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A torpedo boat is a relatively small and fast naval ship designed to carry torpedoes into battle. The first designs rammed enemy ships with explosive spar torpedoes, and later designs launched self-propelled Whitehead torpedo. They were created to counter battleships and other large, slow and heavily armed ships by speed and agility.

The torpedo as we know it was invented in 1860 by captain Giovanni Luppis (also known as Ivan Blaz Lupis) in the city of Rijekamarker, Croatiamarker, then part of the former Austria-Hungary. It was first shown to the public in 1860; in 1866 he demonstrated his work together with Robert Whitehead. The first torpedo factory was built in Rijeka.

American Civil War

The Confederate torpedo boat CSS David in Charleston Harbor
Drawings of the Confederate torpedo boat CSS David
The American Civil War saw a number of innovations in naval warfare, including the first torpedo boats, which carried spar torpedoes. In 1861 President Lincoln instituted a naval blockade of Southern ports, which crippled the South's efforts to obtain war materials from abroad. The South also lacked the means to construct a naval fleet capable of taking on the Union Navy. One strategy to counter the blockade saw the development of torpedo boats, small fast boats designed to attack the larger capital ships of the blockading fleet.

The David class of torpedo boats were steam powered with a partially enclosed hull. They were not true submarines but were semi-submersible; when ballasted, only the smokestack and few inches of the hull were above the water line. On a dark night, and burning smokeless anthracite coal, the torpedo boats were virtually invisible. The Davids were named after the story of David and Goliath. The CSS Midge and CSS St. Patrick were David-class torpedo boats.

The CSS Squib and CSS Scorpion represented another class of torpedo boats that were also low built but had open decks and lacked the ballasting tanks found on the Davids.
A beached David class torpedo boat after the war

19th century spar torpedo boat.
The Confederate torpedo boats were armed with spar torpedoes. This was a charge of powder in a waterproof case, mounted to the bow of the torpedo boat below the water line on a long spar. The torpedo boat attacked by ramming her intended target, which stuck the torpedo to the target ship by means of a barb on the front of the torpedo. The torpedo boat would back away to a safe distance and detonate the torpedo, usually by means of a long cord attached to a trigger.

In general, the Confederate torpedo boats were not very successful. Their low sides made them susceptible to swamping in high seas, and even to having their boiler fires extinguished by spray from their own torpedo explosions. Torpedo misfires (too early) and duds were common.

In 1864 Union Naval Lieutenant Cushing fitted a steam launch with a spar torpedo to attack the Confederate ironclad CSS Albermarle. Also the same year the Union launched the USS Spuyten Duyvil, a purpose-built craft with a number of technical innovations including variable ballast for attack operations and an extensible and reloadable torpedo placement spar.

The era of self-propelled torpedoes

The first European prototypes of a self-propelled torpedo were created by Giovanni Luppis, an Austrian naval officer from Fiume (today Rijeka, Croatia), a port city of the Austrian Empire. In 1860, he presented the salvacoste (coastsaver), a floating weapon, driven by ropes from the land. The project was not taken up by the Navy. Luppis knew Robert Whitehead, an English engineer who was the manager of a Fiume factory and in 1864 Luppis made a contract with him in order to perfect the invention. The result was a submarine weapon, the Minenschiff, the first real self-propelled torpedo, officially presented to the Imperial Naval commission on December 21, 1866.

An illustration of HMS Lightning in 1877.

Late 19th century

During the mid 1800s, the ships of the line were superseded by large steam powered ships with heavy gun armament and heavy armour, named ironclads. Ultimately this line of development lead to the dreadnought all-big-gun battleship.

But at the same time, the new weight of armour slowed them, and the huge guns needed to penetrate that armour fired at very slow rates. This allowed for the possibility of a small and fast ship that could attack the battleships, at a much lower cost. The introduction of the torpedo provided a weapon that could cripple, or sink, any battleship.

The first boat designed to fire the self-propelled Whitehead torpedo was HMS Lightning, completed in 1877. The French navy followed suit in 1878 with Torpilleur No 1, launched in 1878 though she had been ordered in 1875. The Royal Norwegian Navy's HNoMS Rap—the name meaning 'fast'— was ordered from Thornycroftmarker, England in 1873, but was not equipped with self-propelled torpedoes until 1879.

The first recorded launch of torpedoes from a torpedo boat (which itself was launched from a torpedo boat tender) in an actual battle was by Russianmarker admiral Stepan Makarov on January 16, 1877, who used self-propelled Whitehead's torpedoes against a Turkish armed ship Intibah during the Russo-Turkish War of 1877-78.

In the late 19th century, many navies started to build torpedo boats 30 to 50 m in length, armed with up to three torpedo launchers and small guns. They were powered by steam engines and had a maximum speed of 20 to 30 knots (37 to 56 km/h).They were relatively inexpensive and could be purchased in quantity, allowing mass attacks on fleets of larger ships. The loss of even a squadron of torpedo boats to enemy fire would be more than outweighed by the sinking of a capital ship.

Torpedo boats sank the British battleship HMS Goliathmarker in 1915, the Austrian-Hungarian Wien in 1917 and Szent Istvan in 1918.

Introduction of torpedo boat destroyers

The introduction of the torpedo boat resulted in a flurry of activity in navies around the world, as smaller, quicker-firing guns were added to existing ships to ward off the new threat. In mid-1880s there were developed torpedo gunboats, like the Destructor, but they were considered too slow to catch torpedo boats because of the popular belief that the speeds attained by torpedo boats in trial conditions equated to speeds obtainable in service. Eventually an entirely new class of ships, the torpedo boat destroyer, was invented to counter them. These ships, which, after the turn of the century, became known simply as destroyers, were just enlarged torpedo boats, with speed equal to the torpedo boats, but including heavier guns that could attack them before they were able to close on the main fleet.

