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Mark (designation)
The word ''mark'', followed by number, is a method of designating a version of a product. It is often abbreviated as Mk or M. This use of the word possibly originates from the use of physical marks made to measure height or progress. Furthermore, by metonymy the word mark is used to note a defined level of development or a product (business)#Product model, model number. The kind of products that use this convention vary widely in complexity. The concept shares some similarities with the ''type'' designation (in hardware), also called ''software versioning'': 1.0+ (1.1, 1.12, 2.0, 3.0, etc.), used to designate general software product releases, and other version control schemas. Thus designations like "Mark I", "Mark II", "Mark III", "Mark IV", etc. come to be used as proper names for persons and products. Application ''Mark'' refers to a mark on the modification plate of a system, component or machine. Modification plates are used to identify which modifications have already b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Mark 4
The British Rail Mark 4 is a class of Passenger car (rail), passenger carriages built for use in InterCity 225 sets on the East Coast Main Line between London King's Cross railway station, King's Cross, Leeds railway station, Leeds and Edinburgh Waverley railway station, Edinburgh. Withdrawals began in 2019, with some being sold for further use with Transport for Wales Rail, Transport for Wales between Cardiff Central railway station, Cardiff and Holyhead railway station, Holyhead. History and construction A small build compared with the British Railways Mark 2, Mark 2 and British Rail Mark 3, Mark 3 designs, 314 Mark 4 coaches were built between 1989 and 1992 by Metro-Cammell's Washwood Heath factory to operate services on the newly electrified East Coast Main Line. They were operated by London North Eastern Railway and its predecessors in 30 fixed formations of nine carriages, with a British Rail Class 91, Class 91 locomotive and Driving Van Trailer. The Mark 4 is an all-ste ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Main Battle Tank
A main battle tank (MBT), also known as a battle tank or universal tank or simply tank,Ogorkiewicz 2018 p222 is a tank that fills the role of armour-protected direct fire and maneuver in many modern armies. Cold War-era development of more powerful engines, better suspension systems and lighter composite armour allowed for the design of a tank that had the firepower of a super-heavy tank, the armour protection of a heavy tank, and the mobility of a light tank, in a package with the weight of a medium tank. The first ''designated'' MBT was the British Chieftain (tank), Chieftain tank, which during its development in the 1950s was re-designed as an MBT. Throughout the 1960s and 1970s, the MBT replaced almost all other types of tanks, leaving only some specialist roles to be filled by lighter designs or other types of armoured fighting vehicles. Main battle tanks are a key component of modern armies.Main battle tank#House1984, House (1984), ''Toward Combined Arms Warfare: A Surve ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Merkava
The Merkava (, , "chariot") is a series of main battle tanks used by the Israel Defense Forces (IDF) which are the backbone of the Armored Corps (Israel), IDF's Armored Corps. Current iterations of this tank are considered broadly equivalent to the capabilities of the M1 Abrams, Leopard 2 and the Challenger 2. The current Merkava uses the same MTU Friedrichshafen, MTU EuroPowerPack powerplant as a number of other tanks. Development began in 1970, and its first generation, the Merkava Mark 1, entered official service in 1979. Four main variants have been deployed. As of 2023, Merkava Mark 4 Barak is the latest version. The Merkava was first used extensively in the 1982 Lebanon War. The name "Merkava" was derived from the IDF's initial development program name. The tank was developed in the Merkava and Armored Combat Vehicles Division of the Ministry of Defense (Israel), Israeli Ministry of Defense, and most of its parts are manufactured in Israel. The Merkava was designed to pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mk 2 Grenade
The Mk 2 grenade (initially known as the Mk II), also nicknamed the Pineapple is a fragmentation-type anti-personnel hand grenade introduced by the U.S. armed forces in 1918. It was the standard issue anti-personnel grenade used during World War II, and also saw limited service in later conflicts, including the Korean War and Vietnam War. Replacing the failed Mk 1 grenade of 1917, it was standardized in 1920 as the Mk II, and redesignated the Mk 2 on 2 April 1945. The Mk 2 was gradually phased out of service as the M26-series (M26/M61/M57) grenade was introduced during the Korean War. Due to the tremendous quantity manufactured during World War II the Mk 2 was still in limited issue with the US Army and US Marine Corps throughout the 1950s and 1960s. The U.S. Navy was one of the last users of the Mk 2 when it was finally withdrawn from U.S. military service in 1969, replaced with the M33 series (M33/M67). Description The Mk 2 grenade did not widely replace the failed M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Army
The British Army is the principal Army, land warfare force of the United Kingdom. the British Army comprises 73,847 regular full-time personnel, 4,127 Brigade of Gurkhas, Gurkhas, 25,742 Army Reserve (United Kingdom), volunteer reserve personnel and 4,697 "other personnel", for a total of 108,413. The British Army traces back to 1707 and the Acts of Union 1707, formation of the united Kingdom of Great Britain which joined the Kingdoms of Kingdom of England, England and Kingdom of Scotland, Scotland into a Political union, single state and, with that, united the English Army and the Scots Army as the British Army. The Parliament of England, English Bill of Rights 1689 and Convention of the Estates, Scottish Claim of Right Act 1689 require parliamentary consent for the Crown to maintain a peacetime standing army. Members of the British Army swear allegiance to the Charles III, monarch as their commander-in-chief. The army is administered by the Ministry of Defence (United Kingd ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark I Tank
