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{{Use dmy dates|date=July 2019}}
{{Use Indian English|date=July 2019}}
{|{{Infobox ship begin}}
{{Infobox ship image
| Ship image= INS Sagardhwani (A74).jpg
| Ship caption=INS ''Sagardhwani'' (A74)
}}
{{Infobox ship career
| Hide header=
| Ship country=India
| Ship flag={{shipboxflag|India|naval}}
| Ship name=INS ''Sagardhwani''
| Ship namesake=
| Ship ordered=
| Ship awarded=
| Ship builder=[[Garden Reach Shipbuilders & Engineers]], [[Kolkata]]
| Ship original cost=
| Ship yard number=
| Ship way number=
| Ship laid down=
| Ship launched=May 1991
| Ship sponsor=
| Ship christened=
| Ship completed=
| Ship acquired=
| Ship commissioned=30 July 1994
| Ship decommissioned=
| Ship in service=
| Ship out of service=
| Ship renamed=
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| Ship refit=
| Ship struck=
| Ship reinstated=
| Ship homeport=[[Kochi]], India
| Ship identification=*{{IMO Number|8802818}}
*[[Maritime call sign|Callsign]]: VVXQ
| Ship motto=
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| Ship honours=
| Ship fate=
| Ship status={{shipactive}}
| Ship notes=
| Ship badge=[[File:INS Sagardhwani emblem.jpg|150px|INS Sagardhwani]]
}}
{{Infobox ship characteristics
| Hide header=
| Header caption=
| Ship class=
| Ship type=[[Research ship]]
| Ship tonnage=
| Ship displacement={{Convert|2050|LT|t|0|lk=on|abbr=on}} full load<ref name="rakshak">{{cite web |url= http://www.bharat-rakshak.com/NAVY/Ships/Active/155-INS-Sagardhwani.html |title=INS ''Sagardhwani'' |first=Bharat |last=Rakshak |work=bharat-rakshak.com |year=2012 |access-date=21 January 2012}}</ref>
| Ship length= {{Convert|85.1|m|abbr=on}} [[Length overall|o/a]]<ref name="indiannavy">{{cite web |url=http://indiannavy.nic.in/survey_sdhwani.htm |title=Sagardhwani Class |work=Indian Navy |year=2011 |access-date=21 January 2012 |url-status=dead |archive-url=https://web.archive.org/web/20120202040830/http://indiannavy.nic.in/survey_sdhwani.htm |archive-date=2 February 2012 }}</ref>
| Ship beam={{Convert|12.8|m|abbr=on}}<ref name="indiannavy"/>
| Ship height=
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| Ship ramps=
| Ship ice class=
| Ship power=
| Ship propulsion=*2 × diesel engines
*{{Convert|3860|hp|abbr=on}} sustained
*2 shafts
*2 auxiliary thrusters<ref name="rakshak"/>
| Ship speed={{Convert|16|kn}}<ref name="rakshak"/>
| Ship range={{Convert|6000|nmi|km|abbr=on}} at {{Convert|16|kn|abbr=on}}<ref name="rakshak"/>
| Ship boats=
| Ship capacity=
| Ship troops=
| Ship complement=80, plus 16 scientists<ref name="rakshak"/>
| Ship endurance= 200 days<ref name="timesofindia.indiatimes.com">{{cite web|title=INS Sagardhwani: DRDO's pet and Navy's pride|website= [[The Times of India]]|url= http://timesofindia.indiatimes.com/city/bengaluru/INS-Sagardhwani-DRDOs-pet-and-Navys-pride/articleshow/167573.cms}}</ref>
| Ship crew=
| Ship time to activate=
| Ship sensors=Racal Decca 1629 radar at I-band frequency<ref name="rakshak"/>
| Ship EW=
| Ship armament=
| Ship armour=
| Ship armor=
| Ship aircraft=1 × [[HAL Chetak]]<ref name="rakshak"/>
| Ship aircraft facilities=Helicopter landing pad<ref name="rakshak"/>
| Ship notes=
}}
|}
'''INS ''Sagardhwani'' (A74)''' ([[Hindi]] : सागरध्वनि) is a marine acoustic research ship (MARS) owned by the [[Naval Physical and Oceanographic Laboratory]] (NPOL), a [[DRDO]] [[laboratory]] and is maintained and operated by the [[Indian Navy]], and based at [[Southern Naval Command]], [[Kochi]].<ref name="nrbdrdo">{{cite web |url= http://www.nrbdrdo.res.in/npol.html |title=INS Sagardhwani |work=Naval Research Board |year=2010 |access-date=21 January 2012}}</ref>
[[File:Sagardhwani.jpg|thumb|INS Sagardhwani in Kochi on the occasion of Navy Day in 2020]]

The ship was built by [[Garden Reach Shipbuilders & Engineers]], [[Kolkata]],<ref name="nrbdrdo"/> launched in May 1991,<ref name="rakshak"/> and commissioned in 1994.<ref name="nrbdrdo"/> It is similar in design to the [[Sandhayak-class survey ships|''Sandhayak''-class survey ships]], but with the superstructure positioned amidships and a [[helipad]] forward.<ref name="rakshak"/> The vessel is designed to facilitate low noise and low vibration while carrying out [[acoustics|acoustic]] programmes. It has floating floors for scientific laboratories, anti-vibration mountings for machinery and equipment, balloon launching container and wind weather radar to carry out those experiments. It is also equipped with [[VHF]] sets, marine radio and auto telephone exchange.<ref name="timesofindia.indiatimes.com">{{cite web|title=INS Sagardhwani: DRDO's pet and Navy's pride|website= [[The Times of India]]|url= http://timesofindia.indiatimes.com/city/bengaluru/INS-Sagardhwani-DRDOs-pet-and-Navys-pride/articleshow/167573.cms}}</ref>

Internally, the ship has eight laboratories for various scientific disciplines, and a mini-operating theatre with medical staff. At the stern is handling equipment for mooring and retrieving oceanographic and acoustic buoys. It can accommodate up to 82 persons, including 16 scientists, and a crew of 8 officers and 58 sailors.<ref>{{cite web |url= http://articles.timesofindia.indiatimes.com/2003-09-05/bangalore/27176369_1_scientific-equipment-vessel-laboratories |archive-url= https://web.archive.org/web/20131110035559/http://articles.timesofindia.indiatimes.com/2003-09-05/bangalore/27176369_1_scientific-equipment-vessel-laboratories |url-status= dead |archive-date= 10 November 2013 |title=INS Sagardhwani: DRDO's pet and Navy's pride |first=Krishnan M. |last=Anantha |work=[[The Times of India]] |date=5 September 2003 |access-date=21 January 2012}}</ref>

==See also==
*[[List of active Indian Navy ships]]

==References==
{{Reflist}}

==External links==
{{Commons category-inline}}

{{Ship classes of the Indian Navy}}

{{DEFAULTSORT:Sagardhwani, INS}}
[[Category:Auxiliary ships of the Indian Navy]]
[[Category:Research vessels of India]]
[[Category:Ships built in India]]
[[Category:1991 ships]]

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INS Sagardhwani A74 - Revision history

Bot at 08:23, 22 October 2022