Destroyers became so much more useful, having better seaworthiness and greater capabilities than torpedo boats, that they eventually replaced most torpedo boats. However, the London Naval Treaty after World War I limited tonnage of warships, but placed no limits on ships of under 600 tons. The French, Italian, Japanese and German Navies developed torpedo boats around that displacement, 70 to 100 m long, armed with 2 or 3 guns of around 100 mm (4 in) and torpedo launchers. For example the Royal Norwegian Navy Sleipner class destroyers were in fact of a torpedo boat size, while the Italian Spica class torpedo boat were in fact Destroyer escort sized. After World War II they were eventually subsumed into the revived Corvette classification.

The Kriegsmarine torpedo boats were classified Torpedoboot with "T"-prefixed hull numbers. The classes designed in the mid-1930s, such as the Torpedo boat type 35, had few guns, relying almost entirely upon their torpedoes. This was found to be inadequate in combat, and the result was a "fleet torpedo boat" class (Flottentorpedobootmarker), which were significantly larger, up to 1,700 tons, being in fact small destroyers. This class of German boats could be highly effective, as in the action in which the British cruiser HMS Charybdis was sunk off Brittany by a torpedo salvo launched by the Elbing class torpedo boatsmarker T23 and T27.

Small torpedo craft

Japanese torpedo boat Kasumi, commissioned in 1902, displacement about 400 t.
Before World War I steam torpedo boats which were larger and more heavily armed than hitherto were being used. The new internal combustion engine generated much more power for a given weight and size than steam engines, and allowed the development of a new class of small and fast boats. These powerful engines could make use of planing hull designs, such as in the British Coastal Motor Boat, capable of much higher speed under appropriate sea conditions than displacement hulls.

The result was a small torpedo boat 50 to 100 feet (15 to 30 m) in length with maximum speed of 30 to 50 knots (56 to 93 km/h), carrying two to four torpedoes fired from simple fixed launchers and several machine guns. Such torpedo boats remained useful through World War II. The Royal Navy (RN) Motor Torpedo Boats (MTBs), Kriegsmarine 'S-Boote' (Schnellboot or "fast-boat": British termed them E-boats), (Italian) M.A.S. and M.S. and U.S.marker PT boats (standing for Patrol Torpedo) were all of this type.

A classic fast torpedo boat action was the Channel Dash in February 1942 when German E-boats and destroyers defended the flotilla of Scharnhorst, Gneisenau, Prinz Eugenmarker and several smaller ships against RN MTBs.

By World War II torpedo boats were seriously hampered by higher fleet speeds; although they still had a speed advantage, they could only catch the larger ships by running at very high speeds over very short distances, as demonstrated in the Channel Dash. An even greater threat was the widespread arrival of patrol aircraft, which could hunt down torpedo boats long before they could engage their targets.

During World War II United States naval forces employed fast wooden PT boats in the South Pacific in a number of roles in addition to the originally envisioned one of torpedo attack. PT boats performed reconnaissance, ferry, courier, search & rescue as well as attack and smoke screening duties. They took part in fleet actions and they worked in smaller groups and singly to harry enemy supply lines. Late in the Pacific War when large targets became scarce, many PT boats replaced two or all four of their torpedo tubes with additional guns for engaging enemy coastal supply boats and barges, isolating enemy-held islands from supply, reinforcement or evacuation.
Soviet torpedo boat G-5 type
The most significant military ship sunk by a torpedo boat during WWII was the cruiser HMS Manchester which was sunk by two Italian torpedo boat (M.S. 16 and M.S. 21) during Operation Pedestal on 13 August 1942.

Fast attack craft today

Boats similar to torpedo boats are still in use, but are armed with long-range anti-shipping missiles that can be used at ranges between 30 and 70 km. This reduces the need for high speed chases and gives them much more room to operate in while approaching their targets.

Aircraft are a major threat, making the use of boats against any fleet with air cover very risky. The low height of the radar mast makes it difficult to acquire and lock onto a target while maintaining a safe distance. As a result fast attack craft are being replaced for use in naval combat by larger corvettes, which are able to carry radar-guided anti-aircraft missiles for self-defense, and helicopters for over-the-horizon targeting.

Although torpedo boats have disappeared from the majority of the world's navies, they remained in use until relatively recently in a few specialised areas, most notably in the Baltic. The close confines of the Baltic and ground clutter effectively negated the range benefits of early ASM. Operating close to shore in conjunction with ground based air cover and radars, and in the case of the Norwegian navy hidden bases cut into Fjord sides, torpedo boats remained a cheap and viable deterrent to amphibious attack. Indeed this is still the operational model followed by the Chinese Navy with its Type 025 class torpedo boat for the protection of its coastal and estuarial waters.

They are still used by many navies and coast guards to police their territorial waters against smugglers, particularly those smuggling narcotics and weapons to insurgents. Heavily armed fast boats, often with the assistance of maritime patrol aircraft, are needed for the interdiction and boarding of potentially armed hostile fast boats, often indistinguishable at a distance from legitimate coastal craft.

See also

Selected torpedo boat histories


External references


  • R. Thomas Campbell, "Hunters of the Night: Confederate Torpedo Boats in the War Between the States" Burd Street Press, 2001.
  • Anthony Preston, "Destroyers", Bison Books (London) 1977. ISBN 0-600-32955-0.
  • Spanish American War The Spanish American War Centennial Website. 2007. USS OLYMPIA. 4 Nov.-Dec. 2007.

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