both active and passive electro-optical sensors: anti air engagements, surface engagements and surveillance operations. Source

The countermeasures against various incoming missiles are provided by Kavach naval decoy system. The Electronic Warfare System (EWS) fitted on the vessel further enhances the survivability.

Helicopter landing facilities

The stern landing deck can support the operation of a single helicopter. The Kamorta Class corvettes are the first Indian Navy ships to be equipped with rail-less helo traversing system and foldable hangar door.


The Kamorta Class is powered by a combined diesel and diesel (CODAD) propulsion system integrating four 3,888kW main diesel engines, two controllable pitch propellers and noise-suppressing raft-mounted gearbox.

The shipboard power is provided by four diesel generators supplied by Wartsila. The Kirloskar Engines, the licensee of SEMT PIELSTICK of France, delivers the engines, while raft-mounted gearboxes are supplied by DCNS.

The propulsion system provides a maximum speed of 25kt and range of about 3,450nmi at 18kt speed.


Note: I omitted the missiles as the post did not indicate that the Philippines built ship is equipped with missile at this point.

kamorta 3Kamorta Class : Analysis of India’s Deadly Anti-Submarine Corvette | Defencyclopedia
General characteristics
Class and type: Kamorta-class ASW corvette
Displacement: 3,500 tonnes.
Length: 109.1 m
Beam: 13.7 m
Propulsion: ·4 × Pielstick 12 PA6 STC Diesel engines

·CODAD, DCNS raft mounted gearbox

Speed: 32 knots (59 km/h; 37 mph)
Complement: 13 Officers and 180 Sailors
Sensors and
processing systems:
·Revati Central Acquisition Radar

·EL/M-2221 STGR fire-control radar

·BEL Shikari

·BEL RAWL02 (Signaal LW08) antenna communication grid – Gigabit Ethernet-based integrated ship borne data network, with a fiber optic cable backbone running through the vessel

·HUMSA (Hull Mounted Sonar Array)

·Bomber Electronic warfare (EW) suites – BEL Ajanta

Electronic warfare
& decoys:



Armament: ·1 × 76.2 mm Oto SRGM

·2 × AK-630M CIWS

·2 × RBU-6000 (IRL) anti-submarine rocket launcher

·4 x 533 mm Torpedo tubes

Aircraft carried: 1 Westland Sea King Mk.42B




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