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Little Sea Hill Light
Sea Hill Lighthouse, also known as Sea Hill Point Light or Little Sea Hill Light, is a lighthouse on the northwest point of Curtis Island, Gladstone Region, Queensland, Australia. Its purpose was to mark the east side of the entrance to Keppel Bay, on passage to Fitzroy River and Port Alma. The first lighthouse at the locations was constructed in 1873 or 1876, moved in the 1920s, and is now on display at the Gladstone Maritime Museum. A second lighthouse was constructed in 1895 and its state is unclear. History First lighthouse The need for a lighthouse at this location was identified in 1864. The first lighthouse, constructed in 1873 or 1876, was the first in Queensland of its design, made of a hardwood frame clad with corrugated iron. This design was then used in seven more lighthouses, by order of establishment, Grassy Hill Light, Goods Island Light, Bay Rock Light, Old Caloundra Light, North Point Hummock Light (demolished), Gatcombe Head Light (demolished) and Bulw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtis Island (Queensland)
Curtis Island is a locality in the Gladstone Region, Queensland, Australia. In the , Curtis Island had a population of 323 people. The towns of Beachton and Southend are within the locality. Geography Curtis Island occupies almost all of the island from which it takes its name, except for a very small area in the south of the island which is included in the locality of Gladstone Harbour. Most of the island is protected from development. Most of ocean-facing eastern side of the island is within either the Curtis Island National Park or the Curtis Island Conservation Park. Most of the mainland-facing western side of the island is within the Curtis Island State Forest. The town Beachton is on the northern-western coast of the island () Beachton has some housing along the beachfront but many of its blocks of land are undeveloped. On the south western coast there is an industrial area consisting of three liquid natural gas facilities () with port facilities for export. On th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bay Rock Light
Bay Rock Light is an inactive lighthouse which used to be located on Bay Rock, a rocky islet northwest of Magnetic Island, about north of Townsville, Queensland, Australia. First lit in 1886, it was automated in 1920 and deactivated in the 1980s. It was relocated in 1992 to the Townsville Maritime Museum, where it is now displayed. History Bay Rock Light was first lit in 1886. It was originally located on Bay Rock, at location , its main use being assisting vessels into a quarantine station on West Point, Magnetic Island. It also assisted passage into Cleveland Bay or to a main shipping anchorage off Bay Rock. The lighthouse was high, made of a timber frame clad with zinc- annealed galvanized corrugated iron sheets. It was the fourth in a group of eight lighthouses made of hardwood frame clad with corrugated iron, which included, by order of establishment Little Sea Hill Light, Grassy Hill Light, Goods Island Light, itself, Old Caloundra Light, North Point Hummock Light ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Lights
A list of lights is a publication describing lighthouses and other aids to maritime navigation. Most such lists are published by national hydrographic offices. Some nations, including the United Kingdom and the United States, publish lists that cover the whole world in many volumes. Other nations publish lists that cover only their own coasts. Canada The Canadian Coast Guard publishes the ''List of Lights, Buoys and Fog Signals'' in four volumes which are updated periodically *Newfoundland and Labrador *Inland Waters *Atlantic Coast * Pacific Coast The books are available in paper from dealers. As well, HTML and PDF formats updated up to the latest version of the Monthly Notices to Mariners can be viewed online. The PDF format is also available for free download. Chile The Chilean official list of lighthouses is the ''Lista de Faros de la costa de Chile, Costa Oriental de Tierra del Fuego y Territorio Antártico'' published (as Nr. 3007) by the Hydrographic and Oceanograph ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pilot Station
Pilot Station ( esu, Tuutalgaq) is a city in Kusilvak Census Area, Alaska, United States. The population was 568 at the 2010 census, up from 550 in 2000. Geography Pilot Station is located at (61.936050, -162.883403), on the northern bank of the lower Yukon River, approximately eighty miles ('as the crow flies') from the Bering Sea. According to the United States Census Bureau, the city has a total area of , of which is land and (25.55%) is water. Demographics Pilot Station first appeared on the 1890 U.S. Census as the unincorporated Inuit village of "Ankahchagmiut." It did not report again until 1920, then as Pilot Station. It formally incorporated in 1969. At the 2000 census, there were 550 people, 109 households and 92 families residing in the city. The population density was . There were 126 housing units at an average density of . The racial makeup was 96.91% Native American, 2.36% White and 0.73% from two or more races. There were 109 households, of which 61.5% had ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tideland ML-300
Tideland Signal, sometimes referred to as Tidelands, was a Privately held company, privately held, Houston, Texas based manufacturer of marine navigational aids, with main offices in Lafayette, Louisiana, Vancouver, British Columbia, Canada, Burgess Hill, Burgess Hill, UK, Dubai, United Arab Emirates and Singapore. It was the manufacturer of the ML-300 lantern, widely used in lighthouses around the world for more than 50 years. In 2016, Tideland was acquired by Xylem. In 2020 it ceased operations. History Tideland Signal was founded by several salesmen of Automatic Power, a battery manufacturer which was then a primary player in the buoy market. The company originally sold directly to Automatic's market, but with limited success. During the 1960s, solar cells had started to become practical systems for recharging batteries in remote locations. Hoffman Electronics, a pioneer in solar power, had approached Automatic with the idea of placing panels on their buoys to reduce the numbe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sun Valve
