A remotely operated underwater vehicle (ROUV) or remotely operated vehicle (ROV) is a free-swimming submersible craft used to perform underwater observation, inspection and physical tasks such as valve operations, hydraulic functions and other general tasks within the subsea oil and gas industry, military, scientific and other applications. ROVs can also carry tooling packages for undertaking specific tasks such as pull-in and connection of flexible flowlines and umbilicals, and component replacement. They are often used to visit wrecks at great depths beyond the capacities of submersibles for research purposes, such as the Titanic, amongst others.
The Hunt class is a class of thirteen mine countermeasure vessels of the Royal Navy. As built, they combined the separate roles of the traditional minesweeper and that of the active minehunter in one hull, but later modifications saw the removal of mine-sweeping equipment. They have a secondary role as offshore patrol vessels.
An autonomous underwater vehicle (AUV) is a robot that travels underwater without requiring continuous input from an operator. AUVs constitute part of a larger group of undersea systems known as unmanned underwater vehicles, a classification that includes non-autonomous remotely operated underwater vehicles (ROVs) – controlled and powered from the surface by an operator/pilot via an umbilical or using remote control. In military applications an AUV is more often referred to as an unmanned undersea vehicle (UUV). Underwater gliders are a subclass of AUVs.
The AN/BLQ-11 autonomous unmanned undersea vehicle is a torpedo tube-launched and tube-recovered underwater search and survey unmanned undersea vehicle (UUV) capable of performing autonomous minefield reconnaissance as much as 200 kilometers (120 mi) in advance of a host Los Angeles-, Seawolf-, or Virginia-class submarine.
Unmanned underwater vehicles (UUV), also known as uncrewed underwater vehicles and underwater drones, are submersible vehicles that can operate underwater without a human occupant. These vehicles may be divided into two categories: remotely operated underwater vehicles (ROUVs) and autonomous underwater vehicles (AUVs). ROUVs are remotely controlled by a human operator. AUVs are automated and operate independently of direct human input.
A mine countermeasures vessel or MCMV is a type of naval ship designed for the location of and destruction of naval mines which combines the role of a minesweeper and minehunter in one hull. The term MCMV is also applied collectively to minehunters and minesweepers.
The Talisman UUV is a fully autonomous unmanned mini-sub designed and made by BAE Systems. It has the capability to perform shoreline reconnaissance when the risks may be deemed too high, or conditions unsuitable, for human operators.
The AN/AQS-20A is a sonar mine countermeasure detection system, developed by Raytheon. The system was initially tested for use on the MH-60S and MH-53E helicopters and as part of the mission package for the littoral combat ships (LCS) and some United States Navy destroyers of the Arleigh Burke class. However, the Chief of Naval Operations excluded the system from use on helicopter assets in March 2012, and only one destroyer has been outfitted with the specific mission package as of April 2009. The AN/AQS-20 naval mine hunting sonar systems will be employed for deeper mine threats. The "Q-20", as it is commonly called, is an underwater towed body containing a high resolution, side-looking, multi-beam sonar system used for minehunting along the ocean bottom. This rapidly deployable system provides real-time sonar images to operators to locate, classify, mark and record mine-like objects and underwater terrain features. The AQS-20 has an active, stabilized underwater vehicle, equipped with advanced multiple-beam side-looking sonar. The underwater body is towed via a small-diameter electromechanical cable, while an operator can view the underwater image and identify objects on a video monitor while recording the data on S-VHS digital tapes for post mission analysis. Operators actually "fly" the device underwater, controlling the depth of the device the same way that an airplane controls its altitude. Once located, the exact coordinates of mine-like objects can be used by explosive ordnance disposal (EOD) personnel to reacquire and neutralize the mine.
Katanpää-class mine countermeasure vessels are a class of three multipurpose mine countermeasure vessels (MCMV) ordered by the Finnish Navy. The nearly 250 million euro contract was awarded to the Italian shipyard Intermarine S.p.A. in 2006. Initially, all three vessels were scheduled to be delivered by 2014 and the class was expected to achieve operational readiness by 2015, but there have been various delays and the last vessel was handed over to the Finnish Navy in November 2016.
The Landsortclass mine countermeasures vessel were built by Swedish shipbuilding company, Kockums for the Swedish Navy and the Republic of Singapore Navy (RSN) between 1983 and 1996.
