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{{Short description|Indian stealth guided-missile frigates}} | {{Short description|Indian stealth guided-missile frigates}} | ||
{{hatnote|Not to be confused with the [[Nilgiri-class frigate (1972)|Nilgiri-class frigates]] – a class of specifically modified-[[Leander-class frigate]]s which served in the Indian Navy from 1972 to 2013.}} | {{hatnote|Not to be confused with the [[Nilgiri-class frigate (1972)|Nilgiri-class frigates]] – a class of specifically modified-[[Leander-class frigate]]s which served in the Indian Navy from 1972 to 2013.}} | ||
{{EngvarB|date=March | {{EngvarB|date=March 2014}} | ||
{{Use dmy dates|date=July 2022}} | {{Use dmy dates|date=July 2022}} | ||
{|{{Infobox ship begin}} | {|{{Infobox ship begin}} | ||
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| Class before = {{sclass|Shivalik|frigate|4}} | | Class before = {{sclass|Shivalik|frigate|4}} | ||
| Subclasses = | | Subclasses = | ||
| Cost = *{{INRConvert|4000|c|year=2020|lk=on}} per frigate (Estimated)<ref>{{Cite web|url=https://www.indiastrategic.in/keel-laid-for-the-third-project-17-stealth-frigate/|title=Keel laid for the third Project 17 stealth frigate|website=indiastrategic.in|date=September | | Cost = *{{INRConvert|4000|c|year=2020|lk=on}} per frigate (Estimated)<ref>{{Cite web|url=https://www.indiastrategic.in/keel-laid-for-the-third-project-17-stealth-frigate/|title=Keel laid for the third Project 17 stealth frigate|website=indiastrategic.in|date=September 2020}}</ref> | ||
*{{INRConvert|45000|c|year= | *{{INRConvert|45000|c|year=2020}} (Total deal)<ref name=iex>{{cite web |url=http://www.indianexpress.com/news/Navy-seals-45-000-cr-deal--seven-warships/479132 |title=Navy seals 45,000-cr deal: seven warships |work=The Indian Express |date=20 June 2009 |access-date=21 February 2015 |url-status=live |archive-url=https://web.archive.org/web/20110115032307/http://www.indianexpress.com/news/Navy-seals-45-000-cr-deal--seven-warships/479132 |archive-date=15 January 2011 }}</ref> | ||
| Built range = | | Built range = | ||
| In service range = | | In service range = | ||
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| Ship aircraft = 2 × [[HAL Dhruv]] (or) [[Westland Sea King|Sea King Mk. 42B]] helicopters | | Ship aircraft = 2 × [[HAL Dhruv]] (or) [[Westland Sea King|Sea King Mk. 42B]] helicopters | ||
| Ship aircraft facilities = Enclosed helicopter [[hangar]] capable of accommodating two multi-role helicopters. | | Ship aircraft facilities = Enclosed helicopter [[hangar]] capable of accommodating two multi-role helicopters. | ||
| Ship notes = First major class of Indian-designed warships to be built using [[Modular building|integrated modular construction]].<ref>{{Cite web|url=https://www.shephardmedia.com/news/naval-warfare/indian-project-17a-frigate-programme-moves-forward/|title=Indian Project 17A frigate programme moves forward|website=shephardmedia.com|date=3 October | | Ship notes = First major class of Indian-designed warships to be built using [[Modular building|integrated modular construction]].<ref>{{Cite web|url=https://www.shephardmedia.com/news/naval-warfare/indian-project-17a-frigate-programme-moves-forward/|title=Indian Project 17A frigate programme moves forward|website=shephardmedia.com|date=3 October 2019}}</ref> | ||
}} | }} | ||
|} | |} | ||
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===Development=== | ===Development=== | ||
[[File:P17A design 1.png|thumb|left|An animated depiction of the ''Nilgiri''-class frigate, showing its [[Port and starboard|starboard]].]] | [[File:P17A design 1.png|thumb|left|An animated depiction of the ''Nilgiri''-class frigate, showing its [[Port and starboard|starboard]].]] | ||
The [[frigate]]s were designed by the Warship Design Bureau ( formerly Directorate of Naval Design ) – an internal establishment within the [[Indian Navy]] responsible for designing [[warship]]s; the organisation is also distinguished for having contributed to the designing of numerous Indian warships, including {{INS|Vikrant|2013|6}} – India's first indigenously-designed [[aircraft carrier]], the {{sclass|Arihant|submarine|1}}s – India's first indigenously-designed [[Ballistic missile submarine|nuclear-powered ballistic missile submarines]] and the {{sclass|Shivalik|frigate|1}}s – India's first indigenously designed frigates equipped with [[stealth technology]].<ref>{{Cite web|url=https://www.naval-technology.com/projects/project-17-a-nilgiri-class-frigates/|title=Project 17-A Nilgiri-Class Frigates|website=naval-technology.com|date=10 October | The [[frigate]]s were designed by the Warship Design Bureau ( formerly Directorate of Naval Design ) – an internal establishment within the [[Indian Navy]] responsible for designing [[warship]]s; the organisation is also distinguished for having contributed to the designing of numerous Indian warships, including {{INS|Vikrant|2013|6}} – India's first indigenously-designed [[aircraft carrier]], the {{sclass|Arihant|submarine|1}}s – India's first indigenously-designed [[Ballistic missile submarine|nuclear-powered ballistic missile submarines]] and the {{sclass|Shivalik|frigate|1}}s – India's first indigenously designed frigates equipped with [[stealth technology]].<ref>{{Cite web|url=https://www.naval-technology.com/projects/project-17-a-nilgiri-class-frigates/|title=Project 17-A Nilgiri-Class Frigates|website=naval-technology.com|date=10 October 2019}}</ref> | ||
The class' design was finalised by the DND in 2013; it was later unveiled to the public in April 2018 – when MDL displayed a scale model of the frigate at the "DEXEXPO 2018" defense exhibition, held at [[Chennai]], [[Tamil Nadu]], India.<ref>{{Cite web|url=https://www.c4defence.com/en/p-17a-frigate-unveiled/|title=P-17A Frigate Unveiled|website=c4defence.com|date=26 April | The class' design was finalised by the DND in 2013; it was later unveiled to the public in April 2018 – when MDL displayed a scale model of the frigate at the "DEXEXPO 2018" defense exhibition, held at [[Chennai]], [[Tamil Nadu]], India.<ref>{{Cite web|url=https://www.c4defence.com/en/p-17a-frigate-unveiled/|title=P-17A Frigate Unveiled|website=c4defence.com|date=26 April 2018}}</ref> | ||
=== Features === | === Features === | ||
====Stealth==== | ====Stealth==== | ||
The frigate's design incorporates a significant degree of stealth and low radar-observability – through the utility of composite materials, radar-absorbent coatings and low-observable/radar-transparent technologies; the usage of the aforementioned materials assists the vessel in maintaining a low [[radar cross-section]] (RCS).<ref>{{Cite web|url=https://www.asiapacificdefensejournal.com/2020/12/indias-second-project-p17a-nilgiri.html|title=India's second Project P17A Nilgiri-class guided missile frigate launched|website=asiapacificdefensejournal.com|date=31 December | The frigate's design incorporates a significant degree of stealth and low radar-observability – through the utility of composite materials, radar-absorbent coatings and low-observable/radar-transparent technologies; the usage of the aforementioned materials assists the vessel in maintaining a low [[radar cross-section]] (RCS).<ref>{{Cite web|url=https://www.asiapacificdefensejournal.com/2020/12/indias-second-project-p17a-nilgiri.html|title=India's second Project P17A Nilgiri-class guided missile frigate launched|website=asiapacificdefensejournal.com|date=31 December 2020}}</ref> | ||
