NXHLillian: Starting first info and citations

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Starting first info and citations

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{{short description|Diving support vessels for the Indian Navy}}
{{Use dmy dates|date=June 2023}}
{{Use Indian English|date=June 2023}}
{{distinguish|text=[[INS Nistar (1969)|INS Nistar]], which served in Indian Navy from 1969 to 1989}}
{{Infobox ship 
|section1={{Infobox ship/image
| image = Nistar (A16), diving support vesssel during Yoga day practise.jpg
| image_caption = ''Nistar'' personnel performing Yoga
}}

|section2={{Infobox ship/class overview
| builders = [[Hindustan Shipyard]] (HSL)
| operators = {{navy|India}}
| class_before =
| class_after =
| subclasses =
| built_range =
| in_commission_range =
| total_ships_building =
| total_ships_planned = 2
| total_ships_completed = 2
| total_ships_canceled =
| total_ships_active = 1
| total_ships_laid_up =
| total_ships_lost =
| total_ships_retired =
| total_ships_scrapped =
| cost = *{{INRConvert|2392.94|c|lk=on|year=2018}}
*{{INRConvert|1196.47|c|lk=on|year=2018}} per unit (FY 2018)
| total_ships_preserved =
}}

|section3={{Infobox ship/characteristics
| hide_header =
| header_caption =
| type = [[Diving support vessel]]
| displacement = {{convert|9350|t|LT|lk=on|0|abbr=on}}<ref name="PIB-220922"/>
| length = {{convert|118.4|m|ftin|abbr=on}}<ref name="PIB-220922"/>
| beam = {{convert|22.8|m|ftin|abbr=on}}<ref name="PIB-220922"/>
| draft =
| draught =
| propulsion = 2 × diesel engine
| speed =
| range =
| endurance =
| complement = 1 × [[Deep-submergence rescue vehicle#India|Deep-submergence rescue vehicle]]<ref name="PIB-220922"/>
| sensors = *Navigation radar
*2 × [[Bharat Electronics|BEL]] Lynx-U2
*2 × EOIRST [[fire-control system]] for [[CIWS]]
| EW = *1 × EW Suite
| armament = *2 × 30 mm/65 [[AK-630]] [[CIWS]]
| aircraft = 1 × {{convert|15|t|LT|lk=on|abbr=on}} helicopter.
| aircraft_facilities =
| notes =
}}
}}
The '''''Nistar'' class''' is a series of two [[diving support vessel]]s being built by [[Hindustan Shipyard]] (HSL) for the [[Indian Navy]].<ref name="FPJ-171220">{{cite web|date=17 December 2020|title=Defence Ministry clears 11 advance warships for Navy, 6 surveillance planes for IAF|url=https://www.freepressjournal.in/india/defence-ministry-clears-11-advance-warships-for-navy-6-surveillance-planes-for-iaf|publisher=[[The Free Press Journal]]}}</ref> The deal was signed on 20 September 2018 with the delivery of the ships is scheduled to commence from July 2023. The primary role of the vessels to support the Indian Navy's submarine fleet and meet various operational requirements such as [[submarine rescue]], [[Deep diving|deep sea diving]] operations, sustained patrolling, [[Non-combatant evacuation operation#India|non combatant evacuation operations]] and [[search and rescue]] (SAR).<ref name="PIB-220922"/> The induction of the vessels helps the Indian Navy to prioritize submarine operations in the [[Indo-Pacific]].<ref>{{Cite web |date=2024-06-12 |title=Indian Navy Prioritises Submarine Operations in the Indo-Pacific with Diving Support Vessels (DSVs) |url=https://www.financialexpress.com/business/defence-indian-navy-prioritises-submarine-operations-in-the-indo-pacific-with-diving-support-vessels-dsvs-3522845/ |access-date=2025-02-06 |website=Financialexpress |language=en}}</ref>

