Human torpedo

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Human torpedoes or manned torpedoes are a type of rideable submarines that were used as secret naval weapons in World War II. The basic design is still in use today: they are a type of diver propulsion vehicle.

The name is most commonly used to refer to the weapons that Italy, and later Britain, deployed in the Mediterranean and used to attack ships in enemy harbours. A group of a dozen countries used the human torpedo, from Italy and Great Britain to Argentina and Egypt, and there are some Museums and movies dedicated to this naval weapon. Actually the human torpedo is used even for sport diving.

Contents 1 Characteristics 2 Construction 3 Timeline 4 Italy 4.1 World War II 4.2 After 1945 5 United Kingdom 6 Germany 7 Japan 8 Russia/USSR 9 United States 10 Other countries 10.1 Argentina 10.2 Egypt 10.3 Yugoslavia 11 Museums 12 Movies and fiction 13 Chariots for sport diving 14 Media 15 See also 16 Notes 17 References 18 External links

[edit] Characteristics

The first human torpedo (the Italian "Maiale") was electrically propelled, with two crewmen in diving suits riding astride. They steered the torpedo at slow speed to the enemy ship. The detachable warhead was then used as a limpet mine. They then rode the torpedo away.

In operation, the Maiale torpedo was carried by another vessel (usually a normal submarine), and launched near the target. Most manned torpedo operations were at night and during the new moon to cut down the risk of being seen.

The idea was successfully applied by the Italian navy (Regia Marina) early in World War II and then copied by the British when they discovered the Italian operations. The official Italian name for their craft was Siluro a Lenta Corsa (SLC or "Slow-running torpedo"), but the Italian operators nicknamed it maiale (Italian for "pig"; plural maiali) because it was difficult to steer. The British copies were named "chariots".

[edit] Construction

A typical manned torpedo has a propeller and hydroplanes at the rear, side hydroplanes in front, and a control panel and controls for its front rider. It usually has two riders who sit facing forwards. It has navigation aids such as a compass, and nowadays modern aids such as sonar and GPS positioning and modulated ultrasound communications gear. It may have an air (or other breathing gas) supply so its riders do not have to drain their own apparatus while they are riding it. In some the riders' seats are enclosed; in others the seats are open at the sides as in sitting astride a horse. The seat design includes room for the riders' swimfins (if used). There are flotation tanks (typically four: left fore, right fore, left aft, right aft), which can be flooded or blown empty to adjust buoyancy and attitude.

[edit] Timeline

• 1 November 1918: Two men of the Regia Marina, Raffaele Paolucci and Raffaele Rossetti, in diving suits, rode a primitive manned torpedo (nicknamed Mignatta or "leech") into the Austro-Hungarian Navy base at Pola (Istria), where they sank the Austrian battleship Viribus Unitis and the freighter Wien using limpet mines. They had no breathing sets and they had to keep their heads above water, and thus they were discovered and taken prisoner.^[1]

• 1938: In Italy the "1^a Flottiglia Mezzi d'Assalto" (First Fleet Assault Vehicles) was formed as a result of the research and development efforts of two men - Major Teseo Tesei and Major Elios Toschi of the Italian Royal Navy. The pair resurrected the idea of Paolucci and Rossetti.
• 1940: Commander Moccagatta of the Italian Royal Navy (Regia Marina) reorganised the 1st Fleet Assault Vehicles into the Decima Flottiglia MAS (Tenth Light Flotilla of assault vehicles) or "X-MAS", under the command of Ernesto Forza. It secretly manufactured manned torpedoes and trained war frogmen, called nuotatori (Italian: "swimmers").
• 1941: An attack on Valletta Harbour was a disaster for the X MAS and Major Teseo Tesei lost his life.
• 7 December 1942: The Decima Flottiglia MAS attacked the port of Alexandria with three maiali. The battleships HMS Valiant and Queen Elizabeth (and an 8,000-ton tanker) were sunk in shallow water putting them out of action for many months. The attack was performed even by diver Sergeant Salvatore Leone, from Taormina, Sicily. He was killed when the British "reacted furiously" to the attack, his body never being recovered. Sgt Leone was awarded the 'Silver Medal of Military Merit' and a memorial to commemorate his bravery, erected in the Community Gardens in Taormina on the 50th anniversary of the attack. The memorial includes a rebuilt "PIG" and a description of the events, in three langauges.
• October 1942: Two British chariots were carried aboard the Shetland Bus fishing-boat Arthur to attack the Tirpitz on Operation Title. They were swung overboard once in Norwegian waters but both became detached from their tow-hooks in a gale and the operation was a total failure.^[2]
• 1–2 January 1943: British submarines Thunderbolt, Trooper and P311 took part in Operation Principal. P311 was lost en route to La Maddelena but the other two boats had some success at Palermo, launching two and three Chariots respectively. The Ulpio Traiano was sunk and the stern torn off Viminale. However the cost was high with one submarine and one chariot lost and all but two charioteers captured.
• 18 January 1943: Thunderbolt took two chariots to Tripoli for Operation Welcome. This was to prevent blockships being sunk at the harbour mouth, so denying access to the Allies. Again, partial success was achieved. This was the last operation in which chariots were carried in containers on British submarines, although some others followed with the chariots on deck without containers.
• 2 October 1943: A bigger Italian frogman-carrier, 10 metres (33 ft) long and carrying four frogmen, called Siluro San Bartolomeo, or SSB, was going to attack Gibraltar, but Italy surrendered and the attack was called off.
• 21 June 1944: A British-Italian joint operation was mounted against shipping in La Spezia harbour. The chariots were carried on board an MTB and the cruiser Bolzano was sunk.
• 8 July 1944: A German Neger-type torpedo manned by Lt. Potthast heavily damaged the Polish light cruiser ORP Dragon off the Normandy beaches.
• 27–28 October 1944: The British submarine Trenchant carried two Mk 2 Chariots (nicknamed Tiny and Slasher) to an attack on Phuket harbor in Thailand. See British commando frogmen#1944 for more information about this attack. No manned torpedo operations in combat in any war are known with certainty of after this date.
• Immediate post-war period: The British Chariots were used to clear mines and wrecks in harbours.

