INS Darshak (J21) is a hydrographic survey ship in the Indian Navy, under the Eastern Naval Command.
Mazagon Dock Shipbuilders Limited (MDL), formerly called Mazagon Dock Limited, is a shipyard situated in Mazagaon, Mumbai. It manufactures warships and submarines for the Indian Navy and offshore platforms and associated support vessels for offshore oil drilling. It also builds tankers, cargo bulk carriers, passenger ships and ferries.
INS Sagardhwani (A74) 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.
Kora-class corvettes are 1,350-tonne guided missile corvettes, in active service with the Indian Navy and the National Coast Guard of Mauritius. Four vessels were built at Garden Reach Shipbuilders and Engineers (GRSE) and outfitted at Mazagon Dock Limited (MDL).
The Car Nicobar class of high-speed offshore patrol vessels are built by Garden Reach Shipbuilders and Engineers (GRSE) for the Indian Navy. The vessels are designed as a cost-effective platform for patrol, anti-piracy and rescue operations in India's exclusive economic zone.
The Abhay-class corvettes of the Indian Navy are customized variants of the Soviet Pauk-class corvettes. The class is primarily intended for coastal patrol and anti-submarine warfare.
INS Jamuna (J16) is a hydrographic survey ship in the Indian Navy, under the Southern Naval Command. Jamuna is equipped with a helicopter, a Bofors 40 mm gun, four survey motor boats, and two small boats. The ship has the distinction of being associated with relief work in the wake of the Gujarat earthquake, Tsunami 2004, as well as Operation Vijay during the Kargil war. Jamuna was also awarded a Mention in Dispatches.
The Makar-class survey catamarans are a series of six 500 ton steel hull/aluminium superstructure Hydrographic Survey Catamarans being built by Alcock Ashdown (Gujarat) Ltd at its Bhavnagar shipyard for the Indian Navy. The ships are designed by an Australian naval architecture firm Sea Transport Solutions, which is based on Queensland's Gold Coast. The deal is likely to be canceled due to the delays as the Navy is not satisfied with the timeline and a fresh award for construction of another class of survey vessels to the GRSE has also been undertaken.
The ABG class of cadet training ships is a series of three vessels being built by the ABG Shipyard in Gujarat for the Indian Navy.
INS Makar (J31) is the lead ship of Makar-class of survey catamarans used for hydrographic survey by the Indian Navy. It was built indigenously in India by Alcock Ashdown Limited, Gujarat.
The Indian Navy has been focusing on developing indigenous platforms, systems, sensors and weapons as part of the nation's modernisation and expansion of its maritime forces. As of 2020 the Indian Navy has 43 vessels of various types under construction, including an aircraft carrier; destroyers; frigates; corvettes; and conventional-powered and nuclear-powered submarines and plans to build a strong navy of 200 vessels and 500 aircraft by 2050. In 2013 a senior naval official outlined the Indian Navy's intention to build a 200 ship navy over a 10-year period. According to Chief of Naval Staff's statement in December 2020, India has transformed from a buyer's navy to a builder's navy. All 41 ships under construction are being produced in Indian shipyards, both publicly and privately owned. However some projects have suffered from long delays and cost overruns.
INS Sarvekshak (J22) is a hydrographic survey ship in the Indian Navy, under the Southern Naval Command. Apart from a helicopter and Bofors 40 mm gun, the ship is also equipped with four survey motor boats, two small boats. The ship was awarded the runner-up trophy in the 2015 Innovation Trophy awards given out on Navy Day as an operational unit by Prime Minister Narendra Modi. The award was given for developing an innovative solution for tidal measurement during hydrological surveys by use of land based terrain mapping equipment and floating buoys mounted with prisms. The award was accepted by Captain Rajesh Bargoti, the commanding officer of INS Sarvekshak.
INS Sandhayak (J18) is the lead ship of the Sandhayak class of survey ships. The ship operates as a hydrographic survey ship in the Indian Navy, under the Eastern Naval Command. 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.
INS Nirupak (J20) is a Sandhayak-class hydrographic survey ship in the Indian Navy. The ship was built by Garden Reach Shipbuilders & Engineers and commissioned into the Indian navy at Visakhapatnam naval base in 1985 under Eastern Naval Command.
INS Investigator (J15) is the fourth ship in the Sandhayak class, and operates as a hydrographic survey ship in the Indian Navy's Southern Naval Command. Investigator is equipped to prepare marine charts and electronic maps for the Electronic Chart Display and Information System (ECDIS). It can provide humanitarian aid and disaster-management support, and can be quickly converted into a hospital ship; the ship is equipped with an operating theater and associated equipment to deal with medical emergencies at sea.
INS Nirdeshak (J19) was the sixth ship of the Sandhayak class of the Indian Navy. The ship operated as a hydrographic survey ship in the Indian Navy, under the Eastern Naval Command. Nirdeshak was equipped to prepare a variety of marine charts and maps for Electronic Chart Display and Information ECDIS system. The ship's secondary role was to conduct humanitarian aid and disaster management operations, wherein the ship could be converted into a hospital ship. The ship was also equipped with an operating theater and associated equipment needed to attend to medical emergencies at sea.
INS Sutlej (J17) is a hydrographic survey ship of the Sandhayak class in the Indian Navy, under the Southern Naval Command. Like other ships of the same class, this ship is also equipped with an Operating Theater and associated equipment needed to attend to medical emergencies at sea.
Sankalp-class offshore patrol vessels are a series of two offshore patrol vessels designed and built by Goa Shipyard Limited for the Indian Coast Guard. The vessels, also classified as Advanced Offshore Patrol Vessels, are the largest vessels constructed by Goa Shipyard Limited. Samarth class and Saryu class were derived from this class of offshore patrol vessels.
The GRSE-class survey vessels are a series of four survey vessels planned to be built by Garden Reach Shipbuilders and Engineers (GRSE), Kolkata for the Indian Navy. The first vessel is expected to be commissioned by 2021. The primary role of the vessels would be to conduct coastal and deep-water hydro-graphic survey of ports, navigational channels, Economic Exclusive Zones and collection of oceanographic data for defence. Their secondary role would be to perform search & rescue, ocean research and function as hospital ships for casualties.
INS Sandhayak at sea.
INS Nirdeshak during a survey mission.
Survey tasking being undertaken by Southern Naval Command ships INS Jamuna and INS Sarvekshak on World Hydrography Day 2014.
INS Sarvekshak en-route to Mauritius
India 