British heavy tanks were a series of related armoured fighting vehicles developed by the United Kingdom of Great Britain and Ireland, UK during the First World War. The Mark I was the world's first tank, a tracked, armed, and armoured vehicle, to enter combat. The name "tank" was initially a code name to maintain secrecy and disguise its true purpose. The tank was developed in 1915 to break the stalemate of trench warfare. It could survive the machine gun and small-arms fire in "no man's land", travel over difficult terrain, crush barbed wire, and cross trenches to assault fortified enemy positions with powerful armament. Tanks also carried supplies and troops. British heavy tanks are distinguished by a rhomboidal shape with a high climbing face of the track, designed to cross the wide and deep Trench warfare, trenches prevalent on the battlefields of the Western Front (World War I), Western Front. Due to the height necessary for this shape, an armed turret would have made the v ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United States Navy
The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 million tons in 2021. It has the world's largest aircraft carrier fleet, with List of aircraft carriers in service, eleven in service, one undergoing trials, two new carriers under construction, and six other carriers planned as of 2024. With 336,978 personnel on active duty and 101,583 in the Ready Reserve, the U.S. Navy is the third largest of the United States military service branches in terms of personnel. It has 299 deployable combat vessels and about 4,012 operational aircraft as of 18 July 2023. The U.S. Navy is one of six United States Armed Forces, armed forces of the United States and one of eight uniformed services of the United States. The United States Navy traces its origins to the Continental Navy, which was established during ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Mark 5A
The British Rail Mark 5A is a type of railway vehicle in use in the UK. 52 standard carriages and 14 driving trailers were built by Spanish manufacturer CAF, and were operated by TransPennine Express. They first entered service on 24 August 2019, with the last set being withdrawn with the timetable change occurring on 10 December 2023. Description TransPennine Express announced in 2016 that they were to procure 126 new vehicles from CAF, which included 66 Mark 5A locomotive-hauled coaches. They would be formed into thirteen 5-carriage sets, hauled by locomotives. This equates to 65 coaches for total service, with the 66th coach being a spare Driving Trailer. Each set is composed of 1 first class carriage with guard's area and catering provision, 1 standard class carriage with PRM toilet, 2 standard class carriages and a standard class Driving Trailer (DT). In October 2016, production started on these coaches, and in March 2017, CAF and TPE released a photo of the first co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
TransPennine Express
TransPennine Trains Limited, trading as TransPennine Express (TPE), is a British train operating company that has operated passenger services in the TransPennine Express franchise area since May 2023. It runs regional and inter-city rail services between the major cities and towns of Northern England and Scotland. The company, which is owned by DfT Operator, the government's operator of last resort, was established following poor performance by the previous commercially owned operator, also called TransPennine Express. It has carried over the rolling stock, passenger services, and branding. History During the early 2020s, the incumbent operator of the TransPennine Express franchise, FirstGroup's TransPennine Express, suffered severe disruption of its services, which was largely attributable to events such as the COVID-19 pandemic and the 2022–2023 United Kingdom railway strikes. On 11 May 2023, following numerous cancellations and service disruptions, the Department ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caledonian Sleeper
''Caledonian Sleeper'' is the collective name for overnight Sleeping car, sleeper train services between London and Scotland, in the United Kingdom. It is one of only two currently operating sleeper services on the railway in the United Kingdom – the other being the ''Night Riviera'', which runs between London and Penzance. A sleeper service has been run along the West Coast Main Line since 24 February 1873. Sleepers were historically run on the rival East Coast Main Line as well; however, all remaining sleeper services that ran on the east coast routes were withdrawn in May 1988. While InterCity (British Rail), InterCity continued to operate what would later become known as the ''Caledonian Sleeper'', it decided to remove all seating accommodation on its remaining sleeper services during the mid-1990s. The Anglo-Scottish sleeper services were transferred to ScotRail (British Rail), ScotRail on 5 March 1995; as a consequence of the privatisation of British Rail, on 31 March 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
British Rail Mark 5 (CAF)
The British Rail Mark 5 is the designation given to locomotive-hauled rail carriages built by Spanish manufacturer CAF for operation with Caledonian Sleeper. Description In 2015, the ''Caledonian Sleeper'' service, which had formed part of the ScotRail franchise, was split into a separate operation, with Serco as the new franchise operator. As part of the franchise agreement, Serco was committed to procuring new rolling stock to replace the operation's existing fleet of Mark 2 and Mark 3 passenger coaches. In February 2015, Serco signed a €200m deal with CAF to purchase 75 coaches of five different types. These are formed into a total of four 16-coach trains (London Euston to Fort William, Inverness and Aberdeen, London Euston to Edinburgh and Glasgow, plus the two respective return services), plus two coaches for Fort William-Edinburgh-Fort William, with nine coaches as spares, and are hauled by locomotives between London and Glasgow/Edinburgh, and s on unelectrifie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
