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Fingal Head Light
Fingal Head Light is an active lighthouse located at Fingal Head, New South Wales, Australia, a headland about south of Point Danger, which marks the Queensland border. History The station was first established on 19 February 1872, a wooden pole structure of approximately , holding a fixed kerosene wick burner which shone a fixed white light with an intensity of 1,000 cd. It was described by a daughter of William Arnold, the first lighthouse keeper, as being shaped like a large meat safe, mounted on a wooden structure resembling a pigeon loft. The keeper had to row from the Tweed Heads Pilot Station each day and light the lantern at sunset, and a hut was constructed for him to stay in. In October 1878 the Maritime Board of New South Wales decided to construct a modern lighthouse at the location. It was the third of five lighthouses of similar design designed by James Barnet in 1878–80, the other four being Richmond River Light, Clarence River Light (now demolished) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catadioptric
A catadioptric optical system is one where refraction and reflection are combined in an optical system, usually via lenses (dioptrics) and curved mirrors (catoptrics). Catadioptric combinations are used in focusing systems such as searchlights, headlamps, early lighthouse focusing systems, optical telescopes, microscopes, and telephoto lenses. Other optical systems that use lenses and mirrors are also referred to as "catadioptric", such as surveillance catadioptric sensors. Early catadioptric systems Catadioptric combinations have been used for many early optical systems. In the 1820s, Augustin-Jean Fresnel developed several catadioptric lighthouse reflectors. Léon Foucault developed a catadioptric microscope in 1859 to counteract aberrations of using a lens to image objects at high power. In 1876 a French engineer, A. Mangin, invented what has come to be called the Mangin mirror, a concave glass reflector with the silver surface on the rear side of the glass. The two surfaces o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crowdy Head Light
Crowdy Head Light is an active lighthouse located at Crowdy Head, a headland between Forster and Port Macquarie, New South Wales, Australia. It is registered with the Register of the National Estate. History The first station in the area was a pilot station established in 1860 at nearby Harrington, assisting ships navigating the entrance of the Manning River. The current lighthouse is the last of five lighthouses of similar design designed and built by James Barnet in 1878–80, the other four being Fingal Head Light, Clarence River Light (now demolished), Tacking Point Lighthouse and Richmond River Light. The original light was a fixed white light from a 4th order catadioptric apparatus with an intensity of less than 1,000 cd. It was manned by one keeper. In 1928 the apparatus was converted to a carbide lamp (acetylene gas), with an intensity of 1,500 cd. At the same opportunity, the light was automated. The pilot station was closed in the 1960s. In 1972 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tweed River (New South Wales)
The Tweed River is a river situated in the Northern Rivers district of New South Wales, Australia. From the middle reaches of its course, the state boundary between New South Wales and Queensland is located approximately north. The river rises on the eastern slopes of the Great Dividing Range; with its watershed bordered by the McPherson, Burringbar, Condong and Tweed ranges and containing a catchment area of . The river flows generally north east, joined by eight tributaries including the Oxley and Rous rivers before reaching its mouth at its confluence with the Coral Sea of the South Pacific Ocean, south of Point Danger; descending over its course. On its journey, it passes through the major urban centres of Murwillumbah and Tweed Heads. The river's drainage basin consists mostly of the erosion caldera of the Tweed Volcano, a huge extinct volcano of which Mount Warning is the volcanic plug. The Tweed River area has a fine subtropical climate, high rainfall and fertil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New South Wales Department Of Lands
The New South Wales Land and Property Information (NSW LPI), a division of the Department of Finance, Services and Innovation in the government of New South Wales, was the division responsible for land titles, property information, valuation, surveying, and mapping and spatial information in the Australian state of New South Wales. From 1 July 2017, the operation was transferred to Australian Registry Investments, a private consortium, under a 35-year concession with the NSW government.AUSTRALIAN REGISTRY INVESTMENTS WINS RIGHT TO OPERATE THE TITLING AND REGISTRY OPERATIONS OF LAND AND PROPERTY INFORMATION (LPI) Hastings Fund, Re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Australian Maritime Safety Authority
Australian Maritime Safety Authority (AMSA) is an Australian statutory authority responsible for the regulation and safety oversight of Australia's shipping fleet and management of Australia's international maritime obligations. The authority has jurisdiction over Australia's exclusive economic zone which covers an area of . AMSA maintains Australia's shipping registries: the generalAMSARegister a vessel/ref> and the international shipping registers.AMSAAustralian international shipping register/ref> AMSA was established in 1990 under the ''Australian Maritime Safety Authority Act 1990'' and governed by the ''Commonwealth Authorities and Companies Act 1997''. AMSA is an agency within the Department of Infrastructure and Transport. Directors are appointed by the minister. The international treaties which AMSA administers include the ''Navigation Act 2012'' and the ''Protection of the Sea (Prevention of Pollution from Ships) Act 1983''. Organised sea rescue in Australia was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transport For NSW
