
A midget submarine is any
submarine
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or infor ...
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 ship
A mother ship, mothership or mother-ship is a large vehicle that leads, serves, or carries other smaller vehicles. A mother ship may be a maritime ship, aircraft, or spacecraft.
Examples include bomber aircraft, bombers converted to carry exp ...
s, from which they are launched and recovered and which provide living accommodation for the crew and support staff.
Both military and civilian midget submarines have been built. Military types work with surface ships and other submarines as mother ships. Civilian and non-combatant military types are generally called submersibles and normally work with surface ships. Most early submarines would now be considered midget submarines, such as the United States Navy's and the British Royal Navy's (both named for the same
designer
A designer is a person who plans the form or structure of something before it is made, by preparing drawings or plans. In practice, anyone who creates tangible or intangible objects, products, processes, laws, games, graphics, services, or exper ...
).
Military submarines
Uses

Midget submarines are best known for harbor penetration, although only two World War II boats, the British
X-craft
The X class was a World War II midget submarine class built for the Royal Navy during 1943–44. It was substantially larger than the original Chariot manned torpedo.
Known individually as X-Craft, the vessels were designed to be towed to the ...
and the unsuccessful
Welman submarine, were specifically designed with this in mind. Japan's
''Ko-hyoteki''-class submarines were originally designed to take part in decisive fleet actions. However, as circumstances changed, they were given the task of harbor penetration. Germany's various
World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict between two coalitions: the Allies of World War II, Allies and the Axis powers. World War II by country, Nearly all of the wo ...
designs were mostly designed to attack Allied shipping off landing beaches and harbors, although the ''
Seehund'' had a great enough range to attack shipping off the Thames estuary.
Midget submarines have also seen some use in support roles. X-craft were used for reconnaissance, and the ''Seehund'' was used to carry supplies. A number of modern midget submarines have also been built for submarine rescue.
Armament
Midget submarines are commonly armed with torpedoes and mines in the form of, for example, detachable side loads and nose sections. Alternatively they may function as
swimmer delivery vehicles to deliver
frogmen to the vicinity of their targets, which are then attacked with
limpet mines.
Civilian
In civilian use, midget submarines are generally called
submersible
A submersible is an underwater vehicle which needs to be transported and supported by a larger ship, watercraft or dock, platform. This distinguishes submersibles from submarines, which are self-supporting and capable of prolonged independent ope ...
s; commercial submersibles are used in, for example, underwater maintenance, exploration, archaeology, and scientific research. Other commercially available submersibles are marketed as novelty tourist attractions and as specialised tenders for wealthy yacht owners. Also, a growing number of amateur submariners homebuilt submersibles as a hobby.
Types by nation
Belgium
*
FNRS-2
The ''FNRS-2'' was the first bathyscaphe. It was created by Auguste Piccard. Work started in 1937 but was interrupted by World War II. The deep-diving submarine was finished in 1948. The bathyscaphe was named after the Belgian Fonds Nationa ...
pioneering research submersible
Colombia
* S.X.506 a 70-ton 5-man crew midget submarine designed by Italian shipbuilder Cosmos as a development of earlier S.X.404 by the same firm. Displacement is 58/70 t (surfaced/submerged), length is 23 m, beam is 2 m, draft is 4 m, and speed is 8.5/7 kn (surfaced/submerged). At a speed of 7 kn, range is 1200/60 nmi (surfaced/submerged). Payload includes externally attached torpedoes and swimmer delivery vehicles, and up to 8 divers can be carried in addition to the 5-man crew.
Finland
*
MIR
''Mir'' (, ; ) was a space station operated in low Earth orbit from 1986 to 2001, first by the Soviet Union and later by the Russia, Russian Federation. ''Mir'' was the first modular space station and was assembled in orbit from 1986 to ...
for research and submarine rescue
France
* FNRS-4 second generation research submersible
*
Nautile research submersible to depth of 6 kilometers
*
SP-350 ''Denise'' diving saucer
France also acquired a number of German midget submarines at the end of WW2.
