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ce ships most early submarines would now be considered midget submarines such as the united states navy s uss holland ss 1 and the british royal navy s hms holland 1 both named for the same designer military submarines edit uses edit crew of a british x class midget submarine part of the british pacific submarine fleet midget submarines are best known for harbor penetration although only two world war ii boats the british x craft 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 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 edit 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 edit in civilian use midget submarines are generally called submersibles 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 2 3 types by nation edit belgium edit fnrs 2 pioneering research submersible colombia edit 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 4 ussr and finland edit mir for research and submarine rescue france edit fnrs 3 research submersible archimède research submersible 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 edit german midget submarine seehund with a torpedo most german midget submarines were developed late in world war ii in an attempt to stop the allied liberation 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 5 6 biber 324 built by ag weser of bremen 5 7 delphin 2 built 2 man 5 ton torpedo with top speed of 20 knots 37 km h and submerged radius of 30 nautical miles 56 km at 3 knots 5 6 km h 5 7 hai midget submarine prototype of improved marder 5 7 hecht type xxviia 2 man 12 ton submarine with 1 mine or 1 torpedo carried outboard to a range of 38 miles at 4 knots 8 marder 300 built similar to neger with breathing apparatus to allow submerged operation 5 7 molch completely electric motor driven wwii 1944 1945 midget submarine total 393 built 5 schwertwal grampus designed as super fast walter type midget boat but the prototype was not complete when scuttled in may 1945 5 neger 200 built 1 man 5 ton torpedo with underslung g7e torpedo top speed 20 knots and range of 30 miles at 3 knots 5 7 seehund type xxviib 9 most successful midget submarine in the kriegsmarine operational deployment was between january 1945 april 1945 5 v 80 4 man 76 ton prototype completed in 1940 to test walther geared turbine propulsion system range was 50 nautical miles 93 km at 28 knots 52 km h 10 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 11 india edit the indian navy is planning to acquire two midget submarines at an estimated cost of 2000 crores for use as swimmer delivery vehicles 12 new archival link needed these submarines will be used for conducting underwater special operations by marcos 13 both submarines will be constructed by hindustan shipyard limited 12 indonesia edit the indonesian navy has shown when 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 citation needed 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 edit ghadir nahang khomaini italy edit an italian cb class submarine in the nikola tesla technical museum in zagreb croatia siluro a lenta corsa slc also known as maiale pig a low speed human torpedo 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 six decima flottiglia mas crewmen came aboard including lieutenant 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 destroyers pass after many difficulties de la penne and his crewmate emilio bianchi successfully attached a limpet mine under hms valiant 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 valiant s 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 queen elizabeth the norwegian tanker sagona and badly damaged the destroyer hms jervis 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 of the mariana trench ca type first series was a 2 man midget submarine the second series carried a crew of three 14 cb type 45 ton 4 man design first introduced in 1941 14 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 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 15 japan edit japanese type a midget submarine recovered in 1960 off pearl harbor hawaii type a kō hyōteki class midget submarines were used in the 1941 attack on pearl harbor the 1942 attack on sydney harbour and the 1942 allied attack on diego suarez harbor 16 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 17 photographic analysis conducted by the united states naval institute in 1999 indicated that one of the five ko hyoteki class submarines managed to enter pearl harbor and successfully fired a torpedo into uss west virginia 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 hms ramillies while the second sank the oil tanker british loyalty 6 993 tons dsv shinkai type b kō hyōteki class midget ha 45 prototype built 1942 to test type a improvements 18 type c kō hyōteki class midget ha 62 76 similar to type a with crew of 3 and range increased to 350 nautical miles 650 km at 6 knots 11 km h surfaced or 120 nautical miles 220 km at 4 knots 7 4 km h submerged 18 type d kō hyōteki class also called kōryū class 115 completed improved type c with crew of 5 and range increased to 1 000 miles 1 600 km at 8 knots 15 km h surfaced and 320 miles 510 km at 16 knots 30 km h submerged 19 kairyū class submarine kaiten submarine suicide torpedo dsv shinkai research submersible capable of diving to a depth of 6 5 kilometres 4 0 miles north korea edit yugo class submarine yono class submarine see also roks cheonan sinking south korea edit 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 4 dolgorae class midget sub pakistan edit 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 4 china edit type 7103 dsrvs osprey class submersibles sea pole class bathyscaphe dragon class bathyscaphe harmony class bathyscaphe mobile diving bell qsz ii submersible poland edit blotniak taiwan edit 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 20 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 4 romania edit cb class during world war ii romania owned five midget submarines 21 russia edit 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 22 apl and pygmy projects two boats were constructed in 1935 1936 tested but later abandoned 23 losos class submarine spain edit foca i sa 41 and foca ii sa 42 at cartagena 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 24 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 24 sweden edit 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 11 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 25 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 26 turkey edit 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 27 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 27 united kingdom edit x24 a british x class submarine on display at the royal navy submarine museum the royal navy 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 motorized submersible canoe msc developed by special operations executive 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 28 stickleback class a post second world war development of the xe class x class used to attack g...