For other events, see Operations of X Flottiglia MAS and British commando frogmen.

Some nations including Italy have continued to build and deploy manned torpedoes since 1945.

[edit] Italy

Raffaele Rossetti in 1918 created a new weapon, based on his bright idea of a torpedo manned by a person, to be linked to enemy vessels underwater and explode under the ship hull. This weapon was called "mignatta" (leech) and was the precursor of the maiale of World War II and the actual human torpedo.

[edit] World War II

• Siluro a Lenta Corsa (Italian, Low Speed Torpedo – SLC), also known as maiale (Italian for "pig", plural maiali). Image at this link. Pages 6–11, issue 39, Historical Diving Times has several large photographs of one recovered after an attack on Malta on 26 July 1941.
• Siluro San Bartolomeo (Italian, St. Bartholomew Torpedo, also called SSB). It was never used in action. Image at this link.

For information on Italian manned torpedo operations, see Decima Flottiglia MAS.

• Media related to Maiale manned torpedo at Wikimedia Commons

[edit] After 1945

• CE2F/X100 is a make of chariot made after 1945. There is an image of it on this link. They are made in Italy. Range 50 miles (80 km). 2 riders. The Pakistan Navy has several of them. India and Argentina also have some. [1] Recent upgrades include:
  • control module with a GPS
  • autopilot
  • Digitized on board electronics
  • launcher for five LCAW minitorpedoes (optional)

[edit] United Kingdom

World War II

• Chariot Mark 1. 6.8 m (22 feet 4 inches) long, 0.9 m (2 feet 11 inches) wide, 1.2 m (3 feet 11 inches) high, speed 2.5 knots (4.6 km/h) , weight: 1.6 tonnes , maximum diving depth: 27 m. Endurance 5 hours (distance would depend on water current). Its control handle was -shaped.
• Chariot Mark II, had two riders, who sat back to back.

For information on British manned torpedo operations, see British commando frogmen.

[edit] Germany

World War II

• Neger. Used in World War II. An extreme form of a genuine manned torpedo that carried the weapon, a second torpedo, underneath which was launched at the target. Speed: 4 knots (7.4 km/h). One seat. The torpedo was named after its inventor Richard Mohr. (Mohr and Neger are German words for "negro".)
• Marder and Biber. Very small submarines which carried two torpedoes and one or two men.

There were other types which never ran into production.

[edit] Japan

World War II

• Kaiten. It was a steered fast torpedo and in practice was a suicide weapon. As such their operations differed substantially from those of the Italian, British and German.

[edit] Russia/USSR

After 1945

• Siren. It is or was made after 1945. It is longer than a British or Italian Chariot because it has 2 warheads. It has 2 riders. It was designed to exit through a submarine's torpedo tube. See Russian commando frogmen#Equipment.

[edit] United States

After 1945

There are pictures and descriptions of modern US Chariot-like underwater frogman-carriers used by SEAL's and a fast surface boat that can submerge, here:

• http://www.specialoperations.com/Navy/SDV/ (SDV = Swimmer Delivery Vehicle)
• http://stiddmil.com/ (STD = Swimmer Transport Device)); downloadable catalog (11 megabytes, prints to 16 A4 pages)

[edit] Other countries

[edit] Argentina

In Argentina were developed special minisubmarines in the 1950s, with a torpedo attached under the two-men crew.