Germany

Most German midget submarines were developed late in World War II in an attempt to stop the Allied invasion of Europe and used later to disrupt its supply lines. As a result, the submarines mostly engaged in open water attacks rather than harbour penetration.
*
Biber (324 built by AG Weser of Bremen)
[Lenton, H.T. ''GERMAN WARSHIPS of the Second World War'' Arco Publishing (1976) pp. 285–286]
*
Delphin (2 built) 2-man 5-ton torpedo with top speed of and submerged radius of at .
*
Hai (midget submarine)
''Hai'' (shark) was an advanced model of the Marder-class midget submarines created in Nazi Germany during World War II
World War II or the Second World War (1 September 1939 – 2 September 1945) was a World war, global conflict be ...
prototype of improved Marder.
*
Hecht Hecht may refer to:
* Hecht (surname)
* Hecht, a pop rock band from Lucerne, Switzerland.
* Hecht's, a chain of department stores, also known as Hecht Brothers, Hecht Bros. and the Hecht Company
* Hecht Museum at Haifa University in Israel
* '' ...
type XXVIIA 2-man 12 ton submarine with 1 mine or 1 torpedo carried outboard to a range of 38 miles at 4 knots.
[Taylor, J.C. ''German Warships of World War II'' Doubleday & Company (1967) p. 109]
*
Marder (~300 built) similar to Neger with breathing apparatus to allow submerged operation.
*
Molch
''Molch'' (German language: "newt" or "salamander") was an unsuccessful series of one-man midget submarines created during World War II. Built in 1944, it was the first mini-submarine of Nazi Germany's ''Kriegsmarine'', but was not successful in ...
Completely electric motor driven WWII (1944–1945) Midget submarine. Total 393 built.
*
Schwertwal (Grampus) Designed as super-fast Walter-type midget boat, but the prototype was not complete when scuttled in May 1945.
*
Neger (~200 built) 1-man 5-ton torpedo with underslung G7E torpedo. Top speed 20 knots and range of 30 miles at 3 knots.
*
Seehund type XXVIIB
[Taylor, J.C. ''German Warships of World War II'' Doubleday & Company (1967) p.110] Most successful midget submarine in the Kriegsmarine. Operational deployment was between January 1945 – April 1945.
*
V.80 4-man 76-ton prototype completed in 1940 to test Walther geared turbine propulsion system. Range was at .
[Lenton, H.T. ''GERMAN WARSHIPS of the Second World War'' Arco Publishing (1976) p.212]
* Orca class post-war midget submarine: 13.27 meter x 2.1 meter 5 men midget submarine with maximum depth of 100, maximum underwater speed of 5 kn, maximum range of 150 nmi, maximum endurance of 4 days, and maximum payload of 250 kg. Periscopes includes television camera, HF/HF communication and GPS antenna. There is also an underwater television camera and obstacle avoidance sonar with an effective range of 200 m. The low acoustic and magnetic signature midget sub displaces 28 t, powered by two computerized permanent magnetic electric motors that drive a single shaft low-cavitation and low noise propeller, which is controlled by fly-by-wire control system that is usually adopted for aircraft. The pressure hull is a modular design consisted of four modules that enables easy transportation and maintenance.
India
The
Indian Navy
The Indian Navy (IN) (ISO 15919, ISO: ) is the Navy, maritime and Amphibious warfare, amphibious branch of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Navy. The Chief of the Naval Staff (India), Chief ...
is planning to acquire two midget submarines at an estimated cost of ₹2000
Crore
Crore (; abbreviated cr) denotes the quantity ten million (107) and is equal to 100 lakh in the Indian numbering system. In many international contexts, the decimal quantity is formatted as 10,000,000, but when used in the context of the India ...
s for use as
swimmer delivery vehicles.
These submarines will be used for conducting underwater special operations by
MARCOS
Marcos may refer to:
People with the given name ''Marcos''
*Marcos (given name)
* Marcos family
Sports
;Surnamed
* Dayton Marcos, Negro league baseball team from Dayton, Ohio (early twentieth-century)
* Dimitris Markos, Greek footballer
* Né ...
