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João Coutinho-class Corvette
The ''João Coutinho''-class corvettes were a series of warships built for the Portuguese Navy for service in Portugal's African and Indian colonies. Initially rated as frigates, they were downgraded first to corvettes and then patrol vessels with age. They were designed in Portugal by naval engineer Rogério de Oliveira, but the urgent need of their services in the Portuguese Colonial War meant that the construction of the ships was assigned to foreign shipyards. Six ships were built; the first three ships were built by Blohm & Voss and the remaining three by ''Empresa Nacional Bazán''. The ships were launched in 1970 and 1971. The relative cheap cost of the design led to it being the basis of several other classes in other navies. From 1970 until the end of the conflict in 1975, the corvettes were used for patrol and fire-support missions in Angola, Mozambique, Guinea and Cape Verde. After the African colonies gained their independence, the corvettes were assigned to patrol dut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Horta, Azores
Horta () is a municipality and city in the Portuguese archipelago of the Azores encompassing the island of Faial. The population in 2011 was 15,038 in an area of The city of Horta itself has a population of about 7,000. Horta's marina is a primary stop for yachts crossing the Atlantic Ocean, and its walls and walkways are covered with paintings created by visitors noting the names of their vessels, crews, and the years they visited. Peter's Cafe Sport is a bar located across from the marina that houses the island's scrimshaw museum, a collection of artifacts carved from whale tooth and jawbone. Peter's is a point of reference for transatlantic yachters and sailors. History 15th through 17th centuries In 1467 the Flemish nobleman Josse van Huerter returned to Faial on a second expedition, this time disembarking along the shore of what would be known as Horta Bay. He built a small chapel which would later form the nucleus of a small community known as Horta, a name possibly deri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frigate
A frigate () is a type of warship. In different eras, the roles and capabilities of ships classified as frigates have varied somewhat. The name frigate in the 17th to early 18th centuries was given to any full-rigged ship built for speed and maneuverability, intended to be used in scouting, escort and patrol roles. The term was applied loosely to ships varying greatly in design. In the second quarter of the 18th century, the 'true frigate' was developed in France. This type of vessel was characterised by possessing only one armed deck, with an unarmed deck below it used for berthing the crew. Late in the 19th century (British and French prototypes were constructed in 1858), armoured frigates were developed as powerful ironclad warships, the term frigate was used because of their single gun deck. Later developments in ironclad ships rendered the frigate designation obsolete and the term fell out of favour. During the Second World War the name 'frigate' was reintroduced to des ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SEMT Pielstick
SEMT Pielstick was a French company that designed and built large diesel engines. Its full name was (Company of Thermal Machines Studies). Founded in 1948, SEMT was bought by MAN Diesel in 2006 During its existence as an independent company, SEMT manufactured engines for locomotives, naval vessels, power plants, and merchant ships. Its customers included France, the United States, Russia, India and other countries. History SEMT. was created in 1946 by France's ministry for industrial production by combining five national companies: * (Saint-Nazaire), * (La Courneuve) * (Le Havre) * ( Nantes) * (Denain) The aim of the new company was to develop new engines in France that could be licensed internationally. In 1948, the first licenses were supplied to licensed engine building companies worldwide. In 1951, after its relocation at La Courneuve, the was equipped with the first test beds. The equipment, which enabled the company to speed up the development of a ne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Displacement (ship)
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. Ship displacement varies by a vessel's degree of load, from its empty weight as designed (known as "lightweight tonnage") to its maximum load. Numerous specific terms are used to describe varying levels of load and trim, detailed below. Ship displacement should not be confused with measurements of volume or capacity typically used for commercial vessels and measured by tonnage: net tonnage and gross tonnage. Calculation The process of determining a vessel's displacement begins with measuring its draft.George, 2005. p.5. This is accomplished by means of its "draft marks" (or "load lines"). A mer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Draft (hull)
The draft or draught of a ship's hull is the vertical distance between the waterline and the bottom of the hull (keel). The draught of the vessel is the maximum depth of any part of the vessel, including appendages such as rudders, propellers and drop keels if deployed. Draft determines the minimum depth of water a ship or boat can safely navigate. The related term air draft is the maximum height of any part of the vessel above the water. The more heavily a vessel is loaded, the deeper it sinks into the water, and the greater its draft. After construction, the shipyard creates a table showing how much water the vessel displaces based on its draft and the density of the water (salt or fresh). The draft can also be used to determine the weight of cargo on board by calculating the total displacement of water, accounting for the content of the ship's bunkers, and using Archimedes' principle. The closely related term "trim" is defined as the difference between the forward and aft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beam (nautical)
The beam of a ship is its width at its widest point. The maximum beam (BMAX) is the distance between planes passing through the outer extremities of the ship, beam of the hull (BH) only includes permanently fixed parts of the hull, and beam at waterline (BWL) is the maximum width where the hull intersects the surface of the water. Generally speaking, the wider the beam of a ship (or boat), the more initial stability it has, at the expense of secondary stability in the event of a capsize, where more energy is required to right the vessel from its inverted position. A ship that heels on her ''beam ends'' has her deck beams nearly vertical. Typical values Typical length-to-beam ratios ( aspect ratios) for small sailboats are from 2:1 (dinghies to trailerable sailboats around ) to 5:1 (racing sailboats over ). Large ships have widely varying beam ratios, some as large as 20:1. Rowing shells designed for flatwater racing may have length to beam ratios as high as 30:1, while a cor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gunboat
