Amphibious vehicle

The DUKW is a six-wheel-drive amphibious modification of the 2+1⁄2-ton CCKW trucks used by the U.S. military during World War II and the Korean War.

A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious craft capable of travelling over land, water, mud, ice, and other surfaces.

A marsh is a wetland that is dominated by herbaceous rather than woody plant species. Marshes can often be found at the edges of lakes and streams, where they form a transition between the aquatic and terrestrial ecosystems. They are often dominated by grasses, rushes or reeds. If woody plants are present they tend to be low-growing shrubs, and the marsh is sometimes called a carr. This form of vegetation is what differentiates marshes from other types of wetland such as swamps, which are dominated by trees, and mires, which are wetlands that have accumulated deposits of acidic peat.

An articulated vehicle is a vehicle which has a permanent or semi-permanent pivot joint in its construction, allowing it to turn more sharply. There are many kinds, from heavy equipment to buses, trams and trains. Steam locomotives were sometimes articulated so the driving wheels could pivot around corners.

A screw-propelled vehicle is a land or amphibious vehicle designed to cope with difficult terrain, such as snow, ice, mud, and swamp. Such vehicles are distinguished by being moved by the rotation of one or more auger-like cylinders fitted with a helical flange that engages with the medium through or over which the vehicle is moving. They have been called Archimedes screw vehicles by the US military, where they are classified as a type of marginal terrain vehicle (MTV). Modern vehicles called Amphirols and other similar vehicles have specialised uses.

A hull is the watertight body of a ship, boat, or flying boat. The hull may open at the top, or it may be fully or partially covered with a deck. Atop the deck may be a deckhouse and other superstructures, such as a funnel, derrick, or mast. The line where the hull meets the water surface is called the waterline.

The displacement or displacement tonnage of a ship is its weight. As the term indicates, it is measured indirectly, using Archimedes' principle, by first calculating the volume of water displaced by the ship, then converting that value into weight. Traditionally, various measurement rules have been in use, giving various measures in long tons. Today, tonnes are more commonly used.

The litre or liter is a metric unit of volume. It is equal to 1 cubic decimetre (dm3), 1000 cubic centimetres (cm3) or 0.001 cubic metre (m3). A cubic decimetre occupies a volume of 10 cm × 10 cm × 10 cm and is thus equal to one-thousandth of a cubic metre.

Buoyancy, or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. The pressure difference results in a net upward force on the object. The magnitude of the force is proportional to the pressure difference, and is equivalent to the weight of the fluid that would otherwise occupy the submerged volume of the object, i.e. the displaced fluid.

A pump-jet, hydrojet, or water jet is a marine system that produces a jet of water for propulsion. The mechanical arrangement may be a ducted propeller, a centrifugal pump, or a mixed flow pump which is a combination of both centrifugal and axial designs. The design also incorporates an intake to provide water to the pump and a nozzle to direct the flow of water out of the pump.

A motorboat, speedboat or powerboat is a boat that is exclusively powered by an engine.

The Amphibious Vehicle, Tracked (LVT) is an amphibious warfare vehicle and amphibious landing craft, introduced by the United States Navy and United States Marine Corps. The United States Army, Canadian Army and British Army used several LVT models during World War II, and referred to those vehicles as "Landing Vehicle, Tracked."

The Battle of the Scheldt in World War II was a series of military operations led by the First Canadian Army, with Polish and British units attached, to open up the shipping route to Antwerp so that its port could be used to supply the Allies in north-west Europe. Under acting command of the First Canadian's Lieutenant-General Guy Simonds, the battle took place in northern Belgium and southwestern Netherlands from 2 October to 8 November 1944.

A polymath is an individual whose knowledge spans a substantial number of subjects, known to draw on complex bodies of knowledge to solve specific problems.

Raimondo di Sangro, Prince of Sansevero was an Italian nobleman, inventor, soldier, writer, scientist, alchemist and freemason best remembered for his reconstruction of the Sansevero Chapel in Naples.