The vessel's physical profile also features a substantial level of stealth through the application of different physical forms – including an enclosed [[Mooring|mooring deck]], [[flush deck]]-mounted weapon systems and a reduced number of antennae.<ref>{{Cite web|url=https://www.freepressjournal.in/india/ins-himgiri-indian-navys-advanced-p17a-class-stealth-frigate-launched-at-grse-yard-heres-all-you-need-to-know|title=INS 'Himgiri', Indian Navy's advanced P17A-class stealth frigate, launched at GRSE yard – here's all you need to know|website=freepressjournal.com|date=14 December | The vessel's physical profile also features a substantial level of stealth through the application of different physical forms – including an enclosed [[Mooring|mooring deck]], [[flush deck]]-mounted weapon systems and a reduced number of antennae.<ref>{{Cite web|url=https://www.freepressjournal.in/india/ins-himgiri-indian-navys-advanced-p17a-class-stealth-frigate-launched-at-grse-yard-heres-all-you-need-to-know|title=INS 'Himgiri', Indian Navy's advanced P17A-class stealth frigate, launched at GRSE yard – here's all you need to know|website=freepressjournal.com|date=14 December 2020}}</ref> | ||
The frigate's [[infrared signature]], most specifically emissions from its propulsion exhaust and power generation machinery, are reduced through the application of [[Venturi effect]] and fluid injection, which helps to reduce the plume and hot metal temperatures of exhaust.<ref name="MDL P17A">{{Cite web|url=http://www.businessworld.in/article/MDL-Augmented-To-Build-11-Submarines-And-10-Ships-At-Any-Given-Time-RAdmiral-AK-Saxena-Director-Mazagon-Dock-/31-10-2020-337764/|title=MDL Augmented To Build 11 Submarines And 10 Ships at Any Given Time: R-Admiral AK Saxena, Director, Mazagon Dock|website=businessworld.com|date=31 October | The frigate's [[infrared signature]], most specifically emissions from its propulsion exhaust and power generation machinery, are reduced through the application of [[Venturi effect]] and fluid injection, which helps to reduce the plume and hot metal temperatures of exhaust.<ref name="MDL P17A">{{Cite web|url=http://www.businessworld.in/article/MDL-Augmented-To-Build-11-Submarines-And-10-Ships-At-Any-Given-Time-RAdmiral-AK-Saxena-Director-Mazagon-Dock-/31-10-2020-337764/|title=MDL Augmented To Build 11 Submarines And 10 Ships at Any Given Time: R-Admiral AK Saxena, Director, Mazagon Dock|website=businessworld.com|date=31 October 2020}}</ref> To maintain acoustic silence, the frigate is equipped with [[Propeller|propellers]] designed to have onset of cavitation at higher speeds to reduce hydrodynamic noise.<ref name="MDL P17A"/> In addition to the propellers, the vessel's hull also features special acoustic enclosures for some of the machinery to reduce the emission air-borne noise.<ref name="MDL P17A"/> | ||
====Modular profile==== | ====Modular profile==== | ||
The P-17A frigates are the first major class of Indian-designed warships to be built using the methodology of [[Modular building|integrated modular construction]] – a manufacturing process in which multiple modules (or "blocks") of a vessel's hull are pre-assembled/pre-outfitted independently, before being aggregated for final assembly.<ref>{{Cite web|url=https://www.defenseworld.net/news/28535/Indian_Navy___s_Project_17A_Stealth_Frigate_Launched#.YgUKu-pBzIU|title=Indian Navy’s Project 17A Stealth Frigate Launched|website=defenseworld.net|date=14 December | The P-17A frigates are the first major class of Indian-designed warships to be built using the methodology of [[Modular building|integrated modular construction]] – a manufacturing process in which multiple modules (or "blocks") of a vessel's hull are pre-assembled/pre-outfitted independently, before being aggregated for final assembly.<ref>{{Cite web|url=https://www.defenseworld.net/news/28535/Indian_Navy___s_Project_17A_Stealth_Frigate_Launched#.YgUKu-pBzIU|title=Indian Navy’s Project 17A Stealth Frigate Launched|website=defenseworld.net|date=14 December 2020}}</ref> | ||
In December 2015, MDL contracted [[Fincantieri S.p.A.]] to provide technical assistance and essential expertise in the construction of the seven frigates using the "modular construction" methodology.<ref>{{Cite web|url=https://www.fincantieri.com/en/media/press-releases/2015/000701/|title=Fincantieri To Collaborate with the Indian Shipyards MDL and GRSE for the Navy's Frigates|website=fincantieri.com|date=21 December | In December 2015, MDL contracted [[Fincantieri S.p.A.]] to provide technical assistance and essential expertise in the construction of the seven frigates using the "modular construction" methodology.<ref>{{Cite web|url=https://www.fincantieri.com/en/media/press-releases/2015/000701/|title=Fincantieri To Collaborate with the Indian Shipyards MDL and GRSE for the Navy's Frigates|website=fincantieri.com|date=21 December 2015}}</ref><ref>{{Cite web|url=https://www.defenseworld.net/news/15673/Mazagon_Dock_Teams_Up_With_Italian_Fincantieri_To_Build_Stealth_Frigates_For_Indian_Navy#.YgUzHepBzIU|title=Mazagon Dock Teams Up With Italian Fincantieri To Build Stealth Frigates For Indian Navy|website=defenseworld.net|date=24 March 2016}}</ref> | ||
=== Naming === | === Naming === | ||
The P-17A frigates were christened after the former-{{sclass|Nilgiri|frigate|1||1972}}s, which served in the Indian Navy between 1972 and 2013; the first six ships of the series were allotted the names utilised by the older class, namely – {{INS|Nilgiri|2019|2}}, {{INS|Himgiri|2020|2}}, ''Taragiri'', {{INS|Udaygiri|2022|2}}, ''Dunagiri'', and ''Vindhyagiri''.<ref>{{Cite web|url=https://www.theweek.in/wire-updates/national/2019/09/21/elx1-navy-frigate-name.html|title=Navy to name 7th frigate in P17A series as 'Mahendragiri'|website=theweek.in|date=4 April | The P-17A frigates were christened after the former-{{sclass|Nilgiri|frigate|1||1972}}s, which served in the Indian Navy between 1972 and 2013; the first six ships of the series were allotted the names utilised by the older class, namely – {{INS|Nilgiri|2019|2}}, {{INS|Himgiri|2020|2}}, ''Taragiri'', {{INS|Udaygiri|2022|2}}, ''Dunagiri'', and ''Vindhyagiri''.<ref>{{Cite web|url=https://www.theweek.in/wire-updates/national/2019/09/21/elx1-navy-frigate-name.html|title=Navy to name 7th frigate in P17A series as 'Mahendragiri'|website=theweek.in|date=4 April 2020}}</ref> The seventh and final vessel of the P-17A series, which did not have a namesake from the older class, was given the new name of ''Mahendragiri''.<ref>{{Cite web|url=https://economictimes.indiatimes.com/news/defence/indian-navy-to-name-7th-frigate-in-p17a-series-as-mahendragiri/articleshow/71235000.cms|title=Indian Navy to name 7th frigate in P17A series as 'Mahendragiri'|website=economictimes.indiatimes.com|date=23 September 2019}}</ref> | ||
== Instrumentation == | == Instrumentation == | ||
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====Anti-surface warfare==== | ====Anti-surface warfare==== | ||
[[File:P17A design 5.png|thumb|A depiction of the frigate's bow, showing its future armament.]] | [[File:P17A design 5.png|thumb|A depiction of the frigate's bow, showing its future armament.]] | ||