== History ==
The ''Nistar''-class project is a series of two [[diving support vessel]]s being built to support [[Indian Navy]]'s expanding [[List of submarines of the Indian Navy|submarine fleet]]. These ships will act as a [[mother ship]] to the recently acquired [[Deep-submergence rescue vehicle#Indian models|deep-submergence rescue vehicle]] (DSRV) for rescuing and aiding submarines in need. In December 2017, [[Hindustan Shipyard]] (HSL) won a bid to build two ships for {{INRConvert|2019|c|lk=on|year=2017}}.<ref>{{cite web|last=Siddiqui|first=Huma|date=16 September 2017|title=Indian Navy's Rs 1010 cr vessel contract bagged by Hindustan Shipyard; L&T puts in highest bid|url=http://www.financialexpress.com/industry/indian-navys-rs-1010-cr-vessel-contract-bagged-by-hindustan-shipyard-lt-puts-in-highest-bid/857364/|access-date=26 December 2017|website=Financial Express|publisher=The Indian Express}}</ref> The Indian Navy signed a contract with the HSL to indigenously design, develop and manufacture these ships on 20 September 2018.<ref name="FE-260918">{{cite web|url=https://www.financialexpress.com/business/defence-hindustan-shipyard-limited-to-construct-diving-support-vessels-for-indian-navy-here-are-details-1327835/|title=Hindustan Shipyard Limited to construct Diving Support Vessels for Indian Navy |work=[[The Financial Express (India)|Financial Express]]|date=26 September 2018}}</ref><ref name="HSDSV">{{cite web |date=26 September 2018 |title=Contract for construction of diving support Vessels(DSV) signed |url=http://pib.nic.in/PressReleaseIframePage.aspx?PRID=1547291 |access-date=26 September 2018 |publisher=Press Information Bureau, Government of India}}</ref> Initially, the displacement of the vessel was limited to {{convert|7650|t|LT|0|abbr=on}} which later increased to {{convert|9350|t|LT|0|abbr=on}}.<ref name="IN-200918">{{cite news|title=Contract for Construction of Diving Support Vessels (DSV) Signed
|url=https://www.indiannavy.nic.in/node/20831|work=[[Indian Navy]]|date=20 September 2018}}</ref><ref name="PIB-200918">{{cite report|title=Contract for Construction of Diving Support Vessels (DSV) Signed|work=[[Press Information Bureau]]|url=https://pib.gov.in/PressReleaseIframePage.aspx?PRID=1547291|date=2018-09-20}}</ref><ref name="TH-070718">{{cite news |last1=Patnaik |first1=Santosh |title= HSL to sign contract to build two Diving Support Vessels soon |url=https://www.thehindu.com/news/national/andhra-pradesh/hsl-to-sign-contract-to-build-two-diving-support-vessels-soon/article24362154.ece |work=[[The Hindu]] |date=2018-07-07}}</ref>

The deal that was signed in September 2018 had a value of {{INRConvert|2392.94|c|lk=on|year=2018}}. The aim was to deliver the first vessel within 36 months of signing the deal. However, there was considerable delay due to the [[COVID-19 pandemic in India|COVID-19 pandemic]] with the [[Ceremonial ship launching|launching]] of the ships done in September 2022 and the first delivery expected in July 2023, this tantamount to a delay of two years.<ref name="PIB-210922">{{cite report|title=Launch Of Two Diving Support Vessels At Hindustan Shipyard Ltd, Vizag On 22 Sep 2022|work=[[Press Information Bureau]]|url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=1861273|date=2022-09-21}}</ref>

The project was awarded to HSL on a nomination basis to improve the financial standing of the shipyard. HSL began construction activities for the project in 2019.<ref name="TH-090219">{{cite news |last1=Patnaik |first1=Santosh |title= HSL begins work for DivingSupport Vessels project |url=https://www.thehindu.com/news/national/andhra-pradesh/hsl-begins-work-for-diving-support-vessels-project/article26219522.ece |work=[[The Hindu]] |date=2019-02-09}}</ref>
=== Namesake ===
The class of ships and the first ship is named after {{INS|Nistar}}, a [[submarine rescue ship]], which was acquired from the erstwhile [[Soviet Navy]] in 1969 and had served until 1989. From then onwards, until the commissioning of this class of diving support vessels, the Indian Navy relied on commercially-leased vessels, like SCI ''Sabarmati'',<ref>{{Cite web |last=Menon |first=Adithya Krishna |date=2025-07-19 |title=Indian Navy Inducts New Diving Support Vessel, To Serve As Mothership For DSRV |url=https://www.navalnews.com/naval-news/2025/07/indian-navy-inducts-new-diving-support-vessel-to-serve-as-mothership-for-dsrv/ |access-date=2025-07-23 |website=Naval News |language=en-US}}</ref> to accomplish these roles.<ref name=":4">{{Cite web |date=2025-07-19 |title=How newly commissioned INS Nistar will help save lives in deep sea |url=https://indianexpress.com/article/explained/all-about-ins-nipun-how-it-will-help-save-lives-in-deep-sea-10135689/ |url-status=live |archive-url=https://web.archive.org/web/20250723181704/https://indianexpress.com/article/explained/all-about-ins-nipun-how-it-will-help-save-lives-in-deep-sea-10135689/ |archive-date=2025-07-23 |access-date=2025-07-23 |website=The Indian Express |language=en}}</ref>