Oliver Evans was an American inventor, engineer and businessman born in rural Delaware and later rooted commercially in Philadelphia. He was one of the first Americans building steam engines and an advocate of high pressure steam. A pioneer in the fields of automation, materials handling and steam power, Evans was one of the most prolific and influential inventors in the early years of the United States. He left behind a long series of accomplishments, most notably designing and building the first fully automated industrial process, the first high-pressure steam engine, and the first amphibious vehicle and American automobile.

Gail Borden Jr. was a native New Yorker who settled in Texas in 1829, where he worked as a land surveyor, newspaper publisher, and inventor. He created a process in 1853 to make sweetened condensed milk. Earlier, Borden helped plan the cities of Houston and Galveston in 1836.

Condensed milk is cow's milk from which water has been removed. It is most often found with sugar added, in the form of sweetened condensed milk (SCM), to the extent that the terms "condensed milk" and "sweetened condensed milk" are often used interchangeably today. Sweetened condensed milk is a very thick, sweet product, which when canned can last for years without refrigeration if not opened. The product is used in numerous dessert dishes in many countries.

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 be made from a combination of woven materials—including canvas or polyester cloth, laminated membranes or bonded filaments—usually in a three- or four-sided shape.

A chassis is the load-bearing framework of an artificial object, which structurally supports the object in its construction and function. An example of a chassis is a vehicle frame, the underpart of a motor vehicle, on which the body is mounted; if the running gear such as wheels and transmission, and sometimes even the driver's seat, are included, then the assembly is described as a rolling chassis.

The Gibbs Quadski is an amphibious quad bike/ATV, launched in October 2012 by Gibbs Sports Amphibians. The Quadski is a 4-stroke amphiquad that converts to a personal watercraft. It can attain a top speed of 72 km/h (45 mph) on both land and water, and features a proprietary marine jet propulsion system as well as wheel retraction, allowing it to transition between land and water in about five seconds.

An amphibious cycle is a human-powered vehicle capable of operation on both land and water. The design which has received the most coverage is "Saidullah’s Bicycle." The bike uses four rectangular air filled floats for buoyancy which propelled using two fan blades which were attached to the spokes. "Moraga’s Cyclo Amphibious" uses a simple tricycle frame to support three floaters which provide both the flotation and thrust. The wings on the powered wheels propel the vehicle in a similar way to a paddle wheel.

A paddle wheel is a form of waterwheel or impeller in which a number of paddles are set around the periphery of the wheel. It has several uses, of which some are:Very low-lift water pumping, such as flooding paddy fields at no more than about 0.5 m (20 in) height above the water source. To move and mix algae culture in the raceway ponds used for algaculture. Propulsion of watercraft Low head hydro power Flow sensors Aerators

An amphibious all-terrain vehicle, amphibious ATV, is a small, all-wheel drive, all-terrain amphibious vehicle, used for recreation, farm-, hunting, utility or industry tasks, by enthusiasts and professionals worldwide. They are legally off-highway vehicles in many countries, or at least restricted from use on express highways and motorways – their use is generally extra-urban.

The Volkswagen Schwimmwagen was a four-wheel drive amphibious vehicle, used extensively by German ground forces during the Second World War. The Schwimmwagen is the most-produced amphibious car in history.

An amphibious automobile is an automobile that is a means of transport viable on land as well as on or under water. They are unarmored for civilian use.

Dr. Ing. h.c. F. Porsche AG, usually shortened to Porsche, is a German automobile manufacturer specializing in high-performance sports cars, SUVs and sedans, headquartered in Stuttgart, Baden-Württemberg, Germany. The company is owned by Volkswagen AG, a controlling stake of which is owned by Porsche Automobil Holding SE. Porsche's current lineup includes the 718 Boxster/Cayman, 911 (992), Panamera, Macan, Cayenne and Taycan.