. Both submarines will be constructed by
Hindustan Shipyard Limited.
Indonesia
The
Indonesian Navy
The Indonesian Navy (, TNI-AL) is the Navy, naval branch of the Indonesian National Armed Forces. It was founded on 10 September 1945 and has a role to patrol Indonesia's lengthy coastline, to enforce and patrol the territorial waters and Exclus ...
has shown some interest in having a new Midget-class submarine, built by local shipyards, for coastal rather than open water patrol. The submarine was designed a number of years ago by a retired Indonesian Navy submariner officer, Colonel (Ret) Ir. R. Dradjat Budiyanto, Msc. The midget experiment project involves the construction of a submarine, designated MIDGET IM X −1, which will weigh about 150 – 250 tonnes, with a tubular frame design 24 – 30 meters long, and four torpedo tubes. The submarines will have minimum of 8 – 10 crew members including officers. They will have a 40 km range non-hull-penetrating optronic mast as the attack periscope, and a 20 km range navigation periscope.
Indonesian defence minister
Purnomo Yusgiantoro has backed the project. Construction should commence at the Indonesian PT.PAL INDONESIA shipyard by late 2011, and will take about three or four years to complete.
Iran
*
Ghadir
*
Nahang
* Khomaini
Italy
* ''Siluro a Lenta Corsa'' (SLC), also known as ''Maiale'' (pig), a low speed
human torpedo
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.
...
. On 3 December 1941, ''Sciré'' departed La Spezia carrying three Maiale to conduct what became the
Raid on Alexandria (1941). At the island of
Leros in the
Aegean Sea
The Aegean Sea is an elongated embayment of the Mediterranean Sea between Europe and Asia. It is located between the Balkans and Anatolia, and covers an area of some . In the north, the Aegean is connected to the Marmara Sea, which in turn con ...
, six
Decima Flottiglia MAS crewmen came aboard, including
Lieutenant
A lieutenant ( , ; abbreviated Lt., Lt, LT, Lieut and similar) is a Junior officer, junior commissioned officer rank in the armed forces of many nations, as well as fire services, emergency medical services, Security agency, security services ...
Luigi Durand de la Penne. On December 18 ''Sciré'' released the manned torpedoes 1.3 miles from Alexandria commercial harbor, and they entered the harbor when the British opened the boom defence to let three of their
destroyer
In naval terminology, a destroyer is a fast, maneuverable, long-endurance warship intended to escort
larger vessels in a fleet, convoy, or carrier battle group and defend them against a wide range of general threats. They were conceived i ...
s pass. After many difficulties, de la Penne and his crewmate Emilio Bianchi successfully attached a limpet mine under , but had to surface as they attempted to leave and were captured. They refused to answer when questioned and were detained in a compartment aboard ''Valiant''. Fifteen minutes before the explosion, de la Penne asked to speak to the ''Valiants captain and informed him of the imminent explosion but refused to give other information. He was returned to the compartment and neither he or Bianchi were injured by the detonation of the mine. The other four torpedo-riders were also captured, but their mines sank ''Valiant'', the battleship , the Norwegian tanker ''Sagona'' and badly damaged the destroyer . The two battleships sank in only a few feet of water and were subsequently re-floated. Nevertheless, they were out of action for over a year.
*
Bathyscaphe Trieste was first to explore the
Challenger Deep
The Challenger Deep is the List of submarine topographical features#List of oceanic trenches, deepest known point of the seabed of Earth, located in the western Pacific Ocean at the southern end of the Mariana Trench, in the ocean territory o ...
of the
Mariana Trench
The Mariana Trench is an oceanic trench located in the western Pacific Ocean, about east of the Mariana Islands; it is the deep sea, deepest oceanic trench on Earth. It is crescent-shaped and measures about in length and in width. The maxi ...
*
CA type First series was a 2-man midget submarine the second series carried a crew of three.
*
CB type 45 ton 4 man design first introduced in 1941
*
CE2F/X100 post-war torpedo chariot
* MG 120: MG 120 Shallow water attack submarine (SWATS) is a development of MG 110 in Pakistani service with the displacement is increased to 130 t submerged, range is 1600 nmi @ 7 kn surfaced, 60 nmi @ 4.5 kn submerged, and the number of divers carried is drastically increased to 15.