Sea Dragon-class remotely operated underwater vehicles (ROUVs) are a class of Chinese remotely operated vehicle (ROV) used to perform various underwater tasks such as oil platform service, salvage, and rescue missions. Following the successful development of the original Sea Dragon (海龙), a series of ROUVs based on it have been developed. The original model had a diving capability up to 3,500 meters, but subsequent models were designed to meet a variety of operating conditions.
Explorer autonomous underwater vehicle (AUV) is a Chinese AUV developed in the People's Republic of China (PRC), first entering service in November 1994. It should not be confused with another two Anglo-American AUVs that share the same name: the American Autonomous Benthic Explorer AUV (ABE) built by Woods Hole Oceanographic Institution, and the British Columbia-based International Submarine Engineering built Canadian Explorer AUV, which is based on its earlier ARCS AUV. Many Chinese AUVs later developed, such as Wukong, WZODA, CR series, Exploration series, Micro Dragon series, Sea Whale series, Submerged Dragon series AUVs, are all based on experienced gained from Explorer AUV.
AUV - 150 is an unmanned underwater vehicle (UUV) being developed by Central Mechanical Engineering Research Institute (CMERI) scientists in Durgapur in the Indian state of West Bengal. The project is sponsored by the Ministry of Earth Sciences and has technical assistance from IIT-Kharagpur.
The REMUS series are autonomous underwater vehicles (AUVs) made by the Woods Hole Oceanographic Institution and designed by their Oceanographic Systems Lab (OSL). More recently REMUS vehicles have been manufactured by the spinoff company Hydroid Inc, which was a wholly owned subsidiary of Kongsberg Maritime. Hydroid was acquired by Huntington Ingalls Industries (HHI) in March 2020. The series are designed to be low cost, they have shared control software and electronic subsystems and can be operated from a laptop computer. They are used by civilians for seafloor mapping, underwater surveying, and search and recovery as well as by several navies for mine countermeasures missions.
The Rainbowfish-class bathyscaphe is a Chinese deep submergence vehicle under development in 2015 and originally scheduled to enter service in 2019, but has since been postponed after 2020.
CAS benthic landers (BL)s are a series of very little known unmanned underwater vehicles (UUV)s developed by Chinese Academy of Sciences (CAS) in the People's Republic of China (PRC). As of the early 2020s, a total of five have been identified.
CSSC unmanned vehicles (UUV)s are uncrewed vehicles developed in the People's Republic of China (PRC) by China State Shipbuilding Corporation (CSSC), most of which are in service with various Chinese governmental agencies/departments, and government-owned enterprises.
Hadal 1 ARV is a type of unmanned underwater vehicle (UUV) built in the People's Republic of China (PRC). ARV stands for Autonomous Remotely-controlled Vehicle, an idea pioneered in China by Shenyang Institute of Automation (SIA) of Chinese Academy of Sciences (CAS), and SIA is also the developer of Hadal 1 ARV, and its predecessor Hadal ARV, as well as Arctic ARV, the predecessor of Hadal ARV. Hadal 1 and its predecessor Hadal, and earlier Arctic series ARVs are the Chinese counterparts of Nereus hybrid unmanned underwater vehicle (UUV), because just like Nereus hybrid UUV, these ARVs can operate both as a AUV or a ROUV. The general designer of Hadal 1 ARV is Mr. Tang Yuan-Gui (唐元贵).
Hadal ARV is a type of very little known unmanned underwater vehicle (UUV) built in the People's Republic of China (PRC). ARV stands for Autonomous Remotely-controlled Vehicle, an idea pioneered in China by Shenyang Institute of Automation (SIA) of Chinese Academy of Sciences (CAS), and SIA is also the developer of Hadal ARV and its predecessor Arctic ARV, as well as Hadal 1 ARV, the successor of Hadal ARV. Hadal and its predecessor Arctic series ARVs are the Chinese counterparts of Nereus hybrid unmanned underwater vehicle, because just like Nereus hybrid UUV, these ARVs can operate both as an AUV or a ROUV.
The BlueWhale is an unmanned underwater vehicle (UUV) produced by from Israeli manufacturer Elta Systems Ltd. is used to gather information using radar, SIGINT and communications technologies.
United States 
Romania 