Erwin Komenda was an Austrian automobile designer and Porsche employee, and a lead contributor to the design of the bodies for the VW Beetle and various Porsche sports cars.

The Volkswagen Type 82 Kübelwagen, or simply Kübel, contractions of the original German word Kübelsitzwagen, is a military light utility vehicle designed by Ferdinand Porsche and built by Volkswagen during World War II for use by the Nazi German military. Based heavily on the Volkswagen Beetle, it was prototyped and first deployed in Poland as the Type 62, but following improvements entered full-scale production as the Type 82. Several derivative models, such as the Kommandeurswagen, were also built in hundreds, or in dozens.

The Ford GPA "Seep", with supply catalog number G504, was an amphibious version of the World War II Ford GPW jeep.

Frederick Benjamin Carlin was an Australian adventurer who was the first person to circumnavigate the world in an amphibious vehicle. Born in Northam, Western Australia, Carlin attended Guildford Grammar School in Perth, and later studied mining engineering at the Kalgoorlie School of Mines. After qualifying as an engineer, he worked on the Goldfields before emigrating to China in 1939 to work in a British coal mine. In World War II, Carlin was posted to the Indian Army Corps of Engineers, serving in India, Italy, and throughout the Middle East. After his discharge from service in 1946, he emigrated to the United States with his American wife, Elinore.

Birmabright is a trade name of the former Birmetals Co. for various types of lightweight sheet metal in an aluminium–magnesium alloy. The alloy was introduced by the Birmid Group in 1929 and was particularly noted for its corrosion resistance. Birmal Boats was created in 1930 for the building of light-alloy boats. Birmetals Ltd was formed in 1936 and during the war produced both copper bearing aluminium alloys and the Birmabright magnesium bearing alloys, mainly for aircraft production.

The Beaufort scale is an empirical measure that relates wind speed to observed conditions at sea or on land. Its full name is the Beaufort wind force scale.

The M29 Weasel is a World War II tracked vehicle designed for operation in snow. Built by Studebaker, Weasels were also used in sandy, muddy, and desert terrains, including towing loads over terrain wheeled vehicles could not negotiate as in the US Marine invasions of Iwo Jima and Okinawa.

The Assault Amphibious Vehicle (AAV)—official designation AAVP-7A1 —is a fully tracked amphibious landing vehicle manufactured by U.S. Combat Systems.

The Amphibious Vehicle, Tracked (LVT) is an amphibious warfare vehicle and amphibious landing craft, introduced by the United States Navy and United States Marine Corps. The United States Army, Canadian Army and British Army used several LVT models during World War II, and referred to those vehicles as "Landing Vehicle, Tracked."

An armoured fighting vehicle (AFV) is an armed combat vehicle protected by armour, generally combining operational mobility with offensive and defensive capabilities. AFVs can be wheeled or tracked. Examples of AFVs are tanks, armoured cars, assault guns, self-propelled guns, infantry fighting vehicles (IFV), and armoured personnel carriers (APC).

An armoured personnel carrier (APC) is a broad type of armoured military vehicle designed to transport personnel and equipment in combat zones. Since World War I, APCs have become a very common piece of military equipment around the world.

The BTR-50 is a Soviet tracked amphibious armored personnel carrier (APC) based on the PT-76 light tank chassis. The BTR-50 was developed in 1952 and entered service with the Soviet Army in 1954. It ceased production in 1970. It has the ability to transport up to 20 fully equipped infantrymen, and can be armed with nothing, a 7.62 mm SGMB medium machine gun, or a 14.5 mm KPV heavy machine gun. It saw notable service in the Six-Day War, the Yom Kippur War, and most recently in the Russo-Ukrainian War.

The MT-LB is a Soviet multi-purpose, fully amphibious, tracked armored fighting vehicle in use since the 1970s. It was also produced in Poland, where its YaMZ engine was replaced by a Polish 6-cylinder SW 680 diesel engine.

