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Egg Rock Light (Massachusetts)
Egg Rock Light was first established in 1856 after a schooner went down with the loss of five lives. The original structure was a lantern on top of a stone dwelling built from granite cut on the island. After the wreck of the schooner ''Shark'' the characteristic was changed to fixed red because the captain of the ''Shark'' was said to have confused it with Long Island Head Light Long Island Head Light is an historic lighthouse on Long Island in Boston Harbor, Boston, Massachusetts. The current brick tower is the fourth lighthouse on the island. The light was first established in 1819, largely as a result of a study con ... in Boston Harbor. Following a fire in 1897 it was rebuilt with a square tower attached to the house. The light was operated at reduced intensity during World War I because of concerns over German submarines. It was automated in 1919 when a gas beacon replaced the oil light. The structure was sold for $160 with a clause requiring the purchaser to remove ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nahant, Massachusetts
Nahant is a town in Essex County, Massachusetts, United States. The population was 3,334 at the 2020 census, which makes it the smallest municipality by population in Essex County. With just of land area, it is the smallest municipality by area in the state. It is primarily a residential community. The town is situated on peninsula consisting of two near-islands (known as "Little Nahant" and "Big Nahant" respectively) connected to the mainland by a narrow sandy isthmus traversed by a single causeway known as "Nahant Road". Numerous tourist beaches line the shores, with the most popular being the so-called "Long Beach" and "Short Beach" along the eastern side of the causeway. History The area around Nahant was inhabited for thousands of years prior to European colonization of the Americas, but little is known of this period until European records began to document the area in the early 1600s. At that time, the seat of "Sagamore James" of the Naumkeag, known in his own tongue ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frenchman Bay
Frenchman Bay is a bay in Hancock County, Maine, named for Samuel de Champlain, the French explorer who visited the area in 1604. Frenchman Bay may have been the location of the Jesuit St. Sauveur mission, established in 1613. In a 1960 book titled, "The Story of Mount Desert Island", Samuel Eliot Morison wrote, "Frenchmans Bay was so called because it became a staging point for French warships preparing to fight the English." The bay is bounded on the east by the Schoodic Peninsula, and on the west by Mount Desert Island; parts of both are in Acadia National Park. It contains numerous islands, the largest of which is Ironbound Island. The highest elevation of the islands in the bay is found on Jordan Island. The largest town on the bay is Bar Harbor, on Mount Desert Island Mount Desert Island (MDI; french: Île des Monts Déserts) in Hancock County, Maine, is the largest island off the coast of Maine. With an area of it is the 52nd-largest island in the United States, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fresnel Lens
A Fresnel lens ( ; ; or ) is a type of composite compact lens developed by the French physicist Augustin-Jean Fresnel (1788–1827) for use in lighthouses. It has been called "the invention that saved a million ships." The design allows the construction of lenses of large aperture and short focal length without the mass and volume of material that would be required by a lens of conventional design. A Fresnel lens can be made much thinner than a comparable conventional lens, in some cases taking the form of a flat sheet. The simpler dioptric (purely refractive) form of the lens was first proposed by Count Buffon and independently reinvented by Fresnel. The ''catadioptric'' form of the lens, entirely invented by Fresnel, has outer elements that use total internal reflection as well as refraction; it can capture more oblique light from a light source and add it to the beam of a lighthouse, making the light visible from greater distances. Description The Fresnel lens redu ... [...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] |
Long Island Head Light
Long Island Head Light is an historic lighthouse on Long Island in Boston Harbor, Boston, Massachusetts. The current brick tower is the fourth lighthouse on the island. The light was first established in 1819, largely as a result of a study conducted by the Boston Marine Society, which had built the daybeacon on Nixes Mate 14 years earlier. It was a stone tower known as "Inner Harbor Light". It was the second of the four Boston lights—103 years after Boston Light, but ten years before the first daybeacon at the site of Deer Island Light, and before The Graves Light, built in 1905. In 1853, it was reported in the ''New England Farmer'', that Captain Charles A. Beck, was keeper of the Light for twenty-eight years. The stone tower fell into disrepair and was replaced by one of the earliest cast iron lighthouse structures, thirty-four feet tall (pictured below). In 1857, a fourth order Fresnel lens replaced the lamps and reflectors which had been in place. During the next tw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lighthouses Completed In 1856
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] |
Lighthouses Completed In 1898
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] |
