|Preceded by:||Brahmaputra class|
|Succeeded by:||Shivalik class|
|Cost:||₹175 billion (US$2.6 billion)|
|Type:||Guided Missile Frigate|
4,035 t (4,448 short tons) full load 3,850 t (4,240 short tons) standard load 
|Length:||124.8 m (409 ft 5 in)|
|Beam:||15.2 m (49 ft 10 in)|
|Draught:||4.2 m (13 ft 9 in)|
|Speed:||32 knots (59 km/h; 37 mph)|
|Complement:||180 (18 officers)|
|Aircraft carried:||1 Ka-28, Ka-31 or Dhruv helicopter|
The Talwar class are a class of guided missile frigates designed and built by Russia for the Indian Navy. The Talwar-class guided missile frigates, also known as Project 1135.6, are modified Krivak III-class frigates from Russia. The design has been further developed as the Admiral Grigorovich-class frigate for the Russian Navy. The Talwar class has a displacement of 4,000 tons and speed of 30 knots (56 km/h; 35 mph) and is capable of accomplishing a wide variety of missions, primarily, finding and eliminating enemy submarines and large surface ships.
Due to the use of stealth technologies and a special hull design, the resulting frigate features reduced radar cross section (RCS) as well as electromagnetic, acoustic and infrared signatures. Equipped with Russian-made sensors and weapon systems, the Talwar-class frigates are modern ships with balanced capabilities, capable of countering modern Western naval assets. The Talwar class is an Indo-Russian joint production. Ships of this class have quite a few systems of Indian origin and manufacture, including their anti-submarine sensor (sonar) suite and complete communication equipment. Indian Navy currently has six of these ships & plans to induct four more of this class.
- 1 History
- 2 Design and description
- 3 Armament
- 4 Electronics and sensors
- 5 Recent developments
- 6 Ships of the class
- 7 References
- 8 External links
On 17 November 1997, Russia and India signed a $1 billion contract, for three Krivak III-class multi-purpose frigates. The Indian Navy wanted to fill the gap created by the decommissioning of the Leander-class frigates until the Project 17-class frigates entered service.
After the signing of the contract, Severnoye Design Bureau began a detail design layout and the shipbuilder, Baltisky Zavod of St. Petersburg, began preparations for their construction. The project involved around 130 suppliers from Russia, India, Britain, Germany, Denmark, Belarus, Ukraine and other countries including over 30 St. Petersburg-based naval design organizations and institutes.
The first frigate, INS Talwar was delivered in May 2002. The second, INS Trishul, was delivered in November 2002 and the third, INS Tabar, in May 2003. The Russian firm delayed the delivery of three frigates by 13 months, 7 months and 11 months respectively. The contract stipulated the levy of liquidated damages for the delays and the same worked out to the equivalent of US$38.5 million. This was yet to be recovered as of December 2005.
The Indian government signed a follow-on contract for the purchase of three additional frigates on 14 July 2006. These ships will be built at Yantar Shipyard in Kaliningrad. The first frigate was scheduled for delivery in April 2011. These ships will feature BrahMos supersonic anti-ship cruise missile instead of the Klub-N/3M54TE missile system which was provided to the Talwar, Trishul and Tabar frigates.
In July 2012 India Today announced the start of talks about purchasing three additional Talwar-class frigates (No.7 to No.9). In March 2016, it was reported that India and Russia are still negotiating the purchase of the additional ships.
Design and description
The Severnoye Design Bureau developed the Project 1135.6 vessel using an earlier Project 1135.1 design, which dated back to the early 1980s. The ship's redesigned topside and hull has a considerably reduced radar cross-section. While the superstructure sides are sloped and relatively clean, the very cluttered topside of the ship cannot be remotely described as having any signature reducing features. These frigates will be the first Indian Navy warships to incorporate some stealth features. The ship's hull is characterized by outward flare and tumblehome, while the superstructure (which forms a continuous junction with the hull) has a large fixed tumblehome angle.
The Talwars features the Zorya designed and Mashproekt (Ukraine) manufactured M7N.1E gas turbine plant which comprises two DS-71 cruise turbines and two DT-59 boost turbines in two engine rooms. The cruising component consists of two DS-71 gas-turbine engines, each rated at 9,000 horsepower (6,700 kW) in forward running, and 1,500 hp (1,100 kW) in reverse. Two cruising RO63 two-speed gearboxes and one cruising R1063 auxiliary gearbox which makes it possible to use any of the cruising engines to drive both propeller shafts. A boost component with two DT-59.1 gas-turbine engines, each rated at 19,500 hp (14,500 kW) forward running, 4,500 hp (3,400 kW) in reverse and two RO58 single-speed reduction gearboxes. The four gas turbines are mounted on isolated cradles which minimize their contact with the hull and thereby considerably reduce the transmission of her vibration and sound.