Buoyancy, or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the pressure at the bottom of a column of fluid is greater than at the top of the column. Similarly, the pressure at the bottom of an object submerged in a fluid is greater than at the top of the object. The pressure difference results in a net upward force on the object. The magnitude of the force is proportional to the pressure difference, and is equivalent to the weight of the fluid that would otherwise occupy the submerged volume of the object, i.e. the displaced fluid.

The M4 Sherman, officially Medium Tank, M4, was the most widely used medium tank by the United States and Western Allies in World War II. The M4 Sherman proved to be reliable, relatively cheap to produce, and available in great numbers. It was also the basis of several other armored fighting vehicles including self-propelled artillery, tank destroyers, and armored recovery vehicles. Tens of thousands were distributed through the Lend-Lease program to the British Commonwealth and Soviet Union. The tank was named by the British after the American Civil War General William Tecumseh Sherman.

DD or Duplex Drive tanks, nicknamed "Donald Duck tanks", were a type of amphibious swimming tank developed by the British during the Second World War. The phrase is mostly used for the Duplex Drive variant of the M4 Sherman medium tank, that was used by the Western Allies during and after the Normandy Landings in June 1944.

The Mark IX tank was a British armoured fighting vehicle from the First World War. It was the world's first specialised armoured personnel carrier (APC).

Crusader, in full "Tank, Cruiser Mk VI, Crusader", also known by its General Staff number A.15, was one of the primary British cruiser tanks during the early part of the Second World War. Over 5,000 tanks were manufactured and they made important contributions to the British victories during the North African campaign. The Crusader tank would not see active service beyond Africa but the chassis of the tank was modified to create anti-aircraft, fire support, observation, communication, bulldozer and recovery vehicle variants.

The Leopard 2 is a third generation German main battle tank (MBT). Developed by Krauss-Maffei in the 1970s, the tank entered service in 1979 and replaced the earlier Leopard 1 as the main battle tank of the West German army. Various iterations of the Leopard 2 continue to be operated by the armed forces of Germany, as well as 13 other European countries, and several non-European states around the world, including Canada, Chile, Indonesia, and Singapore. Some operating states have licensed the Leopard 2 design for local production and domestic development.

Deep wading or deep fording is a technique used by some heavy semi-amphibious vehicles to traverse water that is several metres deep - the vehicle drives on the riverbed/lakebed/seabed and uses screens or a pipe that reaches above the water surface for an air supply. The technique has been used by armoured military vehicles such as tanks and armored personnel carriers. Deep fording generally implies driving through water of such a depth that the vehicle is mostly or entirely submerged by the water, sometimes to several times the height of the vehicle itself, as well as a sealed crew compartment, complete with air supply for the crew. This makes it different from the less extreme "wading" done by many off-road vehicles which are simply fitted with a snorkel that is higher than the normal engine air intake, roughly level with the top of the cab. In these cases, the crew compartment is not watertight, and the snorkel provides air only for the engine. Thus maximum height is limited by the crew's need to breathe, and very rarely completely submerges the vehicle.

The Tiger I was a German heavy tank of World War II that operated beginning in 1942 in Africa and in the Soviet Union, usually in independent heavy tank battalions. It gave the German Army its first armoured fighting vehicle that mounted the 8.8 cm KwK 36 gun. 1,347 were built between August 1942 and August 1944. After August 1944, production of the Tiger I was phased out in favour of the Tiger II.

A vehicle snorkel is the land-based equivalent of the submarine snorkel which allows submarines to use diesel engines while submerged. Snorkels, when used by vehicles with air-breathing internal combustion engines, sometimes allow limited deep wading capability for river crossing or amphibious landing operations, particularly in the case of tanks and other armored vehicles. In such cases, the snorkel supplies air for both the engine and the sealed crew compartment, allowing total submersion. Often, the snorkel pipe is of large diameter and fits over the crew hatch, to provide an escape route for the crew in case the vehicle becomes stuck or disabled while underwater.