* MG 130: MG 130 is a development of MG 120 with
AIP module called UAPE (Underwater Auxiliary Propulsion Engine) based on a closed circuit diesel fueled by liquid oxygen, which provides an underwater range of 400 nmi (740 km).
Japan

*
Type A ''Kō-hyōteki''-class midget submarines were used in the 1941
attack on Pearl Harbor
The attack on Pearl HarborAlso known as the Battle of Pearl Harbor was a surprise military strike by the Empire of Japan on the United States Pacific Fleet at Naval Station Pearl Harbor, its naval base at Pearl Harbor on Oahu, Territory of ...
, the 1942
attack on Sydney Harbour
From 31 May to 8 June 1942, during World War II, Imperial Japanese Navy submarines made a series of attacks on the Australian cities of Sydney and Newcastle, New South Wales, Newcastle. On the night of 31 May – 1 June, three Ko-hyoteki class ...
, and the 1942
Allied attack on Diego Suarez Harbor, in which the
type 97 torpedo was used operationally. The wreckage of one of the submarines sunk at Pearl Harbor was located by NOAA's Hawaii Undersea Research Laboratory (HURL) in August 2002. Photographic analysis conducted by the
United States Naval Institute
The United States Naval Institute (USNI) is a private non-profit military association that offers independent, nonpartisan forums for debate of national security issues. In addition to publishing magazines and books, the Naval Institute holds s ...
in 1999 indicated that one of the five ''Ko-hyoteki''-class submarines managed to enter Pearl Harbor, and successfully fired a torpedo into . On 29 May 1942, one of two midget submarines managed to enter the Diego Suarez harbor and fire two torpedoes. One torpedo seriously damaged the
battleship
A battleship is a large, heavily naval armour, armored warship with a main battery consisting of large naval gun, guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most form ...
, while the second sank the oil tanker ''British Loyalty'' (6,993 tons).

* Type B ''Kō-hyōteki''-class Midget Ha 45 prototype built 1942 to test Type A improvements.
[Watts, Anthony J. ''Japanese Warships of World War II'' Doubleday & Company (1967) p.213]
* Type C ''Kō-hyōteki''-class Midget Ha 62–76 similar to Type A with crew of 3 and range increased to at surfaced or at submerged.
* Type D ''Kō-hyōteki''-class, also called ''Kōryū'' class (115 completed) improved Type C with crew of 5 and range increased to at surfaced and at submerged.
[Watts, Anthony J. ''Japanese Warships of World War II'' Doubleday & Company (1967) p.216]
*
*
''Kaiten'' submarine suicide torpedo.
*
DSV ''Shinkai'' research submersible, capable of diving to a depth of
North Korea
*
Yugo-class submarine
*
Yono-class submarine (see also
ROKS ''Cheonan'' sinking)
South Korea
* S.X.756: Developed by Italian shipbuilder Cosmos as a successor of earlier S.X.506 midget submarine in Colombian service. Length is increased to 25.2 m and beam is increased to 2.1 m in comparison to its predecessor S.X.506, and displacement is increased to 73/80 t (surfaced/submerged). Crew is increased by one to a total of 6, but the total number of divers carried remained the same at 8. Range is 1600 nmi @ 6 kn surfaced, and 60 nmi @ 4 kn submerged, and payload remains the same.
*
Dolgorae class midget sub
Pakistan
*
MG 110: Developed by Italian shipbuilder Cosmos as a successor of earlier S.X.756 midget submarine in South Korean service. MG 110 is a slightly enlarged version of S.X.756 with length increased to 27.28 m, diameter increased to 2.3 m, and displacement increased to 102/110 t (surfaced/submerged). Range is 1200 nmi surfaced, and the submerged range remain the same. Payload and crew are also identical to that of its predecessor S.X.756 midget submarine.
