K-141 Kursk was an Oscar II-class nuclear-powered cruise missile submarine of the Russian Navy. On 12 August 2000, K-141 Kursk was lost when it sank in the Barents Sea, killing all 118 personnel on board.
Alvin (DSV-2) is a crewed deep-ocean research submersible owned by the United States Navy and operated by the Woods Hole Oceanographic Institution (WHOI) in Woods Hole, Massachusetts. The vehicle was built by General Mills' Electronics Group in Minneapolis, Minnesota. Named to honor the prime mover and creative inspiration for the vehicle, Allyn Vine, Alvin was commissioned on June 5, 1964. The submersible is launched from the deep submergence support vessel RV Atlantis (AGOR-25), which is also owned by the U.S. Navy and operated by WHOI. The submersible has made more than 5,000 dives, carrying two scientists and a pilot, to observe the lifeforms that must cope with super-pressures and move about in total darkness, as well as exploring the wreck of Titanic. Research conducted by Alvin has been featured in nearly 2,000 scientific papers.
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.
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.
The nuclear-powered Project 949A Antey submarine K-141 Kursk sank in an accident on 12 August 2000 in the Barents Sea. It was taking part in the first major Russian naval exercise in more than 10 years. All 118 personnel on board were killed. The crews of nearby ships felt an initial explosion and a second, much larger explosion, but the Russian Navy did not realise that an accident had occurred and did not initiate a search for the vessel for over six hours. The submarine's emergency rescue buoy had been intentionally disabled during an earlier mission and it took more than 16 hours to locate the submarine, which rested on the ocean floor at a depth of 108 m (354 ft).
AS-28 is a Priz-class deep-submergence rescue vehicle of the Russian Navy, which entered service in 1986. It was designed for submarine rescue operations by the Lazurit Design Bureau in Nizhny Novgorod. It is 13.5 m (44 ft) long, 5.7 m (19 ft) high, and can operate up to a depth of 1,000 m (3,300 ft).
The Scorpio is a brand of underwater submersible Remotely Operated Vehicle (ROV) manufactured by Perry Tritech used by sub-sea industries such as the oil industry for general operations, and by the Royal Navy and the United States Navy for submarine rescue services. Originally developed by AMETEK Straza of El Cajon, United States, they were subsequently developed by Perry Tritech. Although the design of the original Scorpio is over several decades old, it forms the basis for a current generation of Scorpio-branded ROVs. Scorpio ROVs are named in a sequence following the order of manufacture, such as "Scorpio 17" or "Scorpio 45" which refer to specific ROVs.
AS-34 is a Russian Priz-class deep-submergence rescue vehicle, or rescue mini-submarine, which went into service in 1989.
A deep-submergence rescue vehicle (DSRV) is a type of deep-submergence vehicle used for rescue of downed submarines and clandestine missions. While DSRV is the term most often used by the United States Navy, other nations have different designations for their vehicles.
DSRV-1Mystic is a deep-submergence rescue vehicle that is rated to dive up to 5,000 feet. It was built by Lockheed for the US Navy at a construction cost of $41 million and launched 24 January 1970. It was declared fully operational in 1977 and named Mystic.
The Type 925 Dajiang with NATO reporting name Dajiang, or 大江 in Chinese, meaning Great River, is a type of naval auxiliary ship belonging to the People's Republic of China. Each ship is usually equipped with up to two Type 7103 DSRV class Deep Submergence Rescue Vehicles (DSRVs). The ship is designed to replace the first People's Liberation Army Navy (PLAN) submarine tender PLANS Mount Tai, and the lead ship of the Dajiang class is the Changxingdao. The Type 925 is a submarine tender that can also be used as a submarine rescue ship, and hence, it is designated as a submarine support ship by Chinese.
The Don-class submarine tender was the NATO reporting name for a group of seven submarine tenders built for the Soviet Navy in the late 1950s. The Soviet designation was Project 310 Batur. Evolving from a need for dispersed basing of submarines in the advent of a nuclear war, the ships were designed to support distant operations of the Soviet Union's submarine fleet, capable of repairing and resupplying. However, the Soviets returned to stationary basing of their submarines and the Don class were later converted into flagships. One vessel was exported to Indonesia in 1962 and due to the ship's heavy armament, was used primarily for patrol duties. The ships of the Don class were removed from service in the mid 1990s and broken up for scrap.
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.
Kommuna is a submarine salvage ship in service with the Russian Navy's Black Sea Fleet and the world's oldest active duty naval vessel. A double-hulled catamaran, she was laid down at the Putilov Factory in St. Petersburg in November 1912 as Volkhov. The ship was launched the following year, and commissioned on 14 July 1915. She was renamed Kommuna on 31 December 1922. Kommuna has served in the Russian Imperial, Soviet, and Russian Federation navies through the Russian Revolution and two World Wars.
Zadornyy was a Project 1135 Burevestnik-class guard ship or Krivak-class frigate that served with the Soviet and Russian Navies. Displacing 3,200 tonnes full load, the vessel was built around the Metel anti-submarine missile system. Zadornyy was launched on 25 March 1979 in Leningrad, the last of the class to be built by the A.A. Zhdanov shipyard, and served with the Northern Fleet. After taking part in exercises Avangard-81, Sever-81 and Okean-83, and cruising as far as Havana, Cuba, the vessel was upgraded between 11 June 1990 and 23 May 1995 with missiles that added anti-ship capability. While serving with the Russian Navy, the ship took part in joint exercises with frigates of the Royal Navy, including a commemoration of the first Arctic convoy of the Second World War with HMS Campbeltown. After more than twenty-five years service, the ship was decommissioned on 3 December 2005.
Retivyy was a Project 1135 Burevestnik-class Guard Ship or Krivak-class frigate. With an armament based around the URPK-4 Metel anti-submarine missile system, the vessel served with the Pacific Fleet of the Soviet and Russian Navies. The ship was launched on 14 August 1976 by A.A. Zhdanov in Leningrad, the second of the class built by the shipyard. After joining the fleet, the vessel took part in the search for the crew of the crashed Lockheed P-3 Orion AF 586. In 1981, the vessel sailed as part of a task force along the west coast of the United States to test and measure American defences. Decommissioned on 4 August 1995, the vessel was subsequently sold to a South Korean company to be broken up.
JS Chiyoda (ASR-404) is a submarine rescue ship of Japan Maritime Self-Defense Force.
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.
Dzerzhinskiy is a Project 11351 Nerey-class frigate of the Coast Guard of the Federal Security Service of Russia. As of 2022, Dzerzhinskiy is the only active vessel in the Coast Guard of Russia that was awarded with the Order of the Red Banner.
The Project 141, is a class of salvage vessel/submersible support built at Rostock's Neptun Werft in East Germany for the Soviet Navy.
Russian Navy 