The T-90 is a third-generation Russian main battle tank developed from the T-72. It uses a 125 mm 2A46 smoothbore main gun, the 1A45T fire-control system, an upgraded engine, and gunner's thermal sight. Standard protective measures include a blend of steel and composite armour, smoke grenade dischargers, Kontakt-5 explosive reactive armour (ERA) and the Shtora infrared anti-tank guided missile (ATGM) jamming system.

Stilts are poles, posts or pillars that allow a person or structure to stand at a height above the ground.

A sea tractor is a motor vehicle designed to travel through shallow seawater, carrying passengers on a platform elevated above a submerged chassis. The sea tractor was most popular during the early 1930s, as a unique way to give scenic tours to patrons of waterfront hotels and resorts. In other applications, sea tractors were used simply as a ferry through shallow waters. The use of sea tractors has declined since, as boats, ferries, and other aquatic vessels often serve the same function much more efficiently and comfortably.

The Brighton and Rottingdean Seashore Electric Railway was a unique coastline railway in Brighton, England, that ran through the shallow coastal waters of the English Channel between 1896 and 1901. It was designed by Magnus Volk to extend his Volk's Electric Railway from its terminus in Paston Place to the village of Rottingdean and avoid difficult terrain. While the unique railway was popular and carried tens of thousands of passengers, it was ultimately abandoned to make room for new sea defences, and Volk was unable to raise the funds to construct a replacement.

The SR.N4 hovercraft was a combined passenger and vehicle-carrying class of hovercraft. The type has the distinction of being the largest civil hovercraft to have ever been put into service.

A hovercraft, also known as an air-cushion vehicle or ACV, is an amphibious craft capable of travelling over land, water, mud, ice, and other surfaces.

The knot is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h. The ISO standard symbol for the knot is kn. The same symbol is preferred by the Institute of Electrical and Electronics Engineers (IEEE), while kt is also common, especially in aviation, where it is the form recommended by the International Civil Aviation Organization (ICAO). The knot is a non-SI unit. The knot is used in meteorology, and in maritime and air navigation. A vessel travelling at 1 knot along a meridian travels approximately one minute of geographic latitude in one hour.

An air-cushioned landing craft, also called an LCAC, is a modern variation on the amphibious landing boat. The majority of these craft are small- to mid-sized multi-purpose hovercraft, also known as "over the beach" ("OTB") craft. This allows troops and material to access more than 70 percent of the world's coastline, while only approximately 15 percent of that coastline is available to conventional boat-type landing craft. Typical barriers to conventional landing craft are soft sandy beaches, marshes, swampland, and loose surfaces. Air cushion technology has vastly increased the landing capability of the craft, providing greater speed and flexibility over traditional landing craft.

The Landing Craft Air Cushion (LCAC) is a class of air-cushioned landing craft (hovercraft) used by the United States Navy and the Japan Maritime Self-Defense Force (JMSDF). They transport weapons systems, equipment, cargo and personnel from ship to shore and across the beach. It is to be replaced in US service by the Ship-to-Shore Connector (SSC).

The M1 Abrams is a third-generation American main battle tank designed by Chrysler Defense and named for General Creighton Abrams. Conceived for modern armored ground warfare and now one of the heaviest tanks in service at nearly 68 short tons, it introduced several modern technologies to US armored forces, including a multifuel turbine engine, sophisticated Chobham composite armor, a computer fire control system, separate ammunition storage in a blow-out compartment, and NBC protection for crew safety. Initial models of the M1 were armed with a 105 mm M68 gun, while later variants feature a license-produced Rheinmetall 120 mm L/44.

Jeremy Charles Robert Clarkson is an English broadcaster, journalist, game show host and writer who specialises in motoring. He is best known for the motoring programmes Top Gear and The Grand Tour alongside Richard Hammond and James May. He also currently writes weekly columns for The Sunday Times and The Sun. Since 2018, Clarkson has hosted the ITV game show Who Wants to Be a Millionaire?.

