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← Older revision		Revision as of 16:37, 11 December 2022
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	{\|{{Infobox ship begin}} <!-- warship classes -->		{\|{{Infobox ship begin}} <!-- warship classes -->
	\|+''Sandhayak'' class		\|+''Sandhayak'' class

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{{Use dmy dates|date=August 2022}}
{{Use Indian English|date=August 2022}}
{|{{Infobox ship begin}} 
|+''Sandhayak'' class
{{Infobox ship image
|Ship image=INS Sandhayak (J-18) survey vessel at sea.jpg
|Ship caption=INS ''Sandhayak'' (J-18) survey vessel at sea.
}}
{{Infobox ship class overview
|Builders=*[[Garden Reach Shipbuilders and Engineers]]
*[[Goa Shipyard|Goa Shipyard, Ltd.]]
|Operators={{flag|India|naval}}
|Class before=
|Class after={{sclass|Makar|survey catamaran|4}}
|Subclasses=
|Built range=
|In commission range=
|Total ships building=
|Total ships planned=8
|Total ships completed=8
|Total ships cancelled=
|Total ships active=6
|Total ships laid up=
|Total ships lost=
|Total ships retired=2
|Total ships scrapped=
|Total ships preserved=
}}
{{Infobox ship characteristics
|Hide header=
|Header caption=
|Ship type= Hydrographic survey ship
|Ship displacement={{convert|1929|LT|t|0}} full
|Ship length={{convert|87.8|m|ftin|abbr=on}}
|Ship beam= {{convert|12.8|m|ftin|abbr=on}}
|Ship draft={{convert|3.3|m|ftin|abbr=on}}
|Ship propulsion=
|Ship speed= {{convert|16|kn|lk=in}}
|Ship range=*{{convert|6000|nmi|abbr=on|lk=in}} at {{convert|14|kn}}
*{{convert|14000|nmi|abbr=on|lk=in}} at {{convert|10|kn|abbr=on}}
|Ship complement=18 officers + 160 enlisted
|Ship armament=1 × [[Bofors 40 mm Automatic Gun L/60|Bofors 40 mm]] gun
|Ship aircraft=1 × [[HAL Chetak]] helicopter
|Ship aircraft facilities=[[Helipad]]
|Ship notes=
}}
|}
The '''''Sandhayak''-class survey ships''' are a series of eight vessels built by [[Garden Reach Shipbuilders and Engineers]] (GRSE), [[Kolkata]] and [[Goa Shipyard|Goa Shipyard, Ltd.]], [[Vasco da Gama, Goa|Vasco]] for the [[Indian Navy]]. While ''Sandhayak'', ''Investigator'', ''Nirdeshak'', ''Nirupak'' were built in GRSE;<ref>{{Cite web|title=GRSE_Coffee Table Book_low.pdf|url=http://grse.gov.in/pdf/GRSE_Coffee%20Table%20Book_low.pdf}}</ref> ''Sarveshak'', ''Jamuna'', ''Darshak'', ''Sutlej'' were built by Goa Shipyard.<ref name="jfs202 p316">Saunders 2002, p. 316.</ref><ref>{{cite web|url=https://psuwatch.com/ins-jamuna-progresses-joint-hydrographic-operations-off-sri-lanka|title=INS Jamuna progresses joint hydrographic operations off Sri Lanka|publisher=PSU Watch|date=2020-02-20}}</ref> The vessels equipped with four survey [[motor boats]], two small [[boats]] and are powered by two diesel engines with a top speed of {{convert|16|kn|lk=in}}. They have a helicopter deck and are also armed with a [[Bofors 40 mm Automatic Gun L/60|Bofors 40 mm/60 gun]] mount for self-defense.

The ships are equipped with variety of next-generation surveying systems fitted onboard including multi-beam swath [[Echo (phenomenon)|echo]] sounding system, differential [[gps]], [[motion sensors]], sea [[gravimeter]], [[magnetometer]], oceanographic [[sensors]], side scan [[sonars]], automated [[data logging]] system, sound velocity profiling system, digital survey and processing system, amongst others.<ref>{{Cite web|title=Indian navy ship on goodwill visit|url=http://www.nation.sc/article.html?id=218680}}</ref>

Working as part of [[Indian Naval Hydrographic Department]] the ''Sandhayak''-class [[survey ship]]s are equipped with a range of surveying, navigational and communication systems. The ships are designed to undertake shallow coastal and deep oceanic hydrographic survey and collect oceanographic and geophysical data required for the production of digital navigational charts and publications. Besides carrying out their primary role of hydrographic survey, they can also assist in times of war and natural calamities as troop transports and casualty holding ships. The ships are also equipped with [[Remotely operated underwater vehicle|ROV]], [[AUV]] & [[Unmanned surface vehicle|USV]].<ref>{{Cite web|title=INS Sarvekshak |url=https://www.hydro-international.com/content/company/ins-sarvekshak}}</ref> Nirdeshak was decommissioned in 2014.<ref>{{Cite web|title=Fortnightly E-News Brief of National Maritime Foundation|url=http://maritimeindia.org/View%20Profile/635570539074764126.pdf}}</ref>

==Service History==
{{INS|Nirdeshak|J19|2}} was decommissioned on 19 December 2014.<ref>{{cite web|url=https://www.newindianexpress.com/states/kerala/2014/dec/20/Survey-ship-Decommissioned-696297.html|title=Survey ship Decommissioned|publisher=New Indian Express|date=2014-12-20}}</ref>

