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Diamond (1823 Ship)
''Diamond'' was a three-masted square rigger, built in New York City in 1823. She was one of the first ships to operate a regular service for passenger and cargo between Britain and the United States. She sank en route to Liverpool from New York on 2 January 1825 in Cardigan Bay. The alleged wreck site was identified in 2000 and was designated under the Protection of Wrecks Act 1973 on 1 April 2002, the first such designation by the National Assembly for Wales. However, the identification has since been called into question. Construction and sailing life When ''Diamond'' was built in 1823, shipbuilding was undergoing rapid technological change. New materials and shipbuilding techniques were being used and ships of this period show many variations. ''Diamond'' has been claimed (but without evidence) to have been the oldest known example of a composite American hull, where iron frames reinforce a timber frame and plank construction. The hull was sheathed in copper, to protec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Square Rig
Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called ''yards'' and their tips, outside the lifts, are called the ''yardarms.'' A ship mainly rigged so is called a square-rigger. The square rig is aerodynamically the most efficient running rig (i.e., sailing downwind), and stayed popular on ocean-going sailing ships until the end of the Age of Sail. The last commercial sailing ships, windjammers, were usually square-rigged four-masted barques. History The oldest archaeological evidence of use of a square-rig on a vessel is an image on a clay disk from Mesopotamia from 5000 BC. Single sail square rigs were used by the ancient Egyptians, the Phoenicians, the Greeks, the Romans, and the Celts. Later the Scandinavians, the Germanic peoples, and the Slavs adopted the single square-rigged sail, with it be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cadw
(, a Welsh verbal noun meaning "keeping/preserving") is the historic environment service of the Welsh Government and part of the Tourism and Culture group. works to protect the historic buildings and structures, the landscapes and heritage sites of Wales, to make them available for the public to visit, enjoy, and understand their significance. manages 127 state-owned properties and sites. It arranges events at its managed properties, provides lectures and teaching sessions, offers heritage walks, and hosts an online shop. Members of the public can become members of to gain membership privileges. Aims and objectives As the Welsh Government's historic environment service, is charged with protecting the historic environment of Wales, and making it accessible to members of the public. To this end, in 2010–11 it identified four aspects of its work: it would take measures to conserve the heritage of Wales, its ancient buildings, and monuments; it would aim to sustain the dist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Maritime Incidents In 1825
Maritime may refer to: Geography * Maritime Alps, a mountain range in the southwestern part of the Alps * Maritime Region, a region in Togo * Maritime Southeast Asia * The Maritimes, the Canadian provinces of Nova Scotia, New Brunswick, and Prince Edward Island * Maritime County, former county of Poland, existing from 1927 to 1939, and from 1945 to 1951 * Neustadt District, Reichsgau Danzig-West Prussia, known from 1939 to 1942 as ''Maritime District'', a former district of Reichsgau Danzig-West Prussia, Nazi Germany, from 1939 to 1945 * The Maritime Republics, thalassocratic city-states on the Italian peninsula during the Middle Ages Museums * Maritime Museum (Belize) * Maritime Museum (Macau), China * Maritime Museum (Malaysia) * Maritime Museum (Stockholm) The Maritime Museum ( sv, Sjöhistoriska museet) in Stockholm, Sweden is a museum for naval history, merchant shipping and shipbuilding. Located in the Gärdet section of the inner-city district Östermalm, the museum offer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protected Wrecks Of Wales
Protection is any measure taken to guard a thing against damage caused by outside forces. Protection can be provided to physical objects, including organisms, to systems, and to intangible things like civil and political rights. Although the mechanisms for providing protection vary widely, the basic meaning of the term remains the same. This is illustrated by an explanation found in a manual on electrical wiring: Some kind of protection is a characteristic of all life, as living things have evolved at least some protective mechanisms to counter damaging environmental phenomena, such as ultraviolet light. Biological membranes such as bark on trees and skin on animals offer protection from various threats, with skin playing a key role in protecting organisms against pathogens and excessive water loss. Additional structures like scales and hair offer further protection from the elements and from predators, with some animals having features such as spines or camouflage servin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Malvern Archaeological Diving Unit
Malvern or Malverne may refer to: Places Australia * Malvern, South Australia, a suburb of Adelaide * Malvern, Victoria, a suburb of Melbourne * City of Malvern, a former local government area near Melbourne * Electoral district of Malvern, an electoral district in Victoria England * Malvern, Worcestershire, a spa town and civil parish * Malvern Hills, a ridge of hills on the boundary of Herefordshire and Worcestershire United States * Malvern, Alabama, a town * Malvern, Arkansas, a city * Malvern, Illinois, an unincorporated community in Whiteside County, Illinois * Malvern, Iowa, a city * Malverne, New York, a village * Malvern, Ohio, a village * Malvern, Pennsylvania, a borough * Malvern, Wisconsin, an unincorporated community Elsewhere * Malvern, Barbados, a town in the parish of Saint Joseph * Malvern, Jamaica, a village in the parish of Saint Elizabeth * Malvern, Gauteng, a suburb of Johannesburg, South Africa * Malvern, New Zealand, a village now called Sheffi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Remotely Operated Underwater Vehicle
A remotely operated underwater vehicle (technically ROUV or just ROV) is a tethered underwater mobile device, commonly called ''underwater robot''. Definition This meaning is different from remote control vehicles operating on land or in the air. ROVs are unoccupied, usually highly maneuverable, and operated by a crew either aboard a vessel/floating platform or on proximate land. They are common in deepwater industries such as offshore hydrocarbon extraction. They are linked to a host ship by a neutrally buoyant tether or, often when working in rough conditions or in deeper water, a load-carrying umbilical cable is used along with a tether management system (TMS). The TMS is either a garage-like device which contains the ROV during lowering through the splash zone or, on larger work-class ROVs, a separate assembly which sits on top of the ROV. The purpose of the TMS is to lengthen and shorten the tether so the effect of cable drag where there are underwater currents is minimize ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Side-scan Sonar
Side-scan sonar (also sometimes called side scan sonar, sidescan sonar, side imaging sonar, side-imaging sonar and bottom classification sonar) is a category of sonar system that is used to efficiently create an image of large areas of the sea floor. Uses Side-scan sonar may be used to conduct surveys for marine archaeology; in conjunction with seafloor samples it is able to provide an understanding of the differences in material and texture type of the seabed. Side-scan sonar imagery is also a commonly used tool to detect debris items and other obstructions on the seafloor that may be hazardous to shipping or to seafloor installations by the oil and gas industry. In addition, the status of pipelines and cables on the seafloor can be investigated using side-scan sonar. Side-scan data are frequently acquired along with bathymetric soundings and sub-bottom profiler data, thus providing a glimpse of the shallow structure of the seabed. Side-scan sonar is also used for fisheries ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Archaeological Diving Unit
Archaeology or archeology is the scientific study of human activity through the recovery and analysis of material culture. The archaeological record consists of artifacts, architecture, biofacts or ecofacts, sites, and cultural landscapes. Archaeology can be considered both a social science and a branch of the humanities. It is usually considered an independent academic discipline, but may also be classified as part of anthropology (in North America – the four-field approach), history or geography. Archaeologists study human prehistory and history, from the development of the first stone tools at Lomekwi in East Africa 3.3 million years ago up until recent decades. Archaeology is distinct from palaeontology, which is the study of fossil remains. Archaeology is particularly important for learning about prehistoric societies, for which, by definition, there are no written records. Prehistory includes over 99% of the human past, from the Paleolithic until ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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