INS ''Sandhayak'' (J18)(

Hindi Hindi (Devanāgarī: or , ), or more precisely Modern Standard Hindi (Devanagari: ), is an Indo-Aryan language spoken chiefly in the Hindi Belt region encompassing parts of northern, central, eastern, and western India. Hindi has been de ...

: संधायक lit. coordinator) was the lead ship of the of

survey ship A survey vessel is any type of ship or boat that is used for underwater surveys, usually to collect data for mapping or planning underwater construction or mineral extraction. It is a type of research vessel, and may be designed for the purpo ...

s. The ship operates as a hydrographic survey ship in the

Indian Navy The Indian Navy is the maritime branch of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Navy. The Chief of Naval Staff, a four-star admiral, commands the navy. As a blue-water navy, it operates sig ...

, under the

Eastern Naval Command The Eastern Naval Command is one of the three command-level formations of the Indian Navy. It is headquartered in Visakhapatnam, Andhra Pradesh. The command is responsible for the all naval forces in the Bay of Bengal and parts of the Indian Ocea ...

. Apart from a helicopter and Bofors 40 mm gun for self defence, the ship is also equipped with four survey motor boats, two small boats. The ship can also analyse the level of pollution, sea level at various places, sea bed and marine wealth. ''Sandhayak'' is capable of conducting shallow coastal and deep oceanic hydrographic survey and collect oceanographic and geophysical data. The ship was decommissioned on 4 June 2021 after 40 years in service.

Ship history

Built by

Garden Reach Shipbuilders & Engineers Garden Reach Shipbuilders & Engineers Ltd, abbreviated as GRSE, is one of India's leading shipyards, located in Kolkata. It builds and repairs commercial and naval vessels. GRSE also builds export ships. Founded in 1884 as a small privately-o ...

and commissioned into the Naval service at

Visakhapatnam , image_alt = , image_caption = From top, left to right: Visakhapatnam aerial view, Vizag seaport, Simhachalam Temple, Aerial view of Rushikonda Beach, Beach road, Novotel, Novotel Visakhapatnam, INS Kursura (S20), INS ...

naval base in 2001, ''Sandhayak'' is actually the Indian Navy's fifth

hydrographic survey Hydrographic survey is the science of measurement and description of features which affect maritime navigation, marine construction, dredging, offshore oil exploration/offshore oil drilling and related activities. Strong emphasis is placed ...

ship in the series

indigenous Indigenous may refer to: *Indigenous peoples *Indigenous (ecology), presence in a region as the result of only natural processes, with no human intervention *Indigenous (band), an American blues-rock band *Indigenous (horse), a Hong Kong racehorse ...

ly designed and constructed. ''Sandhayak'' is equipped with a range of

surveying Surveying or land surveying is the technique, profession, art, and science of determining the terrestrial two-dimensional or three-dimensional positions of points and the distances and angles between them. A land surveying professional is ca ...

, navigational, and communication systems. The next-generation surveying systems provided onboard include multi-beam swath

echo In audio signal processing and acoustics, an echo is a reflection of sound that arrives at the listener with a delay after the direct sound. The delay is directly proportional to the distance of the reflecting surface from the source and the list ...

sounding system, differential

global positioning system The Global Positioning System (GPS), originally Navstar GPS, is a satellite-based radionavigation system owned by the United States government and operated by the United States Space Force. It is one of the global navigation satellite sy ...

motion sensors Motion detection is the process of detecting a change in the position of an object relative to its surroundings or a change in the surroundings relative to an object. It can be achieved by either mechanical or electronic methods. When it is done by ...

, sea

gravimeter Gravimetry is the measurement of the strength of a gravitational field. Gravimetry may be used when either the magnitude of a gravitational field or the properties of matter responsible for its creation are of interest. Units of measurement Gr ...

magnetometer A magnetometer is a device that measures magnetic field or magnetic dipole moment. Different types of magnetometers measure the direction, strength, or relative change of a magnetic field at a particular location. A compass is one such device, o ...

, oceanographic sensors, side scan sonars and an automated data logging system as well as Digital Survey and Processing System, sound velocity profiling system among others. The equipment allow the ship to meet the stringent international/

ISO 9002 ISO is the most common abbreviation for the International Organization for Standardization. ISO or Iso may also refer to: Business and finance * Iso (supermarket), a chain of Danish supermarkets incorporated into the SuperBest chain in 2007 * Iso ...

digital survey accuracy standards required for the production of electronic navigation charts and publications as laid down by the

International Hydrographic Organization The International Hydrographic Organization (IHO) is an intergovernmental organisation representing hydrography. , the IHO comprised 98 Member States. A principal aim of the IHO is to ensure that the world's seas, oceans and navigable waters a ...