China
*
Type 7103 DSRVs
*
Osprey class submersibles
*
Sea Pole class bathyscaphe
*
Dragon class bathyscaphe
*
Harmony class bathyscaphe
*Mobile diving bell
*QSZ-II submersible
Poland
*
Blotniak
*
Living torpedoes
Taiwan
*2 Italian
Cos.Mo.S CE2F/X100 post-war torpedo chariots
*2 Italian Cos.Mo.S S.X.404 midget submarines: S-1 Haijiao (海蛟), S-2 Hailong (海龍), in service from October 8, 1969, to November 1, 1973. S.X.404 is a 70-ton 4-man crew submarine design by Cosmos. Four were sold to Colombia and two to Taiwan in the 1970s.
Displaced is 40/70 t (surfaced/submerged), speed is 11/6.5
kn (surfaced/submerged), range is 1200/60
nmi (surfaced/submerged) @ respective maximum speed. Payload included externally attached torpedoes or mines, or swimmer delivery vehicles.
Romania
*
CB class, during World War II, Romania owned five midget submarines.
Russia
*In the late 19th century Russia built a class of treadle powered submarines 4.5 meters in length designed by
Stefan Drzewiecki they were withdrawn from service in 1886.
*APL and Pygmy projects – two boats were constructed in 1935-1936, tested, but later abandoned
*
Losos class submarine
Spain

* Foca class submarine (design begun in 1957, entering service in 1962): A total of 2 units built, SA 41 & SA 42. Displacement is 16/20 t (surfaced/submerged), with a crew of 3, and armed with two 21 in torpedo tubes. Stricken in 1971.
Not to be confused with World War II era Italian
Foca-class submarine.
*
Tiburón class submarine (design begun in 1958, entering service in 1964): A total of 2 units built, SA 51 & SA 52. Displacement is 78/81 t (surfaced/submerged), with a crew of 5, and armed with two 21 in torpedo tubes. Stricken in 1971.
Sweden
* Spiggen II class: midget submarine: 6 man crew midget sub displaces 14 t when submerged, with 5 kn speed and endurance of 2 weeks. Length: 11 m, beam: 1.4 m, height: 1.7 m.
[
* Sea Dagger: midget submarine developed by Kockums: a midget submarine of modular design with length of 16 – 20 m depending on various configurations totaling 4, including training, reconnaissance, diver delivery and small attack versions. All versions are consisted of 3 modules, two of which are identical for all versions, the bow and stern modules. The midsection has 4 modules to choose from, each for a specific mission. All versions lack the sail.
* UVS-1300 Malen: Originally built for navy purposes as sonar target. Midget submarine: 4 man crew midget sub displaces 11 t when submerged, with 5 kn speed and endurance of at least 1 week depending on fuel carried. Length: 10 m, beam: 1.4 m, height: 1.7 m.
]
Turkey
The Turkish navy has evaluated two midget submarine designs from German firm ThyssenKrupp Marine Systems, Type 200 and Type 300 classes:
* Type 200: Displacement: 200 t surfaced, length: 25 m, beam: 4.2 m, draft 3.1 m, speed: 8 kn surfaced, range: 2100 nmi @ 8 kn surfaced, endurance: 2 weeks, armament: 2 21-in torpedo tubes with a maximum of 4 torpedoes, crew: 6 + 12 divers.
* Type 300: Displacement: 300 t surfaced, length: 30 m, beam: 4.2 m, draft 3.1 m, speed: 12 kn surfaced, range: 3100 nmi @ 8 kn surfaced, endurance: 2 weeks, armament: 2 21- in torpedo tubes with a maximum of 6 torpedoes, crew: 12.
United Kingdom
The Royal Navy
The Royal Navy (RN) is the naval warfare force of the United Kingdom. It is a component of His Majesty's Naval Service, and its officers hold their commissions from the King of the United Kingdom, King. Although warships were used by Kingdom ...
has used a number of midget submarines. Most were developed during the Second World War. The decommissioning of the Stickleback class 1958–early 1960s marked the end of midget submarines designed for combat in the Royal Navy.