== Design ==

The ships will have a displacement of {{convert|9350|t|LT|0|abbr=on}} which has considerably increased from the contracted weight of {{convert|7650|t|LT|abbr=on|0}}. The reason for the substantial increase in weight has not been disclosed but it can be corroborated to increased role of the ship.{{Citation needed|date=October 2025}} The length of {{Convert|118.4|m|ftin}} and a [[Beam (nautical)|beam]] of {{convert|22.8|m|ftin|abbr=on}}. The ships have an endurance of 60 days without replenishment. The diving support vessels (DSVs) are first of the kind ship, indigenously designed and built at Indian shipyard for the Indian Navy.<ref name="PIB-220922"/><ref name=":3" />

The ship has been designed by HSL with design consultancy from Vik-Sandvik design similar to the {{INS|Dhruv}}, another specialty ship manufactured by HSL.<ref name="AR-2021">{{cite web|url=https://www.hslvizag.in/WriteReadData/userfiles/file/AnnualReports/69AR_2020-21_E.pdf|title=69th Annual Report HSL 2020-21|date=2021-12-27|page=15}}</ref><ref name="NT-220922">{{cite web|url=https://www.naval-technology.com/news/indian-navy-diving-support-vessels/|title=Indian Navy launches two diving support vessels Nistar and Nipun|work=Naval Technology|date=2022-09-20}}</ref><ref>{{cite web|url=https://www.jagranjosh.com/general-knowledge/research-vessel-and-missile-tracking-ship-ins-dhruv-1631107949-1|title=INS Dhruv to be commissioned on September 10 by NSA Doval: All you need to know about the N-missile tracking ship|publisher=Jagran Josh|date=2021-09-08}}</ref>

These ships will be able to perform carry out [[submarine rescue]], [[Deep diving|deep sea diving]] operations along with [[Search and rescue|search and rescue missions]], sustained patrolling and helicopter operations at the sea.<ref name="TH-260918">{{cite news|url=https://www.thehindubusinessline.com/news/navy-inks-contract-with-hindustan-shipyard/article25049216.ece|title= Navy inks contract with Hindustan Shipyard |work=[[The Hindu]]|date=2018-09-26}}</ref>

The ships will be fitted with [[Dynamic Positioning]] System (DP-II) to automatically maintain its position and heading during underwater operations in harsh conditions. Other equipment also includes a six-person [[Decompression chamber|Decompression Chamber]]; a Submersible Decompression Chamber (SDC), or Diving Bell, which is launched through a [[moon pool]] for diver safety; and a [[Self-propelled hyperbaric lifeboat|Self-Propelled Hyperbaric Lifeboat]] (SPHL). Diving vessel carried by the ships include two [[Observation-class]] [[Remotely Operated Vehicle]]s (OROVs) and a [[Deep-submergence rescue vehicle#India|Deep Submergence Rescue Vehicle]] (DSRV) along with a [[helipad]].<ref name=":0" /><ref name=":1" /> The ships are also equipped with [[side-scan sonar]] and 15-tonne subsea crane.<ref name=":3" />

== Construction ==

HSL started the construction activities months after signing the deal. The beleaguered shipyard won this project on a nomination basis to bolster its financial position.<ref name="TH-090219"/> The first ship (Yard-11190) was [[Keel laying|laid down]] on 28 December 2019, a year after signing the deal whilst the keel of the second ship (Yard-11191) was laid down three months later on 23 March 2020.<ref name="AR-1920">{{cite web|url=https://www.hslvizag.in/WriteReadData/userfiles/file/AnnualReports/68AR_2019-20_E.pdf|title=68th Annual Report - 2019/20|work=[[Hindustan Shipyard]]|date=2021-04-10|page=44}}</ref><ref>{{cite web|last=Mazumdar|first=Mrityunjoy|date=2020-01-12|title=India lays down keel for first dive support vessel|url=https://www.janes.com/article/93650/india-lays-down-keel-for-first-dive-support-vessel|archive-url=https://web.archive.org/web/20200131061810/https://www.janes.com/article/93650/india-lays-down-keel-for-first-dive-support-vessel|archive-date=31 January 2020|publisher=Janes}}</ref>