As part of its [[anti-surface warfare]] (ASuW) capabilities, the class features eight [[BrahMos]] [[Anti-ship missile|anti-ship cruise missiles]], capable of speeds of up to [[Mach number|Mach 3]].<ref>{{Cite web|url=https://www.business-standard.com/article/defence/indigenously-designed-brahmos-to-equip-talwar-class-frigates-118120100769_1.html|title='Indigenously designed' BrahMos to equip Talwar-class frigates|website=business-standard.com|date=1 December | As part of its [[anti-surface warfare]] (ASuW) capabilities, the class features eight [[BrahMos]] [[Anti-ship missile|anti-ship cruise missiles]], capable of speeds of up to [[Mach number|Mach 3]].<ref>{{Cite web|url=https://www.business-standard.com/article/defence/indigenously-designed-brahmos-to-equip-talwar-class-frigates-118120100769_1.html|title='Indigenously designed' BrahMos to equip Talwar-class frigates|website=business-standard.com|date=1 December 2018}}</ref> The BrahMos is widely regarded as one of the most formidable anti-ship missiles currently in service, given the missile's extreme versatility and manoeuvrability.<ref>{{Cite web|url=https://nationalinterest.org/feature/bull%E2%80%99s-eye-the-5-most-deadly-anti-ship-missiles-all-time-12411|title=Bullseye: The 5 Most Deadly Anti-Ship Missiles of All Time|website=nationalinterest.com|date=13 March 2015}}</ref> | ||
The vessels are equipped with one [[OTO Melara 76 mm]] [[Naval artillery|naval gun]]. Originally, the Indian Navy had planned to install the [[5"/54 caliber Mark 45 gun|Mk 45 {{cvt|127|mm|0}}]] naval gun, manufactured by [[BAE Systems Platforms & Services|BAE]]; however, this plan was later scrapped in 2021 on account of financial constraints.<ref>{{Cite web|url=https://theprint.in/defence/navy-to-scrap-plans-to-procure-guns-from-us-considering-make-in-india-route-now/706730/|title=Navy to scrap plans to procure guns from US, considering 'Make in India' route now|website=theprint.in|date=2 August 2021}}</ref> | The vessels are equipped with one [[OTO Melara 76 mm]] [[Naval artillery|naval gun]]. Originally, the Indian Navy had planned to install the [[5"/54 caliber Mark 45 gun|Mk 45 {{cvt|127|mm|0}}]] naval gun, manufactured by [[BAE Systems Platforms & Services|BAE]]; however, this plan was later scrapped in 2021 on account of financial constraints.<ref>{{Cite web|url=https://theprint.in/defence/navy-to-scrap-plans-to-procure-guns-from-us-considering-make-in-india-route-now/706730/|title=Navy to scrap plans to procure guns from US, considering 'Make in India' route now|website=theprint.in|date=2 August 2021}}</ref> | ||
====Anti-air warfare==== | ====Anti-air warfare==== | ||
As part of its anti-air warfare (AAW) capabilities, the class features thirty-two [[Barak 8]]ER [[surface-to-air missile]]s, with sixteen missiles present in four "2 x 4" VLS configurations – with two placed at the [[Bow (ship)|bow]] and two placed aft.<ref>{{Cite web|url=https://economictimes.indiatimes.com/news/defence/indo-israeli-barak-8-missile-indian-navy-to-test-long-range-sam-soon/articleshow/47478457.cms?from=mdr|title=Indo-Israeli Barak 8 missile: Indian Navy to test long-range SAM soon|website=economictimes.indiatimes.com|date=14 July | As part of its anti-air warfare (AAW) capabilities, the class features thirty-two [[Barak 8]]ER [[surface-to-air missile]]s, with sixteen missiles present in four "2 x 4" VLS configurations – with two placed at the [[Bow (ship)|bow]] and two placed aft.<ref>{{Cite web|url=https://economictimes.indiatimes.com/news/defence/indo-israeli-barak-8-missile-indian-navy-to-test-long-range-sam-soon/articleshow/47478457.cms?from=mdr|title=Indo-Israeli Barak 8 missile: Indian Navy to test long-range SAM soon|website=economictimes.indiatimes.com|date=14 July 2018}}</ref> | ||
The Barak 8ER, also classified as the LR-SAM, is an "extended-range" variant of the original Barak 8 – designed to neutralize various aerial threats, including fighter aircraft, helicopters, anti-ship missiles, cruise missiles, ballistic missiles and [[unmanned aerial vehicle]]s (UAV); the new variant is expected to feature a range of about {{cvt|150|km|mi}}.<ref>{{Cite web|url=https://www.indiatoday.in/education-today/gk-current-affairs/story/barak-8-missile-test-indian-navy-279676-2015-12-30|title=Indian Navy successfully tests Barak 8 interceptor missile: All you need to know|website=indiatoday.in|date=30 December | The Barak 8ER, also classified as the LR-SAM, is an "extended-range" variant of the original Barak 8 – designed to neutralize various aerial threats, including fighter aircraft, helicopters, anti-ship missiles, cruise missiles, ballistic missiles and [[unmanned aerial vehicle]]s (UAV); the new variant is expected to feature a range of about {{cvt|150|km|mi}}.<ref>{{Cite web|url=https://www.indiatoday.in/education-today/gk-current-affairs/story/barak-8-missile-test-indian-navy-279676-2015-12-30|title=Indian Navy successfully tests Barak 8 interceptor missile: All you need to know|website=indiatoday.in|date=30 December 2015}}</ref> | ||
====Anti-submarine warfare==== | ====Anti-submarine warfare==== | ||
As part of its [[anti-submarine warfare]] (ASW) capabilities, the class features two triple-tube lightweight [[Torpedo tube|torpedo launchers]] for firing ASW torpedoes. The class also features two [[RBU-6000]] (RPK-8) [[Anti-submarine weapon|anti-submarine rocket launchers]], capable of firing ASW projectiles to depths of up to {{cvt|1000|m|ftin}}.<ref>{{Cite web|url=http://www.indiandefensenews.in/2018/04/india-reveals-p-17a-frigate.html|title=India Reveals P-17A Configuration|website=indiandefensenews.in|date=27 April | As part of its [[anti-submarine warfare]] (ASW) capabilities, the class features two triple-tube lightweight [[Torpedo tube|torpedo launchers]] for firing ASW torpedoes. The class also features two [[RBU-6000]] (RPK-8) [[Anti-submarine weapon|anti-submarine rocket launchers]], capable of firing ASW projectiles to depths of up to {{cvt|1000|m|ftin}}.<ref>{{Cite web|url=http://www.indiandefensenews.in/2018/04/india-reveals-p-17a-frigate.html|title=India Reveals P-17A Configuration|website=indiandefensenews.in|date=27 April 2018}}</ref> | ||
====Decoys==== | ====Decoys==== | ||
During the class' unveiling in 2018, the frigate's design was noted to possess two anti-torpedo decoy systems and four decoy launchers – which presumably may be the [[Maareech ATDS|NSTL Maareech torpedo-countermeasure system]] and the [[Kavach (anti-missile system)|Kavach anti-missile decoy launchers]], respectively.<ref>{{Cite web|url=https://worldnavalnews.com/india-revealed-p-17a-frigate-configuration/|title=India Revealed P-17A Frigate Configuration At Defexpo 2018|website=worldnavalnews.com|date=30 November | During the class' unveiling in 2018, the frigate's design was noted to possess two anti-torpedo decoy systems and four decoy launchers – which presumably may be the [[Maareech ATDS|NSTL Maareech torpedo-countermeasure system]] and the [[Kavach (anti-missile system)|Kavach anti-missile decoy launchers]], respectively.<ref>{{Cite web|url=https://worldnavalnews.com/india-revealed-p-17a-frigate-configuration/|title=India Revealed P-17A Frigate Configuration At Defexpo 2018|website=worldnavalnews.com|date=30 November 2018}}</ref> | ||
====Aviation facilities==== | ====Aviation facilities==== | ||