The lead ship of the class {{INS|Sandhayak|J18|2}} was decommissioned on 4 June 2021 after 40 years in service.<ref>{{cite web|url=https://pib.gov.in/PressReleasePage.aspx?PRID=1723980|title=INS Sandhayak to be Decommissioned on 04 Jun 21|publisher=PIB|date=2021-06-03}}</ref>

==Ships in the class==
{| class="wikitable"
|+Ships in the class
|-
!Name !! Pennant No. !! Builder !! Commission !! Decommission !! Homeport !! Status
|-
! colspan=7 | Batch I
|-
|{{INS|Sandhayak|J18|2}} || J 18 || rowspan='4'| [[Garden Reach Shipbuilders & Engineers|GRSE]] || 14 March 1981 || 4 June 2021 || rowspan='3'|[[Visakhapatnam]]|| rowspan='2'|Decommissioned
|-
|{{INS|Nirdeshak|J19|2}} || J 19 || 4 October 1982 || 19 December 2014
|-
|{{INS|Nirupak|J20|2}} || J 20 || 14 August 1985 || || rowspan='2'|Active
|-
|{{INS|Investigator|J15|2}} || J 15 || 11 January 1990 || || [[Kochi]]<ref>{{cite news |title=Kochi to be home for survey ship INS Investigator |url=https://english.manoramaonline.com/news/nation/2019/05/29/kochi-to-be-home-for-survey-ship-ins-investigator.html |work=OnManorama |date=30 May 2019 |language=en}}</ref>
|-
! colspan=7 | Batch II
|-
|{{INS|Jamuna|J16|2}} || J 16 || rowspan='4'| [[Goa Shipyard Limited]] || 31 August 1991 || ||rowspan='2'|[[Kochi]] ||rowspan='4'|Active
|-
|{{INS|Sutlej|J17|2}} || J 17 || 19 February 1993 ||
|-
|{{INS|Darshak|J21|2}}|| J 21 || 28 April 2001 || || [[Visakhapatnam]]<ref>{{Cite web|url=http://www.mid-day.com/articles/navy-deserter-caught-at-the-mumbai-airport/16646164|title=Navy deserter caught at the Mumbai airport|website=mid-day|access-date=2016-06-09}}</ref>
|-
|{{INS|Sarvekshak|J22|2}} || J 22 || 14 January 2002 || || [[Kochi]]<ref>{{Cite news|url=http://www.thehindu.com/news/cities/Kochi/kashmir-students-arrive-in-kochi-on-a-goodwill-visit/article2464739.ece|title=Kashmir students arrive in Kochi on a goodwill visit|date=2011-09-18|newspaper=The Hindu|language=en-IN|issn=0971-751X|access-date=2016-06-09}}</ref>
|}

==Gallery==

{{Gallery
|title=
|width=160 | height=170
|File:INS Sandhayak (J-18) at sea.jpg
|{{INS|Sandhayak|J18|6}} at sea.
|File:J19 Survey INS.jpg
|{{INS|Nirdeshak|J19|6}} during a survey mission.
|File:Survey tasking being undertaken by Southern Naval Command ships on World Hydrographic Day 2014.jpg
|Survey tasking being undertaken by [[Southern Naval Command]] ships {{INS|Jamuna|J16|6|}} and {{INS|Sarvekshak|J22|6}} on [[World Hydrography Day]] 2014.
|File:INS Sarvekshak (J22) en-route to Mauritius.jpg
|{{INS|Sarvekshak|J22|6}} en-route to [[Mauritius]]
}}

==See also==
*[[List of active Indian Navy ships]]
*{{INS|Sagardhwani}}

==References==
{{Reflist}}

*{{cite book|last=Saunders|first=Stephen |title=Jane's Fighting Ships 2002–2003 |year=2002 |publisher=Jane's Information Group |location=Coulsdon, UK|isbn=0-71062-4328}}

==External links==
{{commons category|Sandhayak class survey ship}}
*{{cite web |url=http://www.globalsecurity.org/military/world/india/j-sandhayak.htm |title=J 18 Sandhayak class |website=GlobalSecurity}}
*{{cite web |url=http://www.indiannavy.nic.in/naval-fleet/sandhayak-class |title=Sandhayak class |website=[[Indian Navy]] |url-status=dead |archiveurl=https://web.archive.org/web/20130729210948/http://www.indiannavy.nic.in/naval-fleet/sandhayak-class |archivedate=29 July 2013 |df=dmy-all }}

{{external media|topic=Sandhayak class survey ship |align=right|width=200px
|image1=[http://indiannavy.nic.in/sites/default/files/J-18_Sandhayak_1-S.JPG INS ''Sandhayak'']
|image2=[http://www.globalsecurity.org/military/world/india/images/j-17_sandhayak_sutlej_india-navy01.jpg INS ''Sutlej'']
|image3=[http://www.globalsecurity.org/military/world/india/images/darshak_25a.jpg INS ''Darshak'']
|}}

{{Sandhayak-class survey ship}}
{{Ship classes of the Indian Navy}}

[[Category:Sandhayak-class survey ships| ]]
[[Category:Survey ships of the Indian Navy]]
[[Category:Auxiliary research ship classes]]

Sandhayak-class survey ship (1981) - Revision history

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