Electrical power is provided by four 1 MW Wärtsilä WCM-1000 generator sets with Cummins KTA50G3 engines and Kirloskar 1 MV AC generators. The contract for the generators was signed with Wärtsilä Denmark.
The Talwar class can accommodate one Ka-28 Helix-A antisubmarine helicopter or one Ka-31 Helix-B airborne early warning helicopter which can provide over-the-horizon targeting. The vessel can also embark the navalised variant of the indigenous HAL Dhruv.
The frigates are armed with a new 3M-54 Klub attack anti-ship system with a vertical missile launcher, Shtil-1 multi-channel medium-range surface-to-air missile system (an export version of the SA-N-12 "Grizzly"), a Kashtan anti-aircraft missile and artillery system, a RBU-6000 depth charge launcher and Puma-Universal artillery system. These ships are designed to carry and operate one heavy duty helicopter.
In the main strike role, an eight-cell 3S14E vertical missile launcher is fitted, which accommodates the 3M-54E Klub-N anti-ship missile developed by the Novator Design Bureau. The Agat Research and Production Enterprise has supplied the 3R14N-11356 shipborne fire-control system associated with the Klub-N. The 3M-54E Klub is an 8.22 metres (27.0 ft) long missile using active radar guidance with a range of 220 kilometres (140 mi). It is a three-stage missile in which the terminal stage reaches supersonic velocity (Mach 2.9) when it is approximately 20 km (12 mi) from its target.
The follow-on order of INS Teg, Tarkash and Trikand are fitted with the BrahMos supersonic cruise missile, which has a range of 300 kilometres (190 mi) and moves with the velocity of Mach 3 throughout its flight.
The Shtil-1 SAM system with a 3S-90 missile launcher is fitted forward of the bridge and is armed with the 9M317 (SA-N-12 "Grizzly", navalised SA-17) missile. 24 missiles are carried in a magazine located below deck. Guidance and target illumination for these missiles is provided by four MR-90 Orekh (NATO: Front Dome) radars, which are connected to a command and control post. The SA-N-12 missile uses a combination of inertial guidance and semi-active radar homing to its maximum range of 45 km (28 mi). The 70 kg (150 lb) blast-fragmentation warhead is triggered by a radar proximity fuze. The missile's control system and warhead can be adjusted to a specific target following target recognition, which increases hit probability. Eight Igla-1E (SA-16) portable air defence missiles are also carried.
Close-in weapon system (CIWS)
For the CIWS role, two Kashtan air defence gun and missile systems are used. Each system consists of two GSh-30k (AO-18K) six-barreled 30 mm Gatling guns, fed by a link-less mechanism, and two SA-N-11 (navalised variant of the 9M311, SA-19) SAM clusters. The system also includes a storing and reloading system to keep 32 SAMs in container-launchers in the vessel's under-deck spaces. The follow-on order ships Teg, Tarkash and Trikand were fitted with the AK-630 system, replacing the Kashtan system in the earlier ships.
One 100 mm A-190(E) gun is fitted forward for use against ship and shore based targets The A-190(E) uses a lightweight gun mount with an automatic gun and fuze setter. Fire control is provided by the 5P-10E Puma FCS. The gun can fire 60 rounds a minute out to a range of 8.2 nautical miles (15.2 km). The weight of each shell is 16 kilograms (35 lb).
The gun features higher automation of fire preparation and control and employs advanced guided and rocket-assisted long-range and enhanced-lethality projectiles fitted with dual-mode impact/proximity fuzes. Together with the use of the muzzle velocity meter, it is designed to produce increased combat capability. In addition, the gun turret features stealth technology to minimize the radar signature of a ship.
The ships carry the RPK-8 system, which uses a 12 barreled RBU-6000 ASW rocket launcher to fire the 212 mm 90R anti-submarine rocket or RGB-60 depth charges. The firing range is from 600 to 4,300 metres (2,000 to 14,100 ft), and the depth of engagement is up to 1,000 metres (3,300 ft).
Two twin 533 mm DTA-53-11356 fixed torpedo tube launchers are fitted amidships and fire the SET-65E/53-65KE torpedoes. The Purga anti-submarine fire-control system provides control for both the RBU-6000 and DTA-53 launchers.
Electronics and sensors
- Surface search: One 3Ts-25E Garpun-B radar at I-band frequency, using both active and passive channels, provides long-range surface target designation. One MR-212/201-1 radar at I-band frequency is used for navigation and a separate Kelvin Hughes Nucleus-2 6000A radar set is used for short-range navigation and surface surveillance. Also fitted with a Ladoga-ME-11356 inertial navigation and stabilisation suite supplied by Elektropribor.
- Air/surface search: One Fregat M2EM (NATO: Top Plate) 3D circular scan radar at E-band frequency, provides target indication to the Shtil-1 missile system. Featuring continuous electronically scanned arrays, the radar rotates at 12 or 6 rpm and has an instrumented range to 300 km.