As part of its aviation facilities, the class is equipped with a flight-deck and an enclosed aviation hangar, capable of accommodating a single [[Military helicopter|naval helicopter]] – most likely the [[HAL Dhruv|ALH Dhruv MK-III]] maritime-reconnaissance helicopters, or the [[Westland Sea King|Westland Sea King Mk. 42B]] ASW/ASuW helicopters – both of which are operated by the [[Indian Naval Air Arm]].<ref>{{Cite web|url=https://twitter.com/sandeepunnithan/status/1174015087079649281?lang=en|title=Very Significant About The P-17A Frigates – Sandeep Unnithan|via=Twitter|date=17 September | As part of its aviation facilities, the class is equipped with a flight-deck and an enclosed aviation hangar, capable of accommodating a single [[Military helicopter|naval helicopter]] – most likely the [[HAL Dhruv|ALH Dhruv MK-III]] maritime-reconnaissance helicopters, or the [[Westland Sea King|Westland Sea King Mk. 42B]] ASW/ASuW helicopters – both of which are operated by the [[Indian Naval Air Arm]].<ref>{{Cite web|url=https://twitter.com/sandeepunnithan/status/1174015087079649281?lang=en|title=Very Significant About The P-17A Frigates – Sandeep Unnithan|via=Twitter|date=17 September 2019}}</ref> | ||
=== Sensors === | === Sensors === | ||
====Radar==== | ====Radar==== | ||
The class features the [[EL/M-2248 MF-STAR]] [[active electronically scanned array]] (AESA) radar as its primary radar suite.<ref>{{Cite web|url=https://guardingindia.com/india/navy/indian-launches-new-project-17a-class-frigates/|title=Indian launches new Project 17A class frigates|website=guardingindia.com|date=14 December | The class features the [[EL/M-2248 MF-STAR]] [[active electronically scanned array]] (AESA) radar as its primary radar suite.<ref>{{Cite web|url=https://guardingindia.com/india/navy/indian-launches-new-project-17a-class-frigates/|title=Indian launches new Project 17A class frigates|website=guardingindia.com|date=14 December 2020}}</ref> The EL/M-2248 is a multi-function, phased-array radar system featuring an azimuth of 360<sup>o</sup>, with the capability to track both aerial and surface targets, at a range of over {{cvt|450|km|mi}}.<ref>{{Cite web|url=https://www.iai.co.il/p/elm-2248-mf-star|title=ELM-2248 MF-STAR Multi-Function Digital AESA Radar|website=iai.co.il}}</ref> | ||
The class also features the [[Indra Sistemas|Indra LTR-25 'Lanza']] [[surface-search radar]], as its [[secondary surveillance radar|secondary radar]] suite.<ref>{{Cite web|url=https://www.theweek.in/news/india/2020/12/11/kolkata-shipbuilder-to-launch-high-tech-stealth-warship-next-week.html|title=Kolkata shipbuilder to launch high-tech stealth warship next week|website=theweek.in|date=11 December | The class also features the [[Indra Sistemas|Indra LTR-25 'Lanza']] [[surface-search radar]], as its [[secondary surveillance radar|secondary radar]] suite.<ref>{{Cite web|url=https://www.theweek.in/news/india/2020/12/11/kolkata-shipbuilder-to-launch-high-tech-stealth-warship-next-week.html|title=Kolkata shipbuilder to launch high-tech stealth warship next week|website=theweek.in|date=11 December 2020}}</ref> The LTR-25 is a solid-state, three-dimensional (3D), long-range radar capable of operating in a dense electronic environment and features a range of over {{cvt|250|nmi|lk=in}}, with the capability to track various aerial targets – including [[fighter aircraft]] and [[ballistic missile]]s.<ref>{{Cite web|url=https://www.indracompany.com/sites/default/files/indra_ltr-25_radar_en_03_2021_0.pdf|title=Lanza Radar LTR-25|website=indracompany.com}}</ref> | ||
The frigates are also equipped with an advanced combat management system, classified as "CMS-17A", which is reportedly equipped with sophisticated [[data link]]s for high, efficient interoperability with other naval vessels.<ref>{{Cite web|url=https://www.financialexpress.com/defence/project-17-a-know-about-ambitious-project-to-indigenously-build-advanced-stealth-frigates/1712609/|title=Project 17 A: Know about ambitious project to indigenously build advanced stealth frigates|website=financialexpress.com|date=20 September | The frigates are also equipped with an advanced combat management system, classified as "CMS-17A", which is reportedly equipped with sophisticated [[data link]]s for high, efficient interoperability with other naval vessels.<ref>{{Cite web|url=https://www.financialexpress.com/defence/project-17-a-know-about-ambitious-project-to-indigenously-build-advanced-stealth-frigates/1712609/|title=Project 17 A: Know about ambitious project to indigenously build advanced stealth frigates|website=financialexpress.com|date=20 September 2019}}</ref> | ||
====Sonar==== | ====Sonar==== | ||
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====Electronic warfare==== | ====Electronic warfare==== | ||
The frigates feature the ''Shakti'' [[electronic warfare]] (EW) suite – developed by the [[Defence Research and Development Organisation|Defence Electronics Research Laboratory]] (DLRL), for defense against anti-ship missiles and for the interception, detection, classification, identification and jamming of conventional radars.<ref>{{Cite web|url=https://vajiramias.com/current-affairs/shakti/6196f3791d5def39ad1669c1/|title=SHAKTI|website=vajiramias.com|date=29 November | The frigates feature the ''Shakti'' [[electronic warfare]] (EW) suite – developed by the [[Defence Research and Development Organisation|Defence Electronics Research Laboratory]] (DLRL), for defense against anti-ship missiles and for the interception, detection, classification, identification and jamming of conventional radars.<ref>{{Cite web|url=https://vajiramias.com/current-affairs/shakti/6196f3791d5def39ad1669c1/|title=SHAKTI|website=vajiramias.com|date=29 November 2019}}</ref> ''Shakti'' is equipped with wide-band [[Electronic warfare support measures|electronic-support measures]] (ESM), [[electronic countermeasure]]s (ECM), an integrated "Radar Finger Printing System (RFPS)" and a data-recording replay feature for "post-mission analysis".<ref>{{Cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1773020|title=Prime Minister to Formally Handover DRDO Designed and Developed Advanced Electronic Warfare Suite 'Shakti' for Indian Naval Ships to Chief of Naval Staff|website=pib.gov.in|date=18 November 2021}}</ref><ref>{{Cite web|url=https://www.aninews.in/news/national/general-news/pm-modi-to-handover-drdo-designed-advanced-electronic-warfare-suite-to-navy-today20211119054330/|title=PM Modi to handover DRDO designed advanced electronic warfare suite to Navy today|website=aninews.in|date=19 November 2021}}</ref> | ||
=== Propulsion === | === Propulsion === | ||
Each frigate features two [[General Electric LM2500]] [[gas turbine]]s – manufactured by [[GE Aviation]] and two [[MAN Diesel|MAN]] 12V28/33D STC four-stroke engines – manufactured by [[MAN Energy Solutions|MAN Diesel & Turbo]], arranged in a [[combined diesel and gas]] (CODAG) propulsion configuration.<ref>{{Cite web|url=https://www.naval-technology.com/projects/nilgiri-class-project-17a-frigates/|title=Nilgiri-Class (Project 17A) Frigates|website=naval-technology.com|date=17 December | Each frigate features two [[General Electric LM2500]] [[gas turbine]]s – manufactured by [[GE Aviation]] and two [[MAN Diesel|MAN]] 12V28/33D STC four-stroke engines – manufactured by [[MAN Energy Solutions|MAN Diesel & Turbo]], arranged in a [[combined diesel and gas]] (CODAG) propulsion configuration.<ref>{{Cite web|url=https://www.naval-technology.com/projects/nilgiri-class-project-17a-frigates/|title=Nilgiri-Class (Project 17A) Frigates|website=naval-technology.com|date=17 December 2020}}</ref> | ||