The contract obligated the shipyard to deliver the ships within 36 months from signing the deal but there has been considerably delays owing to the COVID-19 pandemic and subsequent [[COVID-19 lockdown in India|lock down]] in India. Both the ships were concurrently launched on 22 September 2022.<ref name="PIB-220922">{{cite report|title=MRS KALA HARI KUMAR LAUNCHES (YARD 11190 - NISTAR) & (YARD 11191 - NIPUN), DIVING SUPPORT VESSELS AT HINDUSTAN SHIPYARD LTD, VISAKHAPATNAM ON 22 SEP 22|work=[[Press Information Bureau]]|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1861514|date=2022-09-22}}</ref>

A minimum delay of a year was expected with the first ship, which is expected to be delivered in July 2023 while the second ship will be delivered six months later, around January 2024. Owing to this delay, the Indian Navy has released a Request for Information (RFI) to lease a mother ship to operate their [[Deep-submergence rescue vehicle#Indian models|deep-submergence rescue vehicle]] (DSRV).<ref name="SN-260922">{{cite news|url=https://www.shephardmedia.com/news/naval-warfare/indian-navy-beefs-up-diving-support-and-submarine-rescue-capability/|title=Indian Navy beefs up diving support and submarine rescue capability|work=Shephard Media|first=Gordon|last=Arthur|place=[[Christchurch]]|date=2022-09-26 }}</ref>

The ship will have at least 80% indigenous content contributing significantly to the [[Atmanirbhar Bharat]] mission of the Government of India and further bolstered the Indian economy.<ref name="IT-220922">{{cite news|url=https://www.indiatoday.in/india/story/diving-support-vessels-indian-navy-launch-visakhapatnam-2003145-2022-09-21|title=2 Diving Support Vessels of Indian Navy all set to be launched in Visakhapatnam |work=[[India Today]]|first=Manjeet|last=Negi|date=2022-09-22 }}</ref> In addition, the steel used the their construction has been wholly manufactured by [[Steel Authority of India Limited|SAIL]].<ref>{{Cite press release |title=INS Ajay and INS Nistar: Latest Milestones in SAIL’s Strategic Steel Support to Defence Indigenization |date=2025-08-04 |publisher=[[Press Information Bureau]] |url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=2152092 |access-date=2025-08-11}}</ref>

As of December 2022, 46% of the physical construction has been complete on both the ships with deliveries expected to be completed by 2024.<ref name="AR-2122">{{cite web|url=https://www.hslvizag.in/WriteReadData/userfiles/file/AnnualReports/HSL%20English%20Annual%20Report%202021-22.pdf|title=70th Annual Report 2021-22|work=[[Hindustan Shipyard]]|date=2022-12-03|page=10}}</ref>

On 27 May 2024, ''Nistar'' completed its maiden [[sea trials]]. The trials included assessment of the ship's maneuverability, propulsion systems, and onboard equipment.<ref>{{Cite web |last=Team |first=IADN Editorial |date=2024-05-29 |title=Nistar Class DSV aces maiden sea trials - IADN |url=https://iadnews.in/nistar-class-dsv-aces-maiden-sea-trials/ |access-date=2025-04-13 |website=- IADN |language=en-GB}}</ref><ref>{{Cite news |date=2024-05-28 |title=HSL's first warship in three decades sails through maiden sea trials |url=https://www.thehindu.com/news/cities/Visakhapatnam/dsv-vessel-sent-for-sea-trials/article68224958.ece |access-date=2025-02-06 |work=The Hindu |language=en-IN |issn=0971-751X}}</ref><ref>{{Cite web |last=Maritime |first=Baird |date=2024-06-04 |title=Sea trials begin for Indian Navy dive support vessel |url=https://www.bairdmaritime.com/security/naval/naval-auxiliary-support/sea-trials-begin-for-indian-navy-dive-support-vessel |access-date=2025-02-06 |website=Baird Maritime / Work Boat World |language=en}}</ref> Between 24 March and 12 April 2025, the [[Gas blending for scuba diving|air/mix gas diving system]] trials of the ship was completed which included unmanned and manned dives at varying depths as well as trials of its Observation-class Remotely Operated Vehicle (OROV). This will be followed by "saturation diving trials".<ref name=":0">{{Cite news |date=2025-03-24 |title=INS Nistar in its final stages of construction |url=https://www.thehindu.com/news/cities/Visakhapatnam/ins-nistar-in-its-final-stages-of-construction/article69368977.ece |access-date=2025-04-13 |work=The Hindu |language=en-IN |issn=0971-751X}}</ref><ref name=":1">{{Cite web |last=Banerjee |first=Aritra |date=2025-04-12 |title=HSL Completes Key Trials For Indian Navy's Diving Support Vessel 'Nistar' |url=https://www.oneindia.com/india/hsl-completes-key-trials-for-indian-navys-diving-support-vessel-nistar-4122153.html |access-date=2025-04-13 |website=Oneindia |language=en}}</ref>

