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Boom (navigational Barrier)
A boom or a chain (also boom defence, harbour chain, river chain, chain boom, boom chain or variants) is an obstacle strung across a navigable stretch of water to control or block navigation. They are sometimes mixed with pile barrages. In modern times they usually have civil uses, such as to prevent access to a dangerous river channel. But, especially historically, they have been used militarily, with the goal of denying access to an enemy's ships: a modern example is the anti-submarine net. Booms have also been used to force passing vessels to pay a toll. Description A boom generally floats on the surface, while a chain can be on the surface or below the water. A chain could be made to float with rafts, logs, ships or other wood, making the chain a boom as well. Historical uses Especially in medieval times, the end of a chain could be attached to a chain tower or boom tower. This allowed safe raising or lowering of the chain, as they were often heavily fortified. By raising o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siege Of Londonderry Boom Detail
A siege () . is a military blockade of a city, or fortress, with the intent of conquering by attrition, or by well-prepared assault. Siege warfare (also called siegecrafts or poliorcetics) is a form of constant, low-intensity conflict characterized by one party holding a strong, static, defensive position. Consequently, an opportunity for negotiation between combatants is common, as proximity and fluctuating advantage can encourage diplomacy. A siege occurs when an attacker encounters a city or fortress that cannot be easily taken by a quick assault, and which refuses to surrender (military), surrender. Sieges involve surrounding the target to block provision of supplies and reinforcement or escape of troops (a tactic known as "investment (military), investment"). This is typically coupled with attempts to reduce the fortifications by means of siege engines, artillery bombardment, mining (military), mining (also known as sapping), or the use of deception or treachery to bypass ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hudson River Chain
The Hudson River Chains were a series of boom (navigational barrier), chain booms constructed across the Hudson River at West Point, New York, West Point by Continental Army forces from 1776 to 1778 during the American Revolutionary War. These served as defenses preventing Kingdom of Great Britain, British naval vessels from sailing upriver and were overseen by the Departments of the Continental Army#Highlands Department, Highlands Department of the Continental Army. The first chain was destroyed by British forces in the aftermath of the Battle of Forts Clinton and Montgomery in October 1777. The more significant and successful was the Great Chain, constructed in 1778 and used through war's end in 1782. Two other barriers across the river, referred to as ''Cheval de frise, chevaux-de-frise'', were undertaken by the Colonials; the first, between Fort Washington (Manhattan), Fort Washington, on the island of Manhattan, and Fort Lee Historic Park, Fort Lee, in Fort Lee, New Jersey, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battle Of Vuelta De Obligado
The Battle of Vuelta de Obligado took place on 20 November 1845, in the waters of the Paraná River, on its right bank and in the north of the province of Buenos Aires (Argentina), in a bend where the river narrows and turns, known as Vuelta de Obligado, in what is today the town of Obligado, in San Pedro district. It confronted the Province of Buenos Aires, governed by Brigadier Juan Manuel de Rosas – who appointed General Lucio Norberto Mansilla as commander of the defense forces – and the Anglo-French squadron, whose intervention was carried out under the pretext of achieving pacification in the face of the problems existing between Buenos Aires and Montevideo. The Europeans intended to establish direct trade relations between Britain and France with the provinces of Santa Fe, Entre Ríos and Corrientes, without going through Buenos Aires or recognizing Rosas' authority as the person in charge of foreign relations for the Argentine Confederation. Background During ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parana River
Paraná, Paranã or Parana may refer to: Geology *Paraná Basin, a sedimentary basin in South America Places In Argentina *Paraná, Entre Ríos, a city * Paraná Department, a part of Entre Ríos Province In Brazil *Paraná (state), a state in the South of Brazil * Paraná, Rio Grande do Norte, a town * Paraná Province, one of the provinces of the Empire of Brazil * Paranã, a city in the state of Tocantins * Ji-Paraná, a city in the state of Rondônia Rivers *Paraná River, a river that flows through Brazil, Paraguay, and Argentina ** Paraná Delta, at the mouth of Paraná River * Paranã River, a river in the state of Goiás, Brazil * Paraná Urariá, a river in the state of Amazonas, Brazil Other * ARA ''Paraná'', several ships of the Argentine Navy * Ji-Paraná Futebol Clube, a football team from Ji-Paraná, Rondônia state *Paraná Clube, a football team in the Vila Capanema district of Curitiba, Paraná * Paraná (footballer), Brazilian association footballer *P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raid On The Medway
The Raid on the Medway, during the Second Anglo-Dutch War in June 1667, was a successful attack conducted by the Dutch navy on English warships laid up in the fleet anchorages off Chatham Dockyard and Gillingham in the county of Kent. At the time, the fortress of Upnor Castle and a barrier chain called the "Gillingham Line" were supposed to protect the English ships. The Dutch, under nominal command of Willem Joseph van Ghent and Lieutenant-Admiral Michiel de Ruyter, over several days bombarded and captured the town of Sheerness, sailed up the Thames Estuary to Gravesend, then sailed into the River Medway to Chatham and Gillingham, where they engaged fortifications with cannon fire, burned or captured three capital ships and ten more ships of the line, and captured and towed away the flagship of the English fleet, , the stern of which is still on display at the Rijksmuseum in Amsterdam. Politically, the raid was disastrous for the war plans of Charles II of England. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River Medway