A gunboat is a naval watercraft designed for the express purpose of carrying one or more guns to bombard coastal targets, as opposed to those military craft designed for naval warfare, or for ferrying troops or supplies. History Pre-steam era In the age of sail, a gunboat was usually a small undecked vessel carrying a single smoothbore cannon in the bow, or just two or three such cannons. A gunboat could carry one or two masts or be oar-powered only, but the single-masted version of about length was most typical. Some types of gunboats carried two cannons, or else mounted a number of swivel guns on the railings. The small gunboat had advantages: if it only carried a single cannon, the boat could manoeuvre in shallow or restricted areas – such as rivers or lakes – where larger ships could sail only with difficulty. The gun that such boats carried could be quite heavy; a 32-pounder for instance. As such boats were cheap and quick to build, naval forces favoured swarm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese Empire
The Portuguese Empire ( pt, Império Português), also known as the Portuguese Overseas (''Ultramar Português'') or the Portuguese Colonial Empire (''Império Colonial Português''), was composed of the overseas colonies, factories, and the later overseas territories governed by Portugal. It was one of the longest-lived empires in European history, lasting almost six centuries from the conquest of Ceuta in North Africa, in 1415, to the transfer of sovereignty over Macau to China in 1999. The empire began in the 15th century, and from the early 16th century it stretched across the globe, with bases in North and South America, Africa, and various regions of Asia and Oceania. The Portuguese Empire originated at the beginning of the Age of Discovery, and the power and influence of the Kingdom of Portugal would eventually expand across the globe. In the wake of the Reconquista, Portuguese sailors began exploring the coast of Africa and the Atlantic archipelagos in 1418–1419, u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Colonial Cape Verde
Cape Verde was a colony of the Portuguese Empire from the initial settlement of the Cape Verde Islands in 1462 until the independence of Cape Verde in 1975. History 15th century The islands of Cape Verde was discovered in 1444 by Dom Prince Henry The Navigator (Son of King John 1) and Antonio Noli in the service of Henrys relative King Afonso V. The southeastern islands, including the largest island Santiago, were discovered in 1460 by António de Noli and Diogo Gomes. The remaining northwestern islands São Nicolau, São Vicente and Santo Antão were discovered in 1461 or 1462 by Diogo Afonso.Valor simbólico do centro histórico da Praia Lourenço Conceição Gomes, Universidade Portucalense, 2008 There is no evidence of human settlement on Cape Verde prior to the arrival of the Portuguese. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese Guinea
Portuguese Guinea ( pt, Guiné), called the Overseas Province of Guinea from 1951 until 1972 and then State of Guinea from 1972 until 1974, was a West African colony of Portugal from 1588 until 10 September 1974, when it gained independence as Guinea-Bissau. Slave trade The Portuguese Crown commissioned its navigators to explore the Atlantic coast of West Africa in the 1430s, to find sources of gold. At that time the gold trade was controlled by Morocco. Muslim caravans across the Sahara also carried salt, kola, textiles, fish, grain, and slaves. The navigators first passed the obstruction of Cape Bojador in 1437 and were able to explore the West African coast as far as Sierra Leone by 1460 and colonize the Portuguese Cape Verde, Cape Verde islands beginning in 1456.C.R. Boxer, (1977). The Portuguese seaborne empire, 1415–1825, pp. 26–7, 30 London, Hutchinson & Co. The gold ultimately came from the upper reaches of the Niger and Volta Rivers and the Portuguese crown wanted ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese Mozambique
Portuguese Mozambique ( pt, Moçambique) or Portuguese East Africa (''África Oriental Portuguesa'') were the common terms by which Mozambique was designated during the period in which it was a Portuguese Empire, Portuguese colony. Portuguese Mozambique originally constituted a string of Portuguese possessions along the south-east African coast, and later became a unified colony, which now forms the Republic of Mozambique. Portuguese trading settlements—and later, colonies—were formed along the coast and into the Zambezi basin from 1498 when Vasco da Gama first reached the Mozambican coast. Lourenço Marques (explorer), Lourenço Marques explored the area that is now Maputo Bay in 1544. The Portuguese increased efforts for occupying the interior of the colony after the Scramble for Africa, and secured political control over most of its territory in 1918, facing the resistance of Africans during the process. Some territories in Mozambique were handed over in the late 19th cent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portuguese Angola
Portuguese Angola refers to Angola during the historic period when it was a territory under Portuguese rule in southwestern Africa. In the same context, it was known until 1951 as Portuguese West Africa (officially the State of West Africa). Initially ruling along the coast and engaging in military conflicts with the Kingdom of Kongo, in the 18th century Portugal gradually managed to colonise the interior Highlands. However, full control of the entire territory was not achieved until the beginning of the 20th century, when agreements with other European powers during the Scramble for Africa fixed the colony's interior borders. On 11 June 1951, the status was upgraded to Overseas Province of Angola and finally in 1973, State of Angola. In 1975, Portuguese Angola became the independent People's Republic of Angola. History The history of Portuguese presence on the territory of contemporary Angola lasted from the arrival of the explorer Diogo Cão in 1484 until the decolonizatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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