A diver propulsion vehicle (DPV), also known as an underwater propulsion vehicle, sea scooter, underwater scooter, or swimmer delivery vehicle (SDV) by armed forces, is an item of diving equipment used by scuba divers to increase range underwater. Range is restricted by the amount of breathing gas that can be carried, the rate at which that breathing gas is consumed, and the battery power of the DPV. Time limits imposed on the diver by decompression requirements may also limit safe range in practice. DPVs have recreational, scientific and military applications.
A midget submarine is any submarine under 150 tons, typically operated by a crew of one or two but sometimes up to six or nine, with little or no on-board living accommodation. They normally work with mother ships, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
The SEAL Delivery Vehicle (SDV) is a crewed submersible and a type of swimmer delivery vehicle used to deliver United States Navy SEALs and their equipment for special operations missions. It is operated by SEAL Delivery Vehicle Teams.
Human torpedoes or manned torpedoes are a type of diver propulsion vehicle on which the diver rides, generally in a seated position behind a fairing. They were used as secret naval weapons in World War II. The basic concept is still in use.
A motor torpedo boat is a fast torpedo boat, especially of the mid 20th century. The motor in the designation originally referred to their use of petrol engines, typically marinised aircraft engines or their derivatives, which distinguished them from other naval craft of the era, including other torpedo boats, that used steam turbines or reciprocating steam engines. Later, diesel-powered torpedo boats appeared, in turn or retroactively referred to as "motor torpedo boats" for their internal combustion engines, as distinct from steam powered reciprocating or turbine propulsion.
COMSUBIN is the Italian Navy's special operations unit. Italy was the first nation to use frogmen and human torpedoes. The Royal Italian Navy's Naval Assault Divisions are considered to be the precursor of modern Naval Special Forces. Their record can be traced back to World War I and the operation against the Austrian-Hungarian Battleship Viribus Unitis in Pula Harbour in 1918.
A wet sub is a type of underwater vehicle, either a submarine or a submersible, that does not provide a dry environment for its occupants. It is also described as an underwater vehicle where occupants are exposed to ambient environment during operations. The watercraft is classified as medium-sized or small vessel. This type of submarine differs from other underwater personal transport devices by the fact that it has a hull around it and it is not a "bare bones" design.
The Ambrosini SAI.207 was a light fighter interceptor and developed in Italy during World War II. Developed from the pre-war SAI.7 racing aircraft it was built entirely from wood, Powered by a single 750 hp Isotta Fraschini Delta, the SAI.207 enjoyed limited success during evaluation of the 12 pre-production aircraft.
The Cosmos-class submarine, officially Cos.Mo.S MG-110 locally designated as X-Craft, are a class of midget submarines designed by the Italian firm Cos.Mo.S, in Karachi Naval Dockyard, Pakistan.
The SX-404-class submarine, was a class of midget submarines produced by the Italian firm Cos.Mo.S.
CosMoS CE2F were a series of swimmer delivery vehicles (SDV) built by M/s Cos.Mo.S Spa. which was based in Livorno, Italy.
Type 904 general stores issue ship and its successors Type 904A and Type 904B are second generation general stores issue ships currently in service with the People's Liberation Army Navy (PLAN). A total of five units have been built and as of mid 2015, two Type 904 ships, one Type 904A, and two Type 904B.
The R-2 Mala is a class of swimmer delivery vehicles (SDVs) built for the Yugoslav, and later on, Croatian Navy. The two man wet SDVs are used for transporting naval commandos into hostile waters where they would perform sabotage on enemy warships and coastal installations. Weapons at their disposal included limpet mines.
The Wing Loong-10 is a series of unmanned aerial vehicles of the High-Altitude Long Endurance (HALE) type, featuring some stealth characteristics. As of 2017, it is being developed by the Chengdu Aircraft Industry Group for reconnaissance and precision strike missions.
The Shallow Water Combat Submersible (SWCS), also known as the Mark 11 SEAL Delivery Vehicle, is a crewed, wet (free-flooding) submersible that serves as a swimmer delivery vehicle for special-operations missions by United States Navy SEALs. Designed to replace the Mark 8 SEAL Delivery Vehicle on a 1-to-1 basis, Teledyne was awarded a contract to deliver 10 units for a cost of $179 million. The first two ships were delivered in 2018, with the last units planned for delivery in 2022. The SWCS will serve alongside the pressurized Dry Combat Submersible (DCS), a midget submarine developed by Lockheed Martin to replace the cancelled Advanced SEAL Delivery System (ASDS).
Cos.Mo.S, officially Costruzione Motoscafi Sottomarini s.a.s, was an Italian submarine and submersible manufacturer.
Drass, or DRASS, is an Italian manufacturing company headquartered in Livorno, whose best known for their range of midget submarine and swimmer delivery vehicle. The company also has a line of hyperbaric chambers for diver decompression. Work is done at Livorno and also Ghiroda, Romania.
The Luch Korsar is a medium-weight Russian unmanned aerial vehicle developed by OKB Luch, member of Ruselectronics owned by Rostec, to perform reconnaissance, strike and electronic attack missions on behalf of the Russian Ground Forces and Navy. The program started in 2009 and the flight testing commenced in 2015. It is considered as an improved analogue of the US-made RQ-7 Shadow UAV.
HSU-001 is a class of Chinese unmanned underwater vehicle.
The Shahed 149 Gaza or, is an Iranian unmanned combat aerial vehicle (UCAV) operated by the Iranian Revolutionary Guard. It was unveiled on 21 May 2021 and named after the Gaza Strip in honor of the Palestinians' struggle against Israel amid the 2021 Israel–Palestine crisis. It was delivered to the IRGC Aerospace Force in 2022.