[edit] Egypt

This photograph was taken at a military parade in Cairo in 1963. It shows two chariots, each two-seat, and their riders' legs are enclosed.

[edit] Yugoslavia

The Yugoslav Navy did not have manned torpedoes, but frogmen used the underwater device called R-1 Diver for a variety of missions, including: mine clearance, infiltration, clandestine surveillance and security, and assault missions on enemy shipping and naval objects. These small apparatuses were relegated to the navies of Croatia (HRM) (1991) and Montenegro (2007).

[edit] Museums

• Original SLC's (Siluri Lenta Corsa or "Maiale") are displayed at the Venice Naval History Museum.
• There are three chariots on public view in Eden Camp Museum near Malton, North Yorkshire in England:
  • A restored original British Mark II, which was found derelict in a scrapyard in Portsmouth. In this design, the two riders sat back to back.
  • A working chariot that was made in 1992 in Milton Keynes with approximately the outside appearance of a British wartime Mark I, but with differing internal working parts. It has been filmed in action for the television. It has a dummy warhead. Image at this link. It was last used in 2006.
  • A replica Italian maiale made soon after 1945 by the same Italian firm (Caproni) who made the wartime maiali. As at July 2008 this was on loan to the National Maritime Museum Cornwall in Falmouth, Cornwall until the end of 2008, but as at 16 March 2009 it was back in Eden Camp.

• There is an Italian SSB maiale in the Naval Museum at Groton, Connecticut in the USA.

[edit] Movies and fiction

• The movie The Valiant, done in 1962, is about the sinking of the HMS Valiant in Alexandria harbour. There it is even a 1953 Italian movie (I sette dell'Orsa Maggiore) about the attack, done with some real members of Decima Flottiglia MAS as support actors in the cast.
• The film Above Us the Waves (released in 1955) concentrates on the midget submarine attack on Tirpitz battleship. The film has a scene of a fight between British and German frogmen at an anti-submarine net; this never happened in the real attack on the Tirpitz.
• The film The Silent Enemy (released in 1958) does not represent real events accurately. In particular, in the real world there was no attack on the Olterra, and no underwater hand-to-hand battle between Italian and British frogmen. The breathing sets used by the film actors representing the Italian frogmen seem to be British naval type rebreathers and not authentic Italian rebreathers. The three chariots seen in the movie, representing Italian maiali, were crudely-made film props.
• A film The Eagle Has Landed briefly features a German paratroop Officer, a Colonel played by Michael Caine and his men who have been sent to man chariots on the Channel Islands.
• Ian Fleming who wrote the James Bond stories was in Naval Intelligence stationed at Gibraltar in the war, and was likely aware of the Italian operations.
• The chariot seen in the James Bond film On Her Majesty's Secret Service is a realistic-looking but non-functioning film prop. When seen it is in a kit store. It does not take part in any action; the action happens up a mountain in the Swiss Alps.
• Underwater vehicles (not chariot-shaped) featured in the James Bond film Thunderball.
• Fictional chariot operations, set during and after World War II, have appeared in stories in many comics.
• In Metal Gear Solid, Solid Snake uses one.

[edit] Chariots for sport diving

At least two makes of chariot-like diver-riders for sport divers were on sale in the diving gear trade for a while after 1960.

One of those makes was tradenamed "Dolphin" and was made on the Isle of Wight. In the 1960s or 1970s, both ends were tapered to a point.

Another type was USA-made and looked like a wartime chariot but its hull was thinner.

[edit] Media

Controls of British MK 1 chariot, at Eden Camp museum in England	Stern end of British MK 1 chariot, at Eden Camp museum in England	Side view of front of British MK 1 chariot, at Eden Camp museum in England	Side view of rear of British MK 1 chariot, at Eden Camp museum in England
pilot's seat of British Mk 2 chariot, Eden Camp museum in England	British Mk 2 chariot, Eden Camp museum in England	Human torpedo pioneer Teseo Tesei, of the Regia Marina, was killed during an operation in 1941	Błotniak

[edit] See also

• Midget submarine
• X class submarine
• Frogman
• Wet sub

[edit] Notes

[edit] References

[edit] External links

Wikimedia Commons has media related to: Human torpedoes

• The British Chariots, diving gear and personal experiences
• Chariots in armed forces service after 1945
• Vostok: a French 2-man diver-rider that may be a chariot (article in French)
• Underwater Heritage Trust
• Eden Camp Museum
• More images of the restored British Mark II chariot
• Comando Supremo: Italy at War
• British submarines of World War 2
• Chariots, accounts of operations, pictures
• Roll of honour, awards and images for chariots and midget submarines.
• Underwater Warriors
• Japanese suicide weapon：Human　torpedo　Kaiten(Japanese)
• HNSA Ship Page: Italian Siluro San Bartolomeo