In December 2016, the Indian Navy contracted GE Aviation to supply fourteen LM2500 gas turbines for the seven frigates, which were [[Licensed production|license-assembled]] in India by the Industrial & Marine Gas Turbine Division (IMGT) of [[Hindustan Aeronautics Limited]] (HAL).<ref>{{Cite web|url=https://www.navaltoday.com/2016/12/08/lm2500-marine-gas-turbines-to-power-indian-navys-p17a-stealth-frigate/|title=LM2500 marine gas turbines to power Indian Navy’s P17A stealth frigate|website=navaltoday.com|date=8 December | In December 2016, the Indian Navy contracted GE Aviation to supply fourteen LM2500 gas turbines for the seven frigates, which were [[Licensed production|license-assembled]] in India by the Industrial & Marine Gas Turbine Division (IMGT) of [[Hindustan Aeronautics Limited]] (HAL).<ref>{{Cite web|url=https://www.navaltoday.com/2016/12/08/lm2500-marine-gas-turbines-to-power-indian-navys-p17a-stealth-frigate/|title=LM2500 marine gas turbines to power Indian Navy’s P17A stealth frigate|website=navaltoday.com|date=8 December 2016}}</ref> Under the deal, HAL was additionally sanctioned to provide comprehensive services – including the supply of spare parts, maintenance inspections and equipment overhauls.<ref>{{Cite web|url=https://www.turbomachinerymag.com/view/ge-marine-to-provide-lm2500-gas-turbines-for-indian-navys-p17a-frigate|title=GE Marine to provide LM2500 gas turbines for Indian Navy|website=turbomachinerymag.com|date=1 January 2017}}</ref> | ||
At the time of the order, HAL had already delivered eleven LM2500 turbines to the Indian Navy; the turbines are specifically used on multiple Indian warships, most notably on the ''Shivalik''-class frigates.<ref>{{Cite web|url=https://hal-india.co.in/Product_Details.aspx?Mkey=54&lKey=&CKey=35|title=LM 2500|website=hal-india.com}}</ref> | At the time of the order, HAL had already delivered eleven LM2500 turbines to the Indian Navy; the turbines are specifically used on multiple Indian warships, most notably on the ''Shivalik''-class frigates.<ref>{{Cite web|url=https://hal-india.co.in/Product_Details.aspx?Mkey=54&lKey=&CKey=35|title=LM 2500|website=hal-india.com}}</ref> | ||
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In February 2019, MDL contracted GE to supply an assortment of auxiliary equipment to the Indian Navy to support the fourteen engines; under the agreement, GE also handled the design work of the frigate's auxiliary system and its fuel supply system.<ref>{{Cite web|url=https://seapowermagazine.org/ge-to-supply-lm2500-gas-turbine-auxiliary-equipment-for-indian-navys-p17a-frigates/|title=GE to Supply LM2500 Gas Turbine Auxiliary Equipment for Indian Navy’s P17A Frigates|website=seapowermagazine.org|date=8 February 2022}}</ref> | In February 2019, MDL contracted GE to supply an assortment of auxiliary equipment to the Indian Navy to support the fourteen engines; under the agreement, GE also handled the design work of the frigate's auxiliary system and its fuel supply system.<ref>{{Cite web|url=https://seapowermagazine.org/ge-to-supply-lm2500-gas-turbine-auxiliary-equipment-for-indian-navys-p17a-frigates/|title=GE to Supply LM2500 Gas Turbine Auxiliary Equipment for Indian Navy’s P17A Frigates|website=seapowermagazine.org|date=8 February 2022}}</ref> | ||
In May 2016, the Indian Navy contracted MAN Diesel & Turbo to supply fourteen MAN 12V28/33D STC four-stroke engines for the seven frigates; under the deal, the requisite parts needed for the engines were sourced from India, while the engines' final assembly and testing were conducted at MAN's facility in [[Aurangabad]], [[India]].<ref>{{Cite web|url=https://www.defenseworld.net/news/16091/Indian_Navy_Orders_MAN_Medium_Diesel_Engines_For_Stealth_Frigates#.YgHStOpBzIU|title=Indian Navy Orders MAN Medium Diesel Engines For Stealth Frigates|website=defenseworld.net|date=18 May | In May 2016, the Indian Navy contracted MAN Diesel & Turbo to supply fourteen MAN 12V28/33D STC four-stroke engines for the seven frigates; under the deal, the requisite parts needed for the engines were sourced from India, while the engines' final assembly and testing were conducted at MAN's facility in [[Aurangabad]], [[India]].<ref>{{Cite web|url=https://www.defenseworld.net/news/16091/Indian_Navy_Orders_MAN_Medium_Diesel_Engines_For_Stealth_Frigates#.YgHStOpBzIU|title=Indian Navy Orders MAN Medium Diesel Engines For Stealth Frigates|website=defenseworld.net|date=18 May 2016}}</ref> | ||
== History == | == History == | ||
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===Background=== | ===Background=== | ||
[[File:Nilgiri class Frigate.webm|thumb|left|Nilgiri class CG]] | [[File:Nilgiri class Frigate.webm|thumb|left|Nilgiri class CG]] | ||
In June 2009, the Defence Acquisition Council (DAC) – the main acquisition panel subordinate to India's [[Ministry of Defence (India)|Ministry of Defence]] (MoD), cleared a proposal for the procurement of seven stealth frigates at a cost of ₹45,000 crore – classified as "Project 17A" – on the lines of the Indian Navy's initiative of establishing a 160-ship fleet.<ref>{{Cite web|url=http://archive.indianexpress.com/news/navy-seals-45000cr-deal-seven-warships/479132/|title= Archive – Navy seals 45,000-cr deal: seven warships|website=archive.indianexpress.com|date=20 June | In June 2009, the Defence Acquisition Council (DAC) – the main acquisition panel subordinate to India's [[Ministry of Defence (India)|Ministry of Defence]] (MoD), cleared a proposal for the procurement of seven stealth frigates at a cost of ₹45,000 crore – classified as "Project 17A" – on the lines of the Indian Navy's initiative of establishing a 160-ship fleet.<ref>{{Cite web|url=http://archive.indianexpress.com/news/navy-seals-45000cr-deal-seven-warships/479132/|title= Archive – Navy seals 45,000-cr deal: seven warships|website=archive.indianexpress.com|date=20 June 2009}}</ref> | ||
In September 2012, the [[Cabinet Committee on Security]] (CCS) – India's top decision-making institution on matters related to defense and national security, green-lighted the proposal for the "development cum construction" of the seven frigates.<ref>{{Cite web |url=http://www.forceindia.net/NovFeatureReport7.aspx |title=CCNS finally kickstarts Indian Navy’s Project 17A |website=webarchive.org |date=September 2012 |archive-url=https://web.archive.org/web/20150218093318/http://www.forceindia.net/NovFeatureReport7.aspx |archive-date=18 February 2015 |url-status=dead}}</ref> Initially, the Indian Navy favoured a proposal of building the first two frigates at a foreign shipyard – seeking to minimize the project's overall construction timeline; however, this suggestion was overruled by India's [[Ministry of Defence (India)|Ministry of Defence]] (MoD) – which favoured indigenous production of the frigates.<ref>{{Cite web|url=https://www.ajaishukla.com/2009/07/project-17-all-seven-new-stealth.html|title=Project 17-A : All seven frigates to be built in India|website=ajaishukla.com|date=20 January | In September 2012, the [[Cabinet Committee on Security]] (CCS) – India's top decision-making institution on matters related to defense and national security, green-lighted the proposal for the "development cum construction" of the seven frigates.<ref>{{Cite web |url=http://www.forceindia.net/NovFeatureReport7.aspx |title=CCNS finally kickstarts Indian Navy’s Project 17A |website=webarchive.org |date=September 2012 |archive-url=https://web.archive.org/web/20150218093318/http://www.forceindia.net/NovFeatureReport7.aspx |archive-date=18 February 2015 |url-status=dead}}</ref> Initially, the Indian Navy favoured a proposal of building the first two frigates at a foreign shipyard – seeking to minimize the project's overall construction timeline; however, this suggestion was overruled by India's [[Ministry of Defence (India)|Ministry of Defence]] (MoD) – which favoured indigenous production of the frigates.<ref>{{Cite web|url=https://www.ajaishukla.com/2009/07/project-17-all-seven-new-stealth.html|title=Project 17-A : All seven frigates to be built in India|website=ajaishukla.com|date=20 January 2013}}</ref> | ||
