Mystic class is a class of Deep-Submergence Rescue Vehicles (DSRVs), designed for rescue operations on submerged, disabled submarines of the United States Navy or foreign navies. The two submarines of the class were never used for this purpose, and were replaced by the Submarine Rescue Diving Recompression System.
The Deep Submergence Insignia is a uniform breast pin worn by officers, both men and women of the United States Navy's submarine service who are qualified in submarines and have completed one year of regular assignment to a crewed or uncrewed deep submersible. The badge was first approved on 6 April 1981.
A deep-submergence vehicle (DSV) is a deep-diving crewed submersible that is self-propelled. Several navies operate vehicles that can be accurately described as DSVs. DSVs are commonly divided into two types: research DSVs, which are used for exploration and surveying, and DSRVs, which are intended to be used for rescuing the crew of a sunken navy submarine, clandestine (espionage) missions, or both. DSRVs are equipped with docking chambers to allow personnel ingress and egress via a manhole.
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.
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 exports the ships that the company builds.
A submarine rescue ship is a surface support ship for submarine rescue and deep-sea salvage operations. Methods employed include the McCann Rescue Chamber, deep-submergence rescue vehicles (DSRV's) and diving operations.
INS Sindhukirti (S61) is the seventhSindhughosh-class diesel-electric submarine of the Indian Navy. She was built at the Admiralty Shipyard and Sevmash in the Soviet Union.
The Cheonghaejin class is a submarine rescue ship class of the Republic of Korea Navy. Only one ship has been built in the class, ROKS Cheonghaejin, in 1995. Its operations include rescuing trapped sailors in submarines, naval operation support for submarines, underwater research and mapping support, and recovery of sunk vessels. It is equipped with a deep submergence rescue vehicle (DSRV) that operates up to 500 metres (1,600 ft), and a rescue chamber that holds up to nine people.
Reliance Naval and Engineering Limited (R-Naval), formerly known as Reliance Defence & Engineering Limited and prior to that as Pipavav Shipyard Limited and Pipavav Defence & Offshore Engineering Company Limited is an Indian shipbuilding and heavy industry company headquartered in Mumbai. The shipyard is located in Pipavav, Gujarat, at a distance of 90 km South of Amreli, 15 km South of Rajula and 140 km South West of Bhavnagar. R-Naval is the first private sector company in India to obtain a license and contract to build warships. Pipavav is the largest shipyard in India.
Hindustan Shipyard Limited (HSL) is a shipyard located in Visakhapatnam on the east coast of India.
INS Nireekshak (A15) (Inspector) is a diving support vessel (DSV) of Indian Navy. It can also function as interim submarine rescue vessel (SRV).
The Anti-Submarine Warfare Shallow Water Craft (ASW-SWC) corvettes, are a class of anti-submarine warfare (ASW) vessels currently being built for the Indian Navy, by Cochin Shipyard (CSL) and Garden Reach Shipbuilders & Engineers (GRSE). They were conceived as a replacement to the ageing Abhay-class corvettes of the Indian Navy, and are designed to undertake ASW duties – including subsurface surveillance in littoral waters, search-and-attack unit (SAU) missions and coordinated anti-submarine warfare operations with naval aircraft. They were also designed to provide secondary duties – including defense against intruding aircraft, minelaying and search-and-rescue (SAR).
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 November 2023, the Indian Navy had 67 vessels of various types under construction including destroyers, frigates, corvettes, conventional-powered and nuclear-powered submarines and various other ships. It plans to build up to a total of 200 vessels and 500 aircraft by 2050. According to the Chief of the Naval Staff's statement in December 2020, India has transformed from a buyer's navy to a builder's navy.
Next Generation Missile Vessels (NGMVs) are a planned class of anti-surface warfare corvettes for the Indian Navy. Under this programme the Indian Navy intends to acquire six advanced missile vessels. Ships in this class will be armed with Anti-ship missile or Land-attack missile like BrahMos. Ships under this class will feature advanced stealth features like a low radar cross section (RCS), infrared, acoustic and magnetic signatures.
The Indian Navy Swimmer Delivery Vehicle (SDV), also known as Special Operations Vessels (SOV) is a planned class of midget submarine for the Indian Navy. Under this programme the Indian Navy will acquire at least 5 midget submarines for use as Swimmer Delivery Vehicles. These submarines will be used for conducting underwater special operations by MARCOS.
The IRS class of tugboats are a series of Bollard pull tugboats built by Hindustan Shipyard Limited, Visakhapatnam, for the Indian Navy.
The HSL-class fleet support vessels are a series of five fleet tanker planned to be built by Hindustan Shipyard (HSL), Visakhapatnam and Larsen & Toubro at Kattupalli Shipyard for the Indian Navy. The deal was signed on 25 August 2023 with an expected project completion timeline of 8 years. These ships will be an indigenous design by the Hindustan Shipyard's in-house design team. The primary role of the vessels would be to replenish ships of the Indian Navy with fuel, food and various other supplies. With a length of 230 m and displacement of 45,000 tonnes, these will be the heaviest and the second largest vessels to be in operation in the Indian Navy fleets before 2030.
Submarine rescue is the process of locating a sunk submarine with survivors on board, and bringing the survivors to safety. This may be done by recovering the vessel to the surface first, or by transferring the trapped personnel to a rescue bell or deep-submergence rescue vehicle to bring them to the surface. Submarine rescue may be done at pressures between ambient at depth, and sea level atmospheric pressure, depending on the condition of the distressed vessel and the equipment used for the rescue. Self-rescue of submarine personnel by buoyant free ascent at ambient pressure is considered submarine escape. Survivors may require recompression treatment for decompression illness.
The Next-Generation Offshore Patrol Vessel(NGOPV) are a series of eleven offshore patrol vessel planned to be built by Goa Shipyard (GSL) and Garden Reach Shipbuilders & Engineers (GRSE) for the Indian Navy. The deal was signed on 30 March 2023 with the delivery of the ships is scheduled to commence from September 2026. The primary role of the vessels to maintain Indian Navy's combat capability and meet various operational requirements such as Anti piracy, Counter-Infiltration, Anti poaching, Anti trafficking, Non combatant evacuation operations, Search and Rescue (SAR), Protection of Offshore Assets and Mine warfare.
Nistar and Nipun diving support vessels launched at HSL.
Launch ceremony of Nistar and Nipun at Hindustan shipyard.
Model of diving support vessels being built at Hindustan shipyard.
Indian Navy 