The River Medway is a river in South East England. It rises in the High Weald AONB, High Weald, West Sussex and flows through Tonbridge, Maidstone and the Medway conurbation in Kent, before emptying into the Thames Estuary near Sheerness, a total distance of . About of the river lies in East Sussex, with the remainder being in Kent. The Medway has a Drainage basin, catchment area of , the second largest in southern England after the River Thames, Thames. The map opposite shows only the major tributaries: a more detailed map shows the extensive network of smaller streams feeding into the main river. Those tributaries rise from points along the North Downs, the Weald and Ashdown Forest. Tributaries The major tributaries are: * River Eden, Kent, River Eden * River Bourne, Kent, River Bourne, known in the past as the Shode or Busty * River Teise, major sub-tributary River Bewl * River Beult * Loose Stream * River Len Minor tributaries include: * Wateringbury Stream * East Mal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tiber
The Tiber ( ; ; ) is the List of rivers of Italy, third-longest river in Italy and the longest in Central Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing through Tuscany, Umbria, and Lazio, where it is joined by the River Aniene, to the Tyrrhenian Sea, between Ostia (Rome), Ostia and Fiumicino. It Drainage basin, drains a basin estimated at . The river has achieved lasting fame as the main watercourse of the city of Rome, which was founded on its eastern banks. The river rises at Mount Fumaiolo in Central Italy and flows in a generally southerly direction past Perugia and Rome to meet the sea at Ostia (town), Ostia. The Tiber has advanced significantly at its mouth, by about , since Roman times, leaving the ancient port of Ostia Antica (archaeological site), Ostia Antica inland."Tiber River". ''Encyclopædia Britannica''. 2006 However, it does not form a proportional river delta, delta, owing to a strong north-flowing sea current close to the shore, d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leonine Wall
Leonine may refer to: Literature * Leonine Prayers, 1884–1965 * Leonine Sacramentary, a seventh-century codex * Leonine verse, in Medieval Latin poetry * Leonine, a minor character in Shakespeare's ''Pericles, Prince of Tyre'' Places in Rome * Leonine City * Leonine College, for priests Other uses * Leonine (coin), a debased penny used in England * Leonine facies Leonine facies is a Facies (medical), facies that resembles that of a lion. It is seen in multiple conditions and has been classically described for lepromatous leprosy as well as Paget's disease of bone. It is a dermatological symptom, with charact ..., a facial deformity * Leonine Holding, a German media company See also * Lenine (other) * Leonina (other) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portsmouth Harbour
Portsmouth Harbour is a / biological Site of Special Scientific Interest between Portsmouth and Gosport in Hampshire. It is a Ramsar site and a Special Protection Area. It is a large natural harbour in Hampshire, England. Geographically it is a ria: formerly it was the valley of a stream flowing from Portsdown into the Solent. At its north end is Portchester Castle, of Roman Britain, Roman origin and the first fortress built to protect the harbour. The mouth of the harbour provides access to the Solent. It is best known as the home of the Royal Navy, HMNB Portsmouth. Because of its strategic location on the south coast of England, protected by the natural defence of the Isle of Wight, it has since the Middle Ages been the home to England's (and later United Kingdom, Britain's) navy. The narrow entrance, and the forts surrounding it gave it a considerable advantage of being virtually impregnable to attack from the sea. Before the fortifications were built the French burned ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fort Blockhouse
Fort Blockhouse is a former military establishment in Gosport, Hampshire, England, and the final version of a complicated site. At its greatest extent in the 19th century, the structure was part of a set of fortifications which encircled much of Gosport. It is surrounded on three sides by water and provides the best view of the entrance to Portsmouth Harbour. As HMS Dolphin (shore establishment), HMS ''Dolphin'', the fort was for most of the 20th century the home of the Royal Navy Submarine Service. It is unique in that it was built over five centuries from its original construction as a chain tower, blockhouse in 1431 to the final addition of submarine base structures in the mid-1960s. Coastal fortification was abolished nationally in 1956; the submarines left in the 1990s and the fort has not been used in a military capacity since 2021. The Ministry of Defence (United Kingdom), MoD plans to dispose of the site in 2025. History Early fortifications (1431–1667) Followin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cothon
A cothon () is an artificial, protected inner harbour such as that in Carthage during the Punic Wars 200 BC. Cothons were generally found in the Phoenician world. Other examples include Motya in Sicily from the 6th century BC, which performed an uncertain purpose, (measuring 35 metres x 51 metres), although it has been suggested this cothon might even have been closable and drainable to form a dry dock, Mahdia in Tunisia from the 7th century BC, (which measured 72 metres x 56 metres) and one from Kition in Cyprus. In ancient times "cothon" was only used to describe the harbour at Carthage. In modern times, however, archaeologists use the term to refer to similar ancient harbours constructed of a man-made basin connected to the sea by a channel. The name comes from an island in Carthage's harbour. The harbours of Carthage The cothon at Carthage was divided into a rectangular merchant harbour followed by an inner protected harbour reserved for military use only. This inner ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
