Nilgiri-class frigate (2019)

	INS Nilgiri; first ship of the class
Class overview
Name	Nilgiri class
Builders	Garden Reach Shipbuilders & Engineers (GRSE); Mazagon Dock Limited (MDL);
Operators	Indian Navy
Preceded by	Shivalik class
Succeeded by	Project 17B class
Cost	₹4,000 crore (equivalent to ₹47 billion or US$540 million in 2023) per frigate (Estimated); ₹45,000 crore (equivalent to ₹530 billion or US$6.1 billion in 2023) (Total deal);
Built	2017–present
In commission	2025-present
Planned	7
Building	6
Completed	1
Active	1
General characteristics
Type	Guided-missile frigate
Displacement	6,670 t (6,560 long tons)
Length	149 m (488 ft 10 in)
Beam	17.8 m (58 ft 5 in)
Draft	5.22 m (17 ft 2 in)
Depth	9.9 m (32 ft 6 in)
Installed power	2 × General Electric LM2500+ (30,200 kW each); 2 × MAN Diesel 12V28/33D STC (6,000 kW each);
Propulsion	CODAG
Speed	32 kn (59 km/h)
Range	2,500 nmi (4,600 km) at 28 kn (52 km/h); 5,500 nmi (10,200 km) at 16–18 kn (30–33 km/h);
Boats & landing ; craft carried	2 × RHIB
Complement	226 (35 officers + 191 sailors)
Sensors and ; processing systems	Radar :-; IAI EL/M-2248 MF-STAR S-Band AESA radar; Indra (TASL) Lanza-N L-band air surveillance radar; Sonar :-; BEL HUMSA-NG active/passive sonar; Combat Suite :-; "Combat Management System" (CMS-17A);
Electronic warfare ; & decoys	DRDO "Shakti" EW suite (equipped with ESM/ECM and "Radar Finger Printing System" (RFPS)); Decoys :-; 4 × Kavach decoy launchers; 2 × NSTL Maareech torpedo-countermeasure systems;
Armament	Anti-air warfare :-; 4 × 8-cell VLS, for 32 Barak 8 surface-to-air missiles; Anti-surface warfare :-; 1 × 8-cell VLS, for 8 BrahMos anti-ship missiles; Anti-submarine warfare :-; 2 × triple-tube torpedo launchers for Varunastra (torpedo)/Torpedo Advanced Light Shyena; 2 × RBU-6000 anti-submarine rocket launchers (72 rockets); Guns :-; 1 × OTO Melara 76 mm naval gun; 2 × AK-630M CIWS; 2 × OFT 12.7 mm M2 Stabilized Remote Controlled Gun;
Aircraft carried	1 × HAL Dhruv (or) Sea King Mk. 42B helicopters
Aviation facilities	Enclosed helicopter hangar capable of accommodating one multi-role helicopters.
Notes	First major class of Indian-designed warships to be built using integrated modular construction.

The Nilgiri-class frigates, formally classified as the Project-17 Alpha frigates (P-17A), are a series of stealth guided-missile frigates currently being built by Mazagon Dock Shipbuilders (MDL) and Garden Reach Shipbuilders & Engineers (GRSE) for the Indian Navy (IN).^[7]^[8]

Designed by the Warship Design Bureau, the class is intended to serve as a complement to the currently-serving Shivalik-class frigates (P-17) with improved design portfolios, such as low radar cross-section (RCS) and reduced infrared signature.^[9]^[10]

With a total of seven vessels, the construction of the frigates are currently divided between MDL and GRSE.^[7]^[8] As of 2024, all seven frigates have been launched and are intended to enter service with the IN between 2024 and 2027.^[11] The frigates will form a part of the Eastern Fleet as well as the future Carrier Battle Group (CBG) of INS Vikrant.^[12]

Upon entering service, the class is to be complemented by an additional series of seven or eight frigates, under the codename the Project-17B series.^[13]^[14]

^ "Keel laid for the third Project 17 stealth frigate". indiastrategic.in. September 2020.
^ "Navy seals 45,000-cr deal: seven warships". The Indian Express. 20 June 2009. Archived from the original on 15 January 2011. Retrieved 21 February 2015.
^ "Nilgiri-Class (Project 17A) Guided-Missile Frigates, India". Naval-technology.com.
^ "Prime Minister to Formally Handover DRDO Designed and Developed Advanced Electronic Warfare Suite 'Shakti' for Indian Naval Ships to Chief of Naval Staff". Press Information Bureau. Ministry of Defence, Government of India. 18 November 2021. Retrieved 14 February 2025.
^ "Navy to induct cutting-edge stealth ships to bolster combat readiness". India Today. 20 February 2025. Retrieved 26 February 2025.
^ "Indian Project 17A frigate programme moves forward". shephardmedia.com. 3 October 2019.
^ ^a ^b "Mazagon Dock Shipbuilders Limited – Products – Naval Ships". mazagondock.in.
^ ^a ^b "Garden Reach Shipbuilders & Engineers Ltd. – Product Profile – Frigate". grse.in.
^ "LAUNCH OF Y3024 (VINDHYAGIRI) ON 17 AUGUST 2023". pib.gov.in. 13 August 2023.
^ Sengupta, Prasan K. (September 2012). "CCNS finally kickstarts Indian Navy's Project 17A". ForceIndia.com. Archived from the original on 18 February 2015. Retrieved 21 February 2015.
^ Mohanan, Kalesh (April–June 2012). "Indigenous Warship Building". Indian Defence Review. Vol. 27, no. 2.
^ Bhattacharjee, Sumit (4 December 2021). "Eastern Fleet will have Carrier Battle Group: Vice Admiral". The Hindu.
^ Pubby, Manu (18 July 2024). "Mazagon, Garden Reach Shipbuilders lead race for Defence Ministry's ₹70,000 crore warships order". The Economic Times. ISSN 0013-0389. Retrieved 26 August 2024.
^ Menon, Adithya Krishna (13 August 2023). "India Proceeds with New Submarines, Surface Ships Development". Naval News. Retrieved 26 August 2024.