* Sleeping Beauty
"Sleeping Beauty" (, or ''The Beauty Sleeping in the Wood''; , or ''Little Briar Rose''), also titled in English as ''The Sleeping Beauty in the Woods'', is a fairy tale about a princess curse, cursed by an evil fairy to suspended animation in fi ...
Motorized Submersible Canoe (MSC): developed by Special Operations Executive
Special Operations Executive (SOE) was a British organisation formed in 1940 to conduct espionage, sabotage and reconnaissance in German-occupied Europe and to aid local Resistance during World War II, resistance movements during World War II. ...
Station IX during the Second World War.
* Chariot manned torpedo: the British developed two types of manned torpedoes; the Chariot Mark I, of 1.6 ton, and the Chariot Mark II, of 2.3 ton. Sixty-four units were built.
* Stickleback class: a post Second World War development of the XE class.
* X class: used to attack German warships in the north of Norway
Norway, officially the Kingdom of Norway, is a Nordic countries, Nordic country located on the Scandinavian Peninsula in Northern Europe. The remote Arctic island of Jan Mayen and the archipelago of Svalbard also form part of the Kingdom of ...
. One notable target of a successful attack was the battleship
A battleship is a large, heavily naval armour, armored warship with a main battery consisting of large naval gun, guns, designed to serve as a capital ship. From their advent in the late 1880s, battleships were among the largest and most form ...
''Tirpitz Tirpitz may refer to:
People
* Alfred von Tirpitz (1849–1930), German admiral
** Tirpitz Plan, a plan for Germany to achieve world power status through naval power
Ships
* German battleship ''Tirpitz'', a World War II-era Bismarck-class ...
''. The submarines had a crew of three (plus a diver) and carried two large mines containing Amatol
Amatol is a highly explosive material made from a mixture of TNT and ammonium nitrate. The British name originates from the words ammonium and toluene (the precursor of TNT). Similar mixtures (one part dinitronaphthalene and seven parts a ...
– one on each side. Their strategy was to lay mines on the sea bottom beneath the target, set a time fuse, and leave.
* XE class: used in the Far East
The Far East is the geographical region that encompasses the easternmost portion of the Asian continent, including North Asia, North, East Asia, East and Southeast Asia. South Asia is sometimes also included in the definition of the term. In mod ...
against Japan
Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
, where they carried out a number of attacks and special missions.
* Welman submarine: a single-person submersible widely considered a failure.
* Welfreighter: a Station IX-developed special operations submersible with two crew and up to four passengers, designed to resemble a motorboat when surfaced. Over 100 were produced, beginning in September 1944; the extent of operational use is unclear.
United States
* Advanced SEAL Delivery System: canceled in 2009 due to cost overruns and reliability issues, and the only sub was destroyed in a fire in 2008.
* '' Aluminaut'': the first aluminium submarine, used to recover sunken items, including DSV ''Alvin'' and an unarmed nuclear bomb.
* Bathyscaphe Trieste II (DSV-1): a sister ship to the Swiss-built Bathyscaphe Trieste
* DSV ''Alvin'' (DSV-2): performed thousands of dives, including one that explored the wreck of the .
* Code name: GIMIK(“''Gizmo #1” and “Gizmo #2''”) Office of Strategic Services
The Office of Strategic Services (OSS) was the first intelligence agency of the United States, formed during World War II. The OSS was formed as an agency of the Joint Chiefs of Staff (JCS) to coordinate espionage activities behind enemy lines ...
Project HEU covert infiltration semi-submersibles
Semi-submersible may refer to a self-propelled vessel, such as:
*Heavy-lift ship, which partially submerge to allow their cargo (another ship) to float into place for transport
*Narco-submarine, some of which remained partially on the surface
*S ...
for Operation NAPKO during WWII.
* Code name: SKIFF: (#1 and #2): Central Intelligence Agency
The Central Intelligence Agency (CIA; ) is a civilian foreign intelligence service of the federal government of the United States tasked with advancing national security through collecting and analyzing intelligence from around the world and ...
craft nearly identical in design to GIMIK.