- Fire control: Features a Ratep JSC 5P-10E Puma fire control system, consisting of a phased array and target tracking radar along with laser and TV devices. The system, fitted above the bridge deck, features in-flight course correction updates via data links, has a maximum detection range of 60 km, operates autonomously and is capable of automatically locking on to four targets and tracking them.
According to some reports, the APSOH (Advanced Panoramic Sonar Hull) hull-mounted sonar is fitted on the vessels. The APSOH sonar performs active ranging, passive listening, auto tracking of targets and classification. Other reports indicate that the BEL HUMSA (Hull Mounted Sonar Array) sonar is fitted. The HUMSA is a panoramic medium-range active/passive sonar system developed by the Naval Physical and Oceanographic Laboratory (NPOL). As a stop gap measure, Russian Bronza (MG-345) hull mounted sonars are installed.
Information released from the Severnoye Design Bureau (SDB) indicate that French towed array sonars (TAS) are also fitted. This is very plausible given that many Indian Navy ships now use French TAS, however INS Talwar shows no signs of such a system. The vessel may also have a Russian SSN-137 Variable Depth Sonar (VDS) with NATO reporting name Steer Hide, providing active search with medium frequency, and the sonar might be license produced in India with Indian designation SSSN-113.
The frigate features the Russian-made TK-25E-5 integrated electronic warfare suite, which comprises a wideband electronic support measures system that has antenna arrays mounted in the superstructure and a multimode jammer. Four KT-216 decoy launchers, forming part of the PK-10 system, are fitted for soft-kill defence. A total of 120 120mm chaff and infrared decoy rounds are carried on board.
Combat data system
- The Trebovaniye-M combat information and control platform is a fully distributed combat management system. It controls all platforms of attack and defence weapons, independently generates combat missions based on situation analysis, determines optimal number of missile firings, displays information on the state of ship-borne weaponry and transmits data to protection systems.
- Interconnected via an Ethernet LAN, Trebovaniye-M features eight T-171 full-colour operator workstations (with 18-inch colour flat panel displays) and three central T-162 servers. Individual items of combat system equipment interface to Trebovaniye-M via T-119 and T-190 bus interface units. Raw radar data is received through a T-181 data reception unit.
India and Russia are negotiating for building an additional 4 more Talwar frigates for the Indian Navy. In September 2016, it was reported that India would acquire two Admiral Grigorovich class-frigates from Russia and remaining two will be built in India.These frigates are based on the Talwar class and were to be commissioned into the Russian Navy, but after the Ukrainian Conflict Ukraine refused to supply any more engines for the Russian ships. So far, only two of the six have been commissioned by Russia 
Ships of the class
|INS Talwar (F40)||Baltiysky Zavod||Mumbai||12 May 2000||18 June 2003||Active|
|INS Trishul (F43)||Baltiysky Zavod||Mumbai||24 November 2000||25 June 2003||Active|
|INS Tabar (F44)||Baltiysky Zavod||Mumbai||25 May 2001||19 April 2004||Active|
|INS Teg (F45)||Yantar||Mumbai||27 November 2009||27 April 2012||Active|
|INS Tarkash (F50)||Yantar||Mumbai||23 June 2010||9 November 2012||Active|
|INS Trikand (F51)||Yantar||Mumbai||25 May 2011||29 June 2013||Active|
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- "Launch of sixth Project 11356 Talwar Class frigate for Indian Navy". Marine Propulsion. 26 May 2011. Retrieved 19 December 2013.
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- "India, Russia likely to sign deal for 4 stealth frigates". The Hindu. 2015-12-22. ISSN 0971-751X. Retrieved 2015-12-22.
- "India, Russia discuss $4bn deal for 4 stealth frigates – Times of India". Retrieved 2016-09-08.
- "India gives names to 3 frigates built by Russia". En.rian.ru. Retrieved 2011-02-01.
- "Russia to Deliver INS Teg on April 27". navaltoday.com. 2 April 2012. Retrieved 26 September 2014.
- "Russia floats out 2nd frigate for Indian Navy". En.rian.ru. 2010-06-23. Retrieved 2011-02-01.
- "Indian Navy to Take Over INS Tarkash in November". navaltoday.com. 3 October 2012. Retrieved 26 September 2014.
- "Yantar shipyard prepared third Indian frigate for launch". www.rusnavy.com. 19 May 2011. Retrieved 26 September 2014.
- "Delivery of stealth frigates from Russia delayed: Antony". MSN News. 25 August 2011. Retrieved 26 September 2014.
- "Russian shipyard to deliver third frigate to India". english.people.cn. 26 June 2013. Retrieved 26 September 2014.
- Talwar Class – Bharat Rakshak
- Modified Krivak III Class – Bharat Rakshak
- Talwar Class – Global Security
- (English) All Talwar Class Frigates – Complete Ship List