HSL delivered INS ''Nistar'', with an indigenous content of 80%, to Indian Navy on 8 July 2025.<ref name=":2">{{Cite news |date=2025-07-08 |title=HSL delivers INS Nistar to Navy |url=https://timesofindia.indiatimes.com/city/vijayawada/hsl-delivers-ins-nistar-to-navy/articleshow/122326240.cms |access-date=2025-07-09 |work=The Times of India |issn=0971-8257}}</ref><ref>{{Cite news |date=2025-07-09 |title=First indigenously designed, constructed Diving Support Vessel 'Nistar' delivered to Navy |url=https://economictimes.indiatimes.com/news/defence/first-indigenously-designed-constructed-diving-support-vessel-nistar-delivered-to-navy/articleshow/122342727.cms?from=mdr |access-date=2025-07-09 |work=The Economic Times |issn=0013-0389}}</ref> The ship, nicknamed as "Guardian of the Deep",<ref>{{Cite web |title=Navy Shares Glimpses Of First Homegrown Nistar-Class Diving Support Vessel |url=https://www.ndtv.com/india-news/navy-shares-glimpses-of-first-homegrown-nistar-class-diving-support-vessel-8885274 |access-date=2025-07-17 |website=www.ndtv.com |language=en}}</ref> was commissioned into the [[Eastern Naval Command]] on 18 July 2025.<ref name="PIB-180725">{{cite press release|url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=2145766|title=INS Nistar, first indigenously designed & constructed Diving Support Vessel, commissioned in Vizag in the presence of Raksha Rajya Mantri|work=PIB|date=2025-07-18}}</ref><ref name=":3">{{Cite news |date=2025-06-16 |title=Indian Navy to commission 'Nistar': All you need to know about first indigenous diving support vessel |url=https://www.moneycontrol.com/news/india/indian-navy-to-commission-nistar-all-you-need-to-know-about-first-indigenous-diving-support-vessel-13284884.html |access-date=2025-06-17 |work=Moneycontrol}}</ref>

== Service history ==

=== INS ''Nistar'' ===
On 14 September 2025, INS ''Nistar'' made her maiden port call at [[Changi Naval Base]], [[Singapore]] to participate in Exercise Pacific Reach 2025 (XPR 25) which would start on the next day. The mothership would deploy the Submarine Rescue Unit (East) for the biennial exercise which would be hosted in the [[South China Sea]].<ref>{{Cite press release |title=Indian Naval Ship Nistar enters Changi Naval Base, Singapore to participate in Exercise Pacific Reach 2025 |date=2025-09-15 |publisher=[[Press Information Bureau]] |url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=2166790 |access-date=2025-09-17}}</ref><ref>{{Cite news |last= |first= |date=2025-09-15 |title=INS Nistar makes maiden port call at Singapore for multinational submarine rescue exercise |url=https://www.thehindu.com/news/national/ins-nistar-makes-maiden-port-call-at-singapore-for-multinational-submarine-rescue-exercise/article70053202.ece |access-date=2025-09-16 |work=The Hindu |language=en-IN |issn=0971-751X}}</ref> The exercise included a harbour phase, between 15 and 20 September, where the Indian Navy presented their DSRV philosophy and post-rescue medical preparedness through an international medical symposium.<ref name=":5" />