* ''Nemo'' (DSV-5): an acronym for Naval Experimental Manned Observatory, a test vehicle operated by the Navy from 1970 to 1986. ''Nemo'' was a spherical submersible with a transparent acrylic hull, and its primary purpose was to evaluate the utility of the panoramic vision enabled by its design. ''Nemo'' was found to be an effective observation platform, despite not being able to hover in place, and acrylic-hulled submersibles have continued to be built and operated in the US.
* DSRV-1 ''Mystic'': a Deep Submergence Rescue Vehicle formerly operated by the US Navy. ''Mystic'' was replaced by the Submarine Rescue Diving Recompression System (SRDRS) in 2008 and donated to the Naval Undersea Museum.
* Dry Combat Submersible (DCS): a US Navy submarine under development by Lockheed Martin
The Lockheed Martin Corporation is an American Arms industry, defense and aerospace manufacturer with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta on March 15, 1995. It is headquartered in North ...
for transporting Navy SEALs
The United States Navy Sea, Air, and Land (SEAL) Teams, commonly known as Navy SEALs, are the United States Navy's primary special operations force and a component of the United States Naval Special Warfare Command. Among the SEALs' main funct ...
to and from a mission site. It is the planned replacement for the cancelled Advanced SEAL Delivery System.
* USS ''X-1'': an experimental US Navy midget submarine of the 1950s, used to explore how to defend harbors against attacks by very small submarines."Navy Tests First Midget Submarine As Close In Weapon"
''Popular Mechanics'', February 1956, p. 124, bottom of page.
Former Yugoslavia
*
''Una''-class: After the
Yugoslav Wars
The Yugoslav Wars were a series of separate but related#Naimark, Naimark (2003), p. xvii. ethnic conflicts, wars of independence, and Insurgency, insurgencies that took place from 1991 to 2001 in what had been the Socialist Federal Republic of ...
, both Croatia and
FR Yugoslavia
The State Union of Serbia and Montenegro or simply Serbia and Montenegro, known until 2003 as the Federal Republic of Yugoslavia and commonly referred to as FR Yugoslavia (FRY) or simply Yugoslavia, was a country in Southeast Europe locate ...
held examples. Length: 18 m, beam: 3.7 m, diameter: 2.5 m, displacement: 76 t surfaced, 90 t submerged, crew: 4 + 6 divers. Surfaced and submerged speed is 4 kn for both, and the range is 200 nmi surfaced, 50 nmi submerged both @ 4 kn. M-100 lacks
sail
A sail is a tensile structure, which is made from fabric or other membrane materials, that uses wind power to propel sailing craft, including sailing ships, sailboats, windsurfers, ice boats, and even sail-powered land vehicles. Sails may b ...
and its battery can only be charged when surfaced. Up to 4
R-1 swimmer delivery vehicle (SDV)s or two light (400 mm) torpedoes can be carried.
* Type M-100D: Development of Type M-100 Una class. Displacement is increased to around 88/100 t (surfaced/submerged), and the length is increased to approximately 21 m, beam is increased to 4.42 m, and diameter to 2.7 m. Speed is increased to 8/11 kn (surfaced/submerged), and range is increased to 550 nmi surfaced @ 10 kn when surfaced, and that of submerged remains the same as its predecessor M-100 Una class while the payload and crew also remain unchanged. A sail is added, and its battery can be charged while submerged.
See also
*
Coastal submarine
A coastal submarine or littoral submarine is a small, maneuverable submarine with a shallow draft (hull), draft well suited to navigating coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than mi ...
*
Narco-submarine
A narco-submarine (also called a drug sub or narco-sub) is a type of custom Seakeeping, ocean-going, Marine propulsion, self-propelled, semi-submersible or fully-submersible vessel built by (or for) drug smugglers.
Newer semi-submersibles are ...
*
Royal Navy Submarine Museum
The Royal Navy Submarine Museum at Gosport is a maritime museum tracing the international history of submarine development from the age of Alexander the Great to the present day, and particularly the history of the Royal Navy Submarine Service fr ...
*
Wet sub
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 oper ...
References
External links
*
{{Warship types of the 19th & 20th centuries