[1] "Keel laid for the third Project 17 stealth frigate". indiastrategic.in. September 2020.

[iex-2] "Navy seals 45,000-cr deal: seven warships". The Indian Express. 20 June 2009. Archived from the original on 15 January 2011. Retrieved 21 February 2015.

[3] "Nilgiri-Class (Project 17A) Guided-Missile Frigates, India". Naval-technology.com.

[4] "Prime Minister to Formally Handover DRDO Designed and Developed Advanced Electronic Warfare Suite 'Shakti' for Indian Naval Ships to Chief of Naval Staff". Press Information Bureau. Ministry of Defence, Government of India. 18 November 2021. Retrieved 14 February 2025.

[5] "Navy to induct cutting-edge stealth ships to bolster combat readiness". India Today. 20 February 2025. Retrieved 26 February 2025.

[6] "Indian Project 17A frigate programme moves forward". shephardmedia.com. 3 October 2019.

[MDL-7] "Mazagon Dock Shipbuilders Limited – Products – Naval Ships". mazagondock.in.

[GRSE-8] "Garden Reach Shipbuilders & Engineers Ltd. – Product Profile – Frigate". grse.in.

[9] "LAUNCH OF Y3024 (VINDHYAGIRI) ON 17 AUGUST 2023". pib.gov.in. 13 August 2023.

[ForceIndia.com-10] Sengupta, Prasan K. (September 2012). "CCNS finally kickstarts Indian Navy's Project 17A". ForceIndia.com. Archived from the original on 18 February 2015. Retrieved 21 February 2015.

[11] Mohanan, Kalesh (April–June 2012). "Indigenous Warship Building". Indian Defence Review. Vol. 27, no. 2.

[delh-rebase-12] Bhattacharjee, Sumit (4 December 2021). "Eastern Fleet will have Carrier Battle Group: Vice Admiral". The Hindu.

[P-17B-13] Pubby, Manu (18 July 2024). "Mazagon, Garden Reach Shipbuilders lead race for Defence Ministry's ₹70,000 crore warships order". The Economic Times. ISSN 0013-0389. Retrieved 26 August 2024.

[Follow-14] Menon, Adithya Krishna (13 August 2023). "India Proceeds with New Submarines, Surface Ships Development". Naval News. Retrieved 26 August 2024.

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Class overview
INS Nilgiri; first ship of the class
Name	Nilgiri class
Builders	Garden Reach Shipbuilders & Engineers (GRSE) Mazagon Dock Limited (MDL)
Operators	Indian Navy
Preceded by	Shivalik class
Succeeded by	Project 17B class
Cost	₹4,000 crore (equivalent to ₹47 billion or US$540 million in 2023) per frigate (Estimated)^[1] ₹45,000 crore (equivalent to ₹530 billion or US$6.1 billion in 2023) (Total deal)^[2]
Built	2017–present
In commission	2025-present
Planned	7
Building	6
Completed	1
Active	1
General characteristics
Type	Guided-missile frigate
Displacement	6,670 t (6,560 long tons)
Length	149 m (488 ft 10 in)
Beam	17.8 m (58 ft 5 in)
Draft	5.22 m (17 ft 2 in)
Depth	9.9 m (32 ft 6 in)
Installed power	2 × General Electric LM2500+ (30,200 kW each) 2 × MAN Diesel 12V28/33D STC (6,000 kW each)
Propulsion	CODAG^[3]
Speed	32 kn (59 km/h)
Range	2,500 nmi (4,600 km) at 28 kn (52 km/h) 5,500 nmi (10,200 km) at 16–18 kn (30–33 km/h)
Boats & landing craft carried	2 × RHIB
Complement	226 (35 officers + 191 sailors)
Sensors and processing systems	Radar :- IAI EL/M-2248 MF-STAR S-Band AESA radar Indra (TASL) Lanza-N L-band air surveillance radar Sonar :- BEL HUMSA-NG active/passive sonar Combat Suite :- "Combat Management System" (CMS-17A)
Electronic warfare & decoys	DRDO "Shakti" EW suite^[4] (equipped with ESM/ECM and "Radar Finger Printing System" (RFPS)) Decoys :- 4 × Kavach decoy launchers 2 × NSTL Maareech torpedo-countermeasure systems
Armament	Anti-air warfare :- 4 × 8-cell VLS, for 32 Barak 8 surface-to-air missiles Anti-surface warfare :- 1 × 8-cell VLS, for 8 BrahMos anti-ship missiles Anti-submarine warfare :- 2 × triple-tube torpedo launchers for Varunastra (torpedo)^[5]/Torpedo Advanced Light Shyena 2 × RBU-6000 anti-submarine rocket launchers (72 rockets) Guns :- 1 × OTO Melara 76 mm naval gun 2 × AK-630M CIWS 2 × OFT 12.7 mm M2 Stabilized Remote Controlled Gun
Aircraft carried	1 × HAL Dhruv (or) Sea King Mk. 42B helicopters
Aviation facilities	Enclosed helicopter hangar capable of accommodating one multi-role helicopters.
Notes	First major class of Indian-designed warships to be built using integrated modular construction.^[6]

Nilgiri-class frigate (2019)

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