A sun valve (''Swedish: solventil'', "solar valve") is a flow control valve that automatically shuts off gas flow during daylight. It earned its inventor Gustaf Dalén the 1912 Nobel Prize in Physics. Subsequently other variants of sun valve were developed for various different uses. Dalén's valve The valve was the key component of the Dalén light used in lighthouses from the 1900s through the 1960s, by which time electric lighting was dominant. Prominent engineers, such as Thomas Edison, doubted that the device could work. The German patent office required a demonstration before approving the patent application. Design The valve is controlled by four metal rods enclosed in a glass tube. The central rod that is blackened is surrounded by the three polished rods. As sunlight falls onto all of the rods, the absorbed heat of the sun expands the dark rod, switching a valve to cut the gas supply. After sunset, the central rod cools down, contracting to become the same length as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acetylene Gas
Acetylene (systematic name: ethyne) is the chemical compound with the formula and structure . It is a hydrocarbon and the simplest alkyne. This colorless gas is widely used as a fuel and a chemical building block. It is unstable in its pure form and thus is usually handled as a solution. Pure acetylene is odorless, but commercial grades usually have a marked odor due to impurities such as divinyl sulfide and phosphine.Compressed Gas Association (1995Material Safety and Data Sheet – Acetylene As an alkyne, acetylene is unsaturated because its two carbon atoms are bonded together in a triple bond. The carbon–carbon triple bond places all four atoms in the same straight line, with CCH bond angles of 180°. Discovery Acetylene was discovered in 1836 by Edmund Davy, who identified it as a "new carburet of hydrogen". It was an accidental discovery while attempting to isolate potassium metal. By heating potassium carbonate with carbon at very high temperatures, he produced a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Annealing (metallurgy)
In metallurgy and materials science, annealing is a heat treatment that alters the physical and sometimes chemical properties of a material to increase its ductility and reduce its hardness, making it more workable. It involves heating a material above its recrystallization temperature, maintaining a suitable temperature for an appropriate amount of time and then cooling. In annealing, atoms migrate in the crystal lattice and the number of dislocations decreases, leading to a change in ductility and hardness. As the material cools it recrystallizes. For many alloys, including carbon steel, the crystal grain size and phase composition, which ultimately determine the material properties, are dependent on the heating rate and cooling rate. Hot working or cold working after the annealing process alters the metal structure, so further heat treatments may be used to achieve the properties required. With knowledge of the composition and phase diagram, heat treatment can be used to ad ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zinc
Zinc is a chemical element with the symbol Zn and atomic number 30. Zinc is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table. In some respects, zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size.The elements are from different metal groups. See periodic table. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting, and final extraction using electricity ( electrowinning). Zinc is an essential trace element for humans, animals, plants and for microorganisms and is necessary for prenatal and postnatal development. It ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Hill Lighthouse
Sea Hill Lighthouse, also known as Sea Hill Point Light or Little Sea Hill Light, is a lighthouse on the northwest point of Curtis Island, Gladstone Region, Queensland, Australia. Its purpose was to mark the east side of the entrance to Keppel Bay, on passage to Fitzroy River and Port Alma. The first lighthouse at the locations was constructed in 1873 or 1876, moved in the 1920s, and is now on display at the Gladstone Maritime Museum. A second lighthouse was constructed in 1895 and its state is unclear. History First lighthouse The need for a lighthouse at this location was identified in 1864. The first lighthouse, constructed in 1873 or 1876, was the first in Queensland of its design, made of a hardwood frame clad with corrugated iron. This design was then used in seven more lighthouses, by order of establishment, Grassy Hill Light, Goods Island Light, Bay Rock Light, Old Caloundra Light, North Point Hummock Light (demolished), Gatcombe Head Light (demolished) and Bulwer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouse For Sea Hill, Keppel Bay, 1895
A lighthouse is a tower, building, or other type of physical structure designed to emit light from a system of lamps and lenses and to serve as a beacon for navigational aid, for maritime pilots at sea or on inland waterways. Lighthouses mark dangerous coastlines, hazardous shoals, reefs, rocks, and safe entries to harbors; they also assist in aerial navigation. Once widely used, the number of operational lighthouses has declined due to the expense of maintenance and has become uneconomical since the advent of much cheaper, more sophisticated and effective electronic navigational systems. History Ancient lighthouses Before the development of clearly defined ports, mariners were guided by fires built on hilltops. Since elevating the fire would improve the visibility, placing the fire on a platform became a practice that led to the development of the lighthouse. In antiquity, the lighthouse functioned more as an entrance marker to ports than as a warning signal for reefs and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Range Light
Leading lights (also known as range lights in the United States) are a pair of light beacons used in navigation to indicate a safe passage for vessels entering a shallow or dangerous channel; they may also be used for position fixing. At night, the lights are a form of leading line that can be used for safe navigation. The beacons consist of two lights that are separated in distance and elevation, so that when they are aligned, with one above the other, they provide a bearing. Range lights are often illuminated day and night. In some cases the two beacons are unlighted, in which case they are known as a range in the United States or a transit in the UK. The beacons may be artificial or natural. Operation Two lights are positioned near one another. One, called the front light, is lower than the one behind, which is called the rear light. At night when viewed from a ship, the two lights only become aligned vertically when a vessel is positioned on the correct bearing. During t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