. ''Sandhayak'' is powered by two diesel engines and is capable of sustained speeds and can also undertake a variety of tasks including rescue operations. In March 2017 in a rare case of

insubordination Insubordination is the act of willfully disobeying a lawful order of one's superior. It is generally a punishable offense in hierarchical organizations such as the armed forces, which depend on people lower in the chain of command obeying orders ...

and

indiscipline ''Discipline'' is the eighth studio album by English progressive rock band King Crimson, released on 22 September 1981 by E.G. Records in the United Kingdom and by Warner Bros. Records in the United States. This album was King Crimson's firs ...

sailors A sailor, seaman, mariner, or seafarer is a person who works aboard a watercraft as part of its crew, and may work in any one of a number of different fields that are related to the operation and maintenance of a ship. The profession of the s ...

were airlifted from the ship while it was conducting

training Training is teaching, or developing in oneself or others, any skills and knowledge or Physical fitness, fitness that relate to specific practicality, useful Competence (human resources), competencies. Training has specific goals of improving on ...

session off the coast of

Paradip Paradeep, also spelt Paradip (originally Paradweep, also spelt Paradwip), is a major seaport city and municipality, from Jagatsinghpur city in Jagatsinghpur district of Odisha, India. Paradeep Municipality was constituted as an NAC on 27 Sep ...

Odisha Odisha (English: , ), formerly Orissa ( the official name until 2011), is an Indian state located in Eastern India. It is the 8th largest state by area, and the 11th largest by population. The state has the third largest population of ...

in the

Bay of Bengal The Bay of Bengal is the northeastern part of the Indian Ocean, bounded on the west and northwest by India, on the north by Bangladesh, and on the east by Myanmar and the Andaman and Nicobar Islands of India. Its southern limit is a line between ...

Survey Task

The primary task of ''Sandhayak'' includes hydrographic surveys,

nautical chart A nautical chart is a graphic representation of a sea area and adjacent coastal regions. Depending on the scale of the chart, it may show depths of water and heights of land (topographic map), natural features of the seabed, details of the coa ...

preparation, with

cartography Cartography (; from grc, χάρτης , "papyrus, sheet of paper, map"; and , "write") is the study and practice of making and using maps. Combining science, aesthetics and technique, cartography builds on the premise that reality (or an im ...

and training. ''Sandhayak'' is also equipped with ROV, AUV & USV. In 2013 ''Sandhayak'' conducted hydrographical survey of the Islands of

Andaman & Nicobar The Andaman and Nicobar Islands is a union territory of India consisting of 572 islands, of which 37 are inhabited, at the junction of the Bay of Bengal and the Andaman Sea. The territory is about north of Aceh in Indonesia and separated fro ...

to update charts, as the seabed in the area has undergone drastic hydrological changes with regard to coastal, underwater profile after the

2004 Tsunami An earthquake and a tsunami, known as the Boxing Day Tsunami and, by the scientific community, the Sumatra–Andaman earthquake, occurred at 07:58:53 local time (UTC+7) on 26 December 2004, with an epicentre off the west coast of northern Suma ...

In 2015 ''Sandhayak'' was used to conduct a search of the sea floor of the missing

Dornier 228 The Dornier 228 is a twin-turboprop STOL utility aircraft, designed and first manufactured by Dornier GmbH (later DASA Dornier, Fairchild-Dornier) from 1981 until 1998. Two hundred and forty-five were built in Oberpfaffenhofen, Germany. In 19 ...

of the

Indian Coast Guard The Indian Coast Guard (ICG) is a maritime law enforcement and search and rescue agency of India with jurisdiction over its territorial waters including its contiguous zone and exclusive economic zone. The Indian Coast Guard was formally esta ...

and was successful in detecting the beacon signals of the missing aircraft. In 2016 ''Sandhayak'' conducted a survey off the coast of

Rameswaram Rameswaram (; also transliterated as Ramesvaram, Rameshwaram) is a municipality in the Ramanathapuram district of the Indian state of Tamil Nadu. It is on Pamban Island separated from mainland India by the Pamban channel and is about 40 kilo ...

in a bid to find a new seaway that will allow larger ships to traverse the narrow

Palk Strait The Palk Strait ( ta, பாக்கு நீரிணை ''Pākku Nīriṇai'', si, පෝක් සමුද්‍ර සන්ධිය ''Pok Samudra Sandhiya'') is a strait between the Tamil Nadu state of India and the Jaffna Distric ...

References

{{DEFAULTSORT:Sandhayak, INS 1977 ships Sandhayak-class survey ships Ships built in India