This was followed by a sea phase from 21 to 25 September. During this phase, two other rescue units were also embarked on {{Ship|MV|Swift Rescue}} of the [[Republic of Singapore Navy]] (RSN) and {{JS|Chiyoda|2016|6}} of the [[Japan Maritime Self-Defense Force]] (JMSDF). The three rescue units and their [[submarine rescue ship]]s operated along with submarines of [[Republic of Korea Navy]], RSN and JMSDF which simulated as Disabled Submarines (DISSUBs). On 23 and 24 September, the DSRV ''Tiger X'' was deployed from ''Nistar'' to rescue {{ROKS|Shin Dol-seok|SS-082}} and {{RSS|Invincible}}, respectively.<ref name=":5">{{Cite press release |title=Indian Navy demonstrates global submarine rescue capability at Exercise Pacific Reach (XPR-25) |date=2025-10-01 |publisher=[[Press Information Bureau]] |url=https://www.pib.gov.in/PressReleasePage.aspx?PRID=2173604 |access-date=2025-10-02}}</ref> Overall, the DSRV conducted mating exercise with three foreign submarines on three consecutive days also marking the Navy's first such exercise. The exercise included ROV operations for over three days. The deployment the Navy's interoperability with foreign maritime forces.<ref>{{Cite web |last=Singh |first=Mayank |date=2025-09-28 |title=Indian Navy completes maiden submarine intervention, rescue exercise in South China Sea |url=https://www.newindianexpress.com/nation/2025/Sep/28/indian-navy-completes-maiden-submarine-intervention-rescue-exercise-in-south-china-sea |access-date=2025-09-29 |website=The New Indian Express |language=en}}</ref><ref>{{Cite tweet |number=1971934353422012891 |user=indiannavy |title=Three Subs Three Mates Three Days… |date=2025-09-27 |access-date=2025-09-29}}</ref> On 25 September, a coordinated rescue drill was hosted by RSN. This was the first "three-asset rescue (R3)" in the history of Pacific Reach. ''Nistar'' led the formation, assisting the other rescue ships by localising and surveying the datum and passing requisite information to ''Swift Rescue'' and ''Chiyoda''. While ''Invincible'' simulated as the DISSUB, India's ROV and DSRV were deployed and the mating was completed within an hour.<ref name=":5" /><ref>{{Cite news |date=2025-10-01 |title=Indian Navy demonstrates global submarine rescue capability at Exercise Pacific Reach |url=https://economictimes.indiatimes.com/news/defence/indian-navy-demonstrates-global-submarine-rescue-capability-at-exercise-pacific-reach/articleshow/124263940.cms?from=mdr |access-date=2025-10-03 |work=The Economic Times |issn=0013-0389}}</ref>

She also participated at the [[International Fleet Review 2026]] held at [[Visakhapatnam]].<ref>{{Cite web |title=IFR & MILAN 2026 |url=https://www.ifrmilan26.com/ |access-date=2026-02-19 |website=IFR & MILAN 2026 |language=en}}</ref> As part of the Harbour Phase, on 19 February 2026, the Indian Navy demonstrated the capabilities of the ship and the DSRV to the naval delegates of friendly foreign countries.<ref>{{Cite tweet |number=2024328196351807897 |user=IN_HQENC |title=As part of the Harbour phase of #MILAN2026, delegates from Friendly Foreign Countries witnessed demonstration of the Deep Submergence Rescue Vehicle (DSRV) onboard #INS_NISTAR. |date=2026-02-19 |access-date=2026-02-21 |archive-url=}}</ref>

== Ships of the class ==
{| class="wikitable"
! Name
! Pennant
! Yard No
! Keel laid
! Launched
! Delivered
! Commissioned
! Home-port
! Status
|-
! colspan="9" |{{navy|India}}
|-
| ''Nistar''
| align='center'|A16
| 11190<ref name="PIB-220922"/>
| 28 December 2019<ref name="AR-1920"/>
| rowspan='2'|22 September 2022<ref name="PIB-220922"/>
| 8 July 2025<ref name=":2" />
|18 July 2025<ref name="PIB-180725"/>
|[[Visakhapatnam]]
|Active
|-
| ''Nipun''
| align='center'|A17
| 11191<ref name="PIB-220922"/>
| 23 March 2020<ref name="AR-1920"/>
|{{n/a}}
|{{n/a}}
| [[Mumbai]]<ref name=":4" />
|Launched
|}

==Gallery==

{{Gallery
|width=160 | height=170
|File:Nistar and Nipun diving support vessels launched at HSL.jpg
|''Nistar'' and ''Nipun'' diving support vessels launched at HSL.
|File:Launch ceremony of Nistar diving support vessel at Hindustan shipyard.jpg
|Launch ceremony of ''Nistar'' and ''Nipun'' at Hindustan shipyard.
|File:Model of Diving support vessles being built at Hindustan shipyard.jpg
|Model of diving support vessels being built at Hindustan shipyard.

}}

== See also ==
* [[List of active Indian Navy ships]]
* [[Future of the Indian Navy]]
* [[Diving support craft (Indian navy)]]

== References ==
{{Reflist|30em}}

{{Ship classes of the Indian Navy}}

[[Category:Ships built in India]]
[[Category:Diving support vessels]]

Nistar-class diving support vessel - Revision history

NXHLillian: Starting first info and citations