The seven frigates were envisioned as a "follow-on series" to the ''Shivalik''-class frigates (Project 17), which were also being built for the Indian Navy at the time, but equipped with more sophisticated capabilities.<ref>{{Cite web|url=https://timesofindia.indiatimes.com/india/govt-approves-construction-of-7-stealth-frigates-6-nuclear-powered-submarines/articleshow/46281364.cms|title=Government approves construction of seven stealth frigates, 6 nuclear-powered submarines|website=The Times of India|date=18 February | The seven frigates were envisioned as a "follow-on series" to the ''Shivalik''-class frigates (Project 17), which were also being built for the Indian Navy at the time, but equipped with more sophisticated capabilities.<ref>{{Cite web|url=https://timesofindia.indiatimes.com/india/govt-approves-construction-of-7-stealth-frigates-6-nuclear-powered-submarines/articleshow/46281364.cms|title=Government approves construction of seven stealth frigates, 6 nuclear-powered submarines|website=The Times of India|date=18 February 2015}}</ref> The designing-process of the seven frigates was completed in mid-2013.<ref>{{Cite web|url=https://www.indiatoday.in/india/story/indigenous-aircraft-carrier-ins-vikramaditya-directorate-of-naval-design-a.k.-antony-talwar-class-shivalik-class-172819-2013-08-05|title=Navy designs India's largest ever ship, focuses on stealth and futuristic frigates|date=5 August 2013}}</ref> | ||
The project – consisting of the construction of the seven designated frigates over a span of five years – was formally approved by the CCS in February 2015.<ref>{{Cite web|url=https://www.business-standard.com/article/economy-policy/rs-50k-cr-naval-project-gets-cabinet-nod-115021800042_1.html|title=Rs 50k-cr naval project gets Cabinet nod|website=business-standard.com|date=18 February | The project – consisting of the construction of the seven designated frigates over a span of five years – was formally approved by the CCS in February 2015.<ref>{{Cite web|url=https://www.business-standard.com/article/economy-policy/rs-50k-cr-naval-project-gets-cabinet-nod-115021800042_1.html|title=Rs 50k-cr naval project gets Cabinet nod|website=business-standard.com|date=18 February 2015}}</ref> | ||
===Construction=== | ===Construction=== | ||
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====Garden Reach Shipbuilders & Engineers==== | ====Garden Reach Shipbuilders & Engineers==== | ||
[[File:INS Himgiri during its launch ceremony.jpg|thumb|The launch of {{INS|Himgiri|2020|6}}, the first ship of the batch being built by GRSE.]] | [[File:INS Himgiri during its launch ceremony.jpg|thumb|The launch of {{INS|Himgiri|2020|6}}, the first ship of the batch being built by GRSE.]] | ||
In February 2015, the Indian Navy contracted Garden Reach Shipbuilders & Engineers (GRSE), a [[Kolkata]]-based public-sector shipyard, to build three P-17A frigates at an estimated cost of ₹19,294 crore.<ref>{{Cite web|url=https://www.defenseworld.net/news/12774/GRSE_Wins__3_1_Billion_Indian_Navy___s_Frigate_Order#.YgZ1uupBzIV|title=GRSE Wins $3.1 Billion Indian Navy’s Frigate Order|website=defenseworld.net|date=23 April | In February 2015, the Indian Navy contracted Garden Reach Shipbuilders & Engineers (GRSE), a [[Kolkata]]-based public-sector shipyard, to build three P-17A frigates at an estimated cost of ₹19,294 crore.<ref>{{Cite web|url=https://www.defenseworld.net/news/12774/GRSE_Wins__3_1_Billion_Indian_Navy___s_Frigate_Order#.YgZ1uupBzIV|title=GRSE Wins $3.1 Billion Indian Navy’s Frigate Order|website=defenseworld.net|date=23 April 2015}}</ref> According to the terms of the contract, GRSE is slated to deliver the three frigates in 2023, 2024 and 2025, respectively. In preparation for the order, GRSE re-augmented its infrastructure by establishing newer "modular" shipyards along with a [[Samson and Goliath (cranes)|Goliath gantry crane]], meant for enabling the construction of the frigates in a short time frame.<ref>{{Cite web|url=https://timesofindia.indiatimes.com/india/india-finalizing-mega-stealth-frigates-project-for-over-rs-50000-crore/articleshow/14783631.cms|title=India finalizing mega stealth frigates' project for over Rs 50,000 crore|website=The Times of India|date=9 July 2012}}</ref> | ||
A significant proportion of the hull's blocks needed for the vessel's construction was procured from smaller shipyards and metal fabrication shops in and around Kolkata, while the construction/fabrication of additional infrastructure was done at GRSE's [[Rajabagan]] shipyard.<ref>{{Cite web|url=https://www.janes.com/defence-news/news-detail/first-grse-built-p17a-frigate-enters-water|title=First GRSE-built frigate enters water|website=janes.com|date=15 December | A significant proportion of the hull's blocks needed for the vessel's construction was procured from smaller shipyards and metal fabrication shops in and around Kolkata, while the construction/fabrication of additional infrastructure was done at GRSE's [[Rajabagan]] shipyard.<ref>{{Cite web|url=https://www.janes.com/defence-news/news-detail/first-grse-built-p17a-frigate-enters-water|title=First GRSE-built frigate enters water|website=janes.com|date=15 December 2020}}</ref> | ||
The construction of the first frigate began in November 2018, while work on the second and third frigates began in January 2020 and March 2021, respectively.<ref>{{Cite web|url=https://www.navaltoday.com/2018/11/13/grse-starts-construction-of-their-first-project-17a-frigate-for-indian-navy/|title=GRSE Starts Construction of Their First P17A Frigate for the Indian Navy|website=navyrecognition.com|date=13 November | The construction of the first frigate began in November 2018, while work on the second and third frigates began in January 2020 and March 2021, respectively.<ref>{{Cite web|url=https://www.navaltoday.com/2018/11/13/grse-starts-construction-of-their-first-project-17a-frigate-for-indian-navy/|title=GRSE Starts Construction of Their First P17A Frigate for the Indian Navy|website=navyrecognition.com|date=13 November 2018}}</ref> The first of the three frigates, ''Himgiri'', was [[Ceremonial ship launching|launched]] on 14 December 2020, with its delivery slated to occur for August 2023.<ref>{{Cite web|url=https://www.deccanherald.com/national/grse-built-stealth-frigate-himgiri-launched-general-bipin-rawat-calls-it-a-historic-moment-927390.html|title=GRSE-built stealth frigate Himgiri launched; General Bipin Rawat calls it a 'historic moment'|website=deccanherald.com|date=14 December 2020}}</ref> The second frigate, ''Dunagiri'', was launched on 15 June 2022, with its delivery slated to occur in 2024.<ref name="Dunagiri">{{Cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1841774|title=Raksha Mantri launches Y- 3023 Dunagiri, Project 17A frigate at GRSE Ltd, Kolkata|website=www.pib.gov.in|date=15 July 2022}}</ref> | ||