Transport for NSW, sometimes abbreviated to TfNSW, and pronounced as Transport for New South Wales, is an agency of the New South Wales Government established on 1 November 2011, and is the leading transport and roads agency in New South Wales, Australia. The agency is a different entity to the New South Wales Department of Transport, a department of the New South Wales Government and the ultimate parent entity of Transport for NSW. The agency's function since its creation is to build transport infrastructure and manage transport services in New South Wales. Since absorbing Roads & Maritime Services (RMS) in December 2019, the agency is also responsible for building and maintaining road infrastructure, managing the day-to-day compliance and safety for roads and waterways, and vehicle and driving license registrations. The authority reports to the New South Wales Minister for Transport, Minister for Metropolitan Roads, Minister for Regional Transport and Roads, Minister for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corbel
In architecture, a corbel is a structural piece of stone, wood or metal jutting from a wall to carry a superincumbent weight, a type of bracket. A corbel is a solid piece of material in the wall, whereas a console is a piece applied to the structure. A piece of timber projecting in the same way was called a "tassel" or a "bragger" in England. The technique of corbelling, where rows of corbels deeply keyed inside a wall support a projecting wall or parapet, has been used since Neolithic (New Stone Age) times. It is common in medieval architecture and in the Scottish baronial style as well as in the vocabulary of classical architecture, such as the modillions of a Corinthian cornice. The corbel arch and corbel vault use the technique systematically to make openings in walls and to form ceilings. These are found in the early architecture of most cultures, from Eurasia to Pre-Columbian architecture. A console is more specifically an "S"-shaped scroll bracket in the classic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bluestone
Bluestone is a cultural or commercial name for a number of dimension or building stone varieties, including: * basalt in Victoria, Australia, and in New Zealand * dolerites in Tasmania, Australia; and in Britain (including Stonehenge) * feldspathic sandstone in the US and Canada * limestone in the Shenandoah Valley in the US, from the Hainaut quarries in Soignies, Belgium, and from quarries in County Carlow, County Galway and County Kilkenny in Ireland * slate in South Australia Stonehenge The term "bluestone" in Britain is used in a loose sense to cover all of the "foreign," not intrinsic, stones and rock debris at Stonehenge. It is a "convenience" label rather than a geological term, since at least 46 different rock types are represented. One of the most common rocks in the assemblage is known as Preseli Spotted Dolerite—a chemically altered igneous rock containing spots or clusters of secondary minerals replacing plagioclase feldspar. It is a medium grained dark and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Light Characteristic
A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it. Different lights use different colours, frequencies and light patterns, so mariners can identify which light they are seeing. Abbreviations While light characteristics can be described in prose, e.g. "Flashing white every three seconds", lists of lights and navigation chart annotations use abbreviations. The abbreviation notation is slightly different from one light list to another, with dots added or removed, but it usually follows a pattern similar to the following (see the chart to the right for examples). * An abbreviation of the type of light, e.g. "Fl." for flashing, "F." for fixed. * The color of the light, e.g. "W" for white, "G" for green, "R" for red, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Battery (electricity)
An electric battery is a source of electric power consisting of one or more electrochemical cells with external connections for powering electrical devices. When a battery is supplying power, its positive terminal is the cathode and its negative terminal is the anode. The terminal marked negative is the source of electrons that will flow through an external electric circuit to the positive terminal. When a battery is connected to an external electric load, a redox reaction converts high-energy reactants to lower-energy products, and the free-energy difference is delivered to the external circuit as electrical energy. Historically the term "battery" specifically referred to a device composed of multiple cells; however, the usage has evolved to include devices composed of a single cell. Primary (single-use or "disposable") batteries are used once and discarded, as the electrode materials are irreversibly changed during discharge; a common example is the alkaline battery used ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mains Electricity
Mains electricity or utility power, power grid, domestic power, and wall power, or in some parts of Canada as hydro, is a general-purpose alternating-current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electric grid in many parts of the world. People use this electricity to power everyday items—such as domestic appliances, televisions and lamps—by plugging them into a wall outlet. The voltage and frequency of electric power differs between regions. In much of the world, a voltage (nominally) of 230 volts and frequency of 50 Hz is used. In North America, the most common combination is 120 V and a frequency of 60 Hz. Other combinations exist, for example, 230 V at 60 Hz. Travellers' portable appliances may be inoperative or damaged by foreign electrical supplies. Non-interchangeable plugs and sockets in different regions provide some protection from accidental use of appliances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quartz Halogen Lamp
A halogen lamp (also called tungsten halogen, quartz-halogen, and quartz iodine lamp) is an incandescent lamp consisting of a tungsten filament sealed in a compact transparent envelope that is filled with a mixture of an inert gas and a small amount of a halogen, such as iodine or bromine. The combination of the halogen gas and the tungsten filament produces a halogen-cycle chemical reaction, which redeposits evaporated tungsten on the filament, increasing its life and maintaining the clarity of the envelope. This allows the filament to operate at a higher temperature than a standard incandescent lamp of similar power and operating life; this also produces light with higher luminous efficacy and color temperature. The small size of halogen lamps permits their use in compact optical systems for projectors and illumination. The small glass envelope may be enclosed in a much larger outer glass bulb, which has a lower temperature, protects the inner bulb from contamination, and mak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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