Richard Mark Hammond is an English journalist, television presenter, mechanic and writer. He is best known for co-hosting the BBC Two motoring programme Top Gear from 2002 until 2015 with Jeremy Clarkson and James May. Since 2016, the trio have presented Amazon Studios' The Grand Tour.

James Daniel May is an English television presenter and journalist. He is best known as a co-presenter of the motoring programme Top Gear alongside Jeremy Clarkson and Richard Hammond from 2003 until 2015. He also served as a director of the production company W. Chump & Sons, which has since ceased operating. He is a co-presenter of the television series The Grand Tour for Amazon Prime Video, alongside his former Top Gear colleagues, Clarkson and Hammond, as well as Top Gear's former executive producer Andy Wilman.

An outboard motor is a propulsion system for boats, consisting of a self-contained unit that includes engine, gearbox and propeller or jet drive, designed to be affixed to the outside of the transom. They are the most common motorised method of propelling small watercraft. As well as providing propulsion, outboards provide steering control, as they are designed to pivot over their mountings and thus control the direction of thrust. The skeg also acts as a rudder when the engine is not running. Unlike inboard motors, outboard motors can be easily removed for storage or repairs.

A cabin cruiser is a type of power boat that provides accommodation for its crew and passengers inside the structure of the craft.

A reservoir is an enlarged lake behind a dam. Such a dam may be either artificial, built to store fresh water or it may be a natural formation.

Capsizing or keeling over occurs when a boat or ship is rolled on its side or further by wave action, instability or wind force beyond the angle of positive static stability or it is upside down in the water. The act of recovering a vessel from a capsize is called righting. Capsize may result from broaching, knockdown, loss of stability due to cargo shifting or flooding, or in high speed boats, from turning too fast.

A daggerboard is a retractable centreboard used by various sailing craft. While other types of centreboard may pivot to retract, a daggerboard slides in a casing. The shape of the daggerboard converts the forward motion into a windward lift, countering the leeward push of the sail. The theoretical centre of lateral resistance is on the trailing edge of the daggerboard.

The English Channel, also known as simply the Channel, is an arm of the Atlantic Ocean that separates Southern England from northern France. It links to the southern part of the North Sea by the Strait of Dover at its northeastern end. It is the busiest shipping area in the world.

Sir Richard Charles Nicholas Branson is a British entrepreneur and business magnate. In the 1970s, he founded the Virgin Group, which today controls more than 400 companies in various fields worldwide.

France, officially the French Republic, is a country located primarily in Western Europe. It also includes overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans, giving it one of the largest discontiguous exclusive economic zones in the world. Its metropolitan area extends from the Rhine to the Atlantic Ocean and from the Mediterranean Sea to the English Channel and the North Sea; overseas territories include French Guiana in South America, Saint Pierre and Miquelon in the North Atlantic, the French West Indies, and many islands in Oceania and the Indian Ocean. Its eighteen integral regions span a combined area of 643,801 km2 (248,573 sq mi) and had a total population of over 68 million as of January 2023. France is a unitary semi-presidential republic with its capital in Paris, the country's largest city and main cultural and commercial centre; other major urban areas include Marseille, Lyon, Toulouse, Lille, Bordeaux, and Nice.

Calais is a port city in the Pas-de-Calais department, of which it is a subprefecture. Although Calais is by far the largest city in Pas-de-Calais, the department's prefecture is its third-largest city of Arras. The population of the city proper is 72,929; that of the urban area is 149,673 (2018). Calais overlooks the Strait of Dover, the narrowest point in the English Channel, which is only 34 km (21 mi) wide here, and is the closest French town to England. The White Cliffs of Dover can easily be seen on a clear day from Calais. Calais is a major port for ferries between France and England, and since 1994, the Channel Tunnel has linked nearby Coquelles to Folkestone by rail.