====Mazagon Dock Shipbuilders Limited==== | ====Mazagon Dock Shipbuilders Limited==== | ||
[[File:INS Nilgiri in Mumbai on September 28, 2019.jpg|thumb|left|The launch of {{INS|Nilgiri|2019|6}}, the lead vessel of the class.]] | [[File:INS Nilgiri in Mumbai on September 28, 2019.jpg|thumb|left|The launch of {{INS|Nilgiri|2019|6}}, the lead vessel of the class.]] | ||
In February 2015, the Indian Navy contracted Mazagon Dock Shipbuilders Limited (MDL), a [[Mumbai]]-based public-sector shipyard, to build four P-17A frigates at an estimated cost of over ₹21,000 crore.<ref>{{Cite web|url=https://www.hdfcsec.com/hsl.research.pdf/Mazagon_Final.pdf|title=Mazagon Dock Shipbuilders Limited|website=hdfcsec.com|date=15 July 2021}}</ref><ref>{{Cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1595028|title=More than 180 contracts valued over Rs 1,96,000 crore signed with Indian Defense Industry since 2014|website=pib.gov.in|date=5 December | In February 2015, the Indian Navy contracted Mazagon Dock Shipbuilders Limited (MDL), a [[Mumbai]]-based public-sector shipyard, to build four P-17A frigates at an estimated cost of over ₹21,000 crore.<ref>{{Cite web|url=https://www.hdfcsec.com/hsl.research.pdf/Mazagon_Final.pdf|title=Mazagon Dock Shipbuilders Limited|website=hdfcsec.com|date=15 July 2021}}</ref><ref>{{Cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1595028|title=More than 180 contracts valued over Rs 1,96,000 crore signed with Indian Defense Industry since 2014|website=pib.gov.in|date=5 December 2019}}</ref> According to the terms of the contract, MDL is to deliver the four frigates in 2022, 2023, 2024 and 2025, respectively.<ref>{{Cite web|url=https://thediplomat.com/2021/08/a-tale-of-2-navies-india-and-chinas-current-carrier-and-escort-procurement/|title=A Tale of Two Navies: India and China’s Current Carrier and Escort Procurement|website=thediplomat.com|date=4 August 2021}}</ref> | ||
The four frigates were built at different locations, namely, at MDL's main shipbuilding facility in Mumbai, at MDL's subordinate facility in [[Navi Mumbai|Nhava]], at a smaller shipbuilding facility also operated by MDL in Mumbai, at an MSE shipyard in [[Gujarat]] and at another shipyard in [[Goa]].<ref>{{Cite web|url=https://maritimeindia.org/wp-content/uploads/2020/11/Making-Waves_26-Oct-01-Nov-2020_Web-Upload_OLIVER.pdf|title=Making Waves|website=maritimeindia.org|date=31 October | The four frigates were built at different locations, namely, at MDL's main shipbuilding facility in Mumbai, at MDL's subordinate facility in [[Navi Mumbai|Nhava]], at a smaller shipbuilding facility also operated by MDL in Mumbai, at an MSE shipyard in [[Gujarat]] and at another shipyard in [[Goa]].<ref>{{Cite web|url=https://maritimeindia.org/wp-content/uploads/2020/11/Making-Waves_26-Oct-01-Nov-2020_Web-Upload_OLIVER.pdf|title=Making Waves|website=maritimeindia.org|date=31 October 2020}}</ref> Similarly to GRSE, MDL also upgraded its existing infrastructure; the shipyard augmenting its existing facilities with newer equipment, including a "Goliath" gantry crane, a module workshop, a [[Retention basin|wet basin]] and a "cradle assembly" shop, meant to facilitate modular construction.<ref>{{Cite web|url=https://pib.gov.in/newsite/PrintRelease.aspx?relid=136912|title=Modernization and Security of Shipyards|website=pib.gov.in|date=26 February 2016}}</ref> | ||
The construction of the first frigate began in December 2017, while work on the second, third and fourth frigates began in May 2019, September 2020 and June 2022, respectively.<ref>{{Cite web|url=https://www.naval-technology.com/news/construction-begins-on-indian-navys-third-p17a-class-stealth-frigate/|title=Construction Begins on Indian Navy's Third P17A Class Stealth Frigate|website=naval-technology.com|date=11 September | The construction of the first frigate began in December 2017, while work on the second, third and fourth frigates began in May 2019, September 2020 and June 2022, respectively.<ref>{{Cite web|url=https://www.naval-technology.com/news/construction-begins-on-indian-navys-third-p17a-class-stealth-frigate/|title=Construction Begins on Indian Navy's Third P17A Class Stealth Frigate|website=naval-technology.com|date=11 September 2020}}</ref><ref>{{Cite web|url=https://www.freepressjournal.in/corporate-corner/mazagon-dock-shipbuilders-limited-mdl/mdl-commences-production-of-y-12654-fourth-ship-of-p17a|title=MDL commences production of Y-12654, fourth ship of P17A|website=freepressjournal.in|date=30 January 2020}}</ref> The first of the four frigates, ''Nilgiri'', was launched on 28 September 2019, with its delivery slated to occur in August 2022.<ref>{{Cite web|url=https://www.defenseworld.net/news/25576/India_Launches____INS_Nilgiri____Stealth_Frigate#.YgcrEupBzIU|title=India Launches 'INS Nilgiri' Stealth Frigate|website=defenseworld.net|date=28 September 2019}}</ref> The second frigate of the four frigates, ''Udaygiri'', was launched on 17 May 2022, in a ceremony coinciding with the launch of {{INS|Surat|D69|6}}, a {{sclass|Visakhapatnam|destroyer}}.<ref>{{Cite web|url=https://www.rediff.com/news/report/ins-surat-ins-udaygiri-ready-to-protect-india/20220517.htm|title=INS Surat, INS Udaygiri Ready To Protect India|website=rediff.com|date=17 May 2022}}</ref> The third frigate, ''Taragiri'', was launched on 11 September 2022, and is scheduled to be delivered in 2025.<ref>{{Cite web|url=https://www.thehindu.com/news/national/indian-navy-launches-stealth-frigate-taragiri/article65878683.ece|title=Third stealth frigate of project 17A ‘Taragiri’ launched|website=www.thehindu.com|date=12 September 2022}}</ref> | ||
== Ships in the class == | == Ships in the class == | ||
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|12651 | |12651 | ||
| rowspan="4" |[[Mazagon Dock Shipbuilders|Mazagon Dock Shipbuilders Limited]] (MDL) | | rowspan="4" |[[Mazagon Dock Shipbuilders|Mazagon Dock Shipbuilders Limited]] (MDL) | ||
| 28 December 2017<ref name="mdl_p17a">{{cite news |url=https://www.mid-day.com/articles/construction-of-p17a-class-stealth-frigates-begins/18867199 |title=Construction of P17A class stealth frigates begins |work=Mid Day |date=29 December 2017 |archive-url=https://web.archive.org/web/20171229110312/https://www.mid-day.com/articles/construction-of-p17a-class-stealth-frigates-begins/18867199 |archive-date=29 December | | 28 December 2017<ref name="mdl_p17a">{{cite news |url=https://www.mid-day.com/articles/construction-of-p17a-class-stealth-frigates-begins/18867199 |title=Construction of P17A class stealth frigates begins |work=Mid Day |date=29 December 2017 |archive-url=https://web.archive.org/web/20171229110312/https://www.mid-day.com/articles/construction-of-p17a-class-stealth-frigates-begins/18867199 |archive-date=29 December 2017}}</ref> | ||
|28 September 2019<ref>{{cite news|title=Rajnath Singh launches warship Nilgiri in Mumbai |url=https://timesofindia.indiatimes.com/india/rajnath-singh-launches-warship-nilgiri-in-mumbai/articleshow/71347085.cms|work=The Times of India|agency=Asian News international|date=28 September 2019|language=en}}</ref> | |28 September 2019<ref>{{cite news|title=Rajnath Singh launches warship Nilgiri in Mumbai |url=https://timesofindia.indiatimes.com/india/rajnath-singh-launches-warship-nilgiri-in-mumbai/articleshow/71347085.cms|work=The Times of India|agency=Asian News international|date=28 September 2019|language=en}}</ref> | ||
| 2023 (expected) | | 2023 (expected) | ||
| Launched<ref>{{Cite web|url=https://www.navyrecognition.com/index.php/naval-news/naval-news-archive/2019/september/7526-navy-of-india-has-launched-its-first-stealth-p-17a-nilgiri-class-frigate-ins-nilgiri.html|title=Indian Navy has launched first stealth P-17A Nilgiri-class frigate INS Nilgiri|website=navyrecognition.com|date=29 September | | Launched<ref>{{Cite web|url=https://www.navyrecognition.com/index.php/naval-news/naval-news-archive/2019/september/7526-navy-of-india-has-launched-its-first-stealth-p-17a-nilgiri-class-frigate-ins-nilgiri.html|title=Indian Navy has launched first stealth P-17A Nilgiri-class frigate INS Nilgiri|website=navyrecognition.com|date=29 September 2019}}</ref> | ||
|- | |- | ||
|''[[INS Udaygiri (2022)|Udaygiri]]'' | |''[[INS Udaygiri (2022)|Udaygiri]]'' | ||
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| | | | ||
|12653 | |12653 | ||
|10 September 2020<ref>{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1653068|title= Keel laid for the third stealth frigate of Project 17A|publisher=PIB|access-date=10 September | |10 September 2020<ref>{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1653068|title= Keel laid for the third stealth frigate of Project 17A|publisher=PIB|access-date=10 September 2020}}</ref> | ||
|11 September 2022 <ref>{{cite web |title=India Launches Stealth Frigate "Taragiri" |url=https://www.ndtv.com/india-news/indian-navy-launches-stealth-frigate-taragiri-3335050 |access-date=11 September 2022}}</ref> | |11 September 2022 <ref>{{cite web |title=India Launches Stealth Frigate "Taragiri" |url=https://www.ndtv.com/india-news/indian-navy-launches-stealth-frigate-taragiri-3335050 |access-date=11 September 2022}}</ref> | ||
|August 2025 (expected)<ref>{{Cite web|url=https://www.navalnews.com/naval-news/2022/09/indias-mdl-launches-5th-nilgiri-class-p17a-frigate/|title=India’s MDL Launches 5th Nilgiri-Class P17A Frigate|website=www.navalnews.com|date=11 September 2022}}</ref> | |August 2025 (expected)<ref>{{Cite web|url=https://www.navalnews.com/naval-news/2022/09/indias-mdl-launches-5th-nilgiri-class-p17a-frigate/|title=India’s MDL Launches 5th Nilgiri-Class P17A Frigate|website=www.navalnews.com|date=11 September 2022}}</ref> | ||
|Launched<ref>{{cite web |title=Commencement of Production of Third Ship of Project – 17A |url=http://www.psuconnect.in/news/commencement-of-production-of-third-ship-of-project---17a/17340 |website=psuconnect.in |access-date=11 May | |Launched<ref>{{cite web |title=Commencement of Production of Third Ship of Project – 17A |url=http://www.psuconnect.in/news/commencement-of-production-of-third-ship-of-project---17a/17340 |website=psuconnect.in |access-date=11 May 2019}}</ref> | ||
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|February 2025 (expected) | |February 2025 (expected) | ||
|Under construction<ref>{{cite magazine|author=<!--Staff writer(s); no by-line.--> |title= SP's Naval Force Roundup |url=http://www.spsnavalforces.com/e-magazine/?magid=70&Name=sp_s_naval_forces_1-2020&Info=SP%27s%20Naval%20Forces%20Issue%201%20-%202020&year=2020 |magazine= SP's Naval Force |location= India |publisher=SP Guide Publication |access-date= 1 March | |Under construction<ref>{{cite magazine|author=<!--Staff writer(s); no by-line.--> |title= SP's Naval Force Roundup |url=http://www.spsnavalforces.com/e-magazine/?magid=70&Name=sp_s_naval_forces_1-2020&Info=SP%27s%20Naval%20Forces%20Issue%201%20-%202020&year=2020 |magazine= SP's Naval Force |location= India |publisher=SP Guide Publication |access-date= 1 March 2020}}</ref> | ||
|- | |- | ||
|[[INS Himgiri (2020)|''Himgiri'']] | |[[INS Himgiri (2020)|''Himgiri'']] | ||
| Line 242: | Line 242: | ||
| 3022 | | 3022 | ||
| rowspan="3" |[[Garden Reach Shipbuilders & Engineers]] (GRSE) | | rowspan="3" |[[Garden Reach Shipbuilders & Engineers]] (GRSE) | ||
|10 November 2018<ref>{{cite news |last1=Dominguez |first1=Gabriel |title=GRSE lays keel for Indian Navy's second Project 17A frigate |url=https://www.janes.com/article/84579/grse-lays-keel-for-indian-navy-s-second-project-17a-frigate |work=IHS Jane's Defence Weekly |date=14 November 2018 |archive-url=https://web.archive.org/web/20181114194943/https://www.janes.com/article/84579/grse-lays-keel-for-indian-navy-s-second-project-17a-frigate |archive-date=14 November | |10 November 2018<ref>{{cite news |last1=Dominguez |first1=Gabriel |title=GRSE lays keel for Indian Navy's second Project 17A frigate |url=https://www.janes.com/article/84579/grse-lays-keel-for-indian-navy-s-second-project-17a-frigate |work=IHS Jane's Defence Weekly |date=14 November 2018 |archive-url=https://web.archive.org/web/20181114194943/https://www.janes.com/article/84579/grse-lays-keel-for-indian-navy-s-second-project-17a-frigate |archive-date=14 November 2018}}</ref> | ||
|14 December 2020<ref name="himgirilaunch">{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1680561|title= LAUNCH OF 2nd PROJECT 17A SHIP 'HIMGIRI'|publisher=PIB|date=14 December | |14 December 2020<ref name="himgirilaunch">{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1680561|title= LAUNCH OF 2nd PROJECT 17A SHIP 'HIMGIRI'|publisher=PIB|date=14 December 2020}}</ref> | ||
|August 2023 (expected) | |August 2023 (expected) | ||
|Launched<ref>{{Cite web|url=https://navalpost.com/india-launches-2nd-project-17a-frigate-himgiri/|title=India launches 2nd Project 17A frigate "Himgiri"|website=navalpost.com|date=15 December | |Launched<ref>{{Cite web|url=https://navalpost.com/india-launches-2nd-project-17a-frigate-himgiri/|title=India launches 2nd Project 17A frigate "Himgiri"|website=navalpost.com|date=15 December 2020}}</ref> | ||
|- | |- | ||
| ''[[INS Dunagiri (2022)|''Dunagiri'']]'' | | ''[[INS Dunagiri (2022)|''Dunagiri'']]'' | ||
| Line 251: | Line 251: | ||
| 3023 | | 3023 | ||
|24 January 2020<ref>{{Cite web|url=https://psuwatch.com/project-17a-grse-starts-building-2nd-advanced-stealth-frigate/|title=Project 17A: GRSE starts building 2nd Advanced Stealth Frigate | |24 January 2020<ref>{{Cite web|url=https://psuwatch.com/project-17a-grse-starts-building-2nd-advanced-stealth-frigate/|title=Project 17A: GRSE starts building 2nd Advanced Stealth Frigate | ||
|website=psuwatch.com|date=24 January | |website=psuwatch.com|date=24 January 2020}}</ref> | ||
|15 July 2022<ref>{{cite web|url=http://www.grse.in/images/press_news/EQUITYBULL20S.jpg|title=Garden Reach Shipbuilders & Engineers – Q4FY21 – ICICI Securities|publisher=GRSE|access-date=2021-06-05}}</ref> | |15 July 2022<ref>{{cite web|url=http://www.grse.in/images/press_news/EQUITYBULL20S.jpg|title=Garden Reach Shipbuilders & Engineers – Q4FY21 – ICICI Securities|publisher=GRSE|access-date=2021-06-05}}</ref> | ||
|August 2024 (expected) | |August 2024 (expected) | ||