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Omega Marine Chronometer
The Omega Marine Chronometer was the first quartz wristwatch ever to be awarded certified status as a marine chronometer. The watch was made by Omega SA and developed by John Othenin-Girard and is one of the most accurate non thermo-compensated production watches ever made, keeping time to within 1 second per month Introduction The watch was introduced to the market in 1974 under calibre 1511, having an unrivalled accuracy of 12 seconds per year thanks to the revolutionary 2.4 MHz quartz circuit. in 1976 the calibre 1516 Marine Chronometer was introduced with smaller case dimensions and altered movement, although performance remained the same, sales began in 1974 and the watch remained in Omega line up until 1978. Famous owners of Omega Marine Chronometers have included Jaques Cousteau and Eric Tabarly. Early development The first prototypes of the ‘1500 family’ quartz watch (which later developed into the Marine Chronometer) were presented at the Basel Fair in 1970 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Chronometer
A marine chronometer is a precision timepiece that is carried on a ship and employed in the determination of the ship's position by celestial navigation. It is used to determine longitude by comparing Greenwich Mean Time (GMT), or in the modern world its successor Coordinated Universal Time (UTC), and the time at the current location found from observations of celestial bodies. When first developed in the 18th century, it was a major technical achievement, as accurate knowledge of the time over a long sea voyage was vital for effective navigation, lacking electronic or communications aids. The first true chronometer was the life work of one man, John Harrison, spanning 31 years of persistent experimentation and testing that revolutionized naval (and later aerial) navigation and enabling the Age of Discovery and Colonialism to accelerate. The term ''chronometer'' was coined from the Greek words '' χρόνος (chronos)'' (meaning time) and ''meter'' (meaning measure) in 1713 by ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OMC Calibre 1516
OMC may refer to: Business * Oil marketing company Organizations * OMC Shipping pte. ltd., a large bulk carrier, container and PCTC shipping company based in Singapore * Omnicom Group (stock symbol) * Outboard Marine Corporation * Olifant Manufacturing Company of South Africa, now known as Land Systems OMC * Acronym for the World Trade Organization in French, Portuguese and Spanish * Osaka Medical College * Oxfordshire Museums Council * The Oxford Mindfulness Centre (within the Department of Psychiatry, University of Oxford) Places * Ormoc Airport in Ormoc City, Leyte, the Philippines Musical groups * OMC (band), a New Zealand music group formerly known as Otara Millionaires Club * Old Man's Child, a Norwegian Black metal band Technology * Operations and Maintenance Centre, a controlling equipment for telecom networks * Orange Monte Carlo, Android phone Other * Octyl methoxycinnamate, the active ingredient in sunscreens * Open Method of Coordination, a means of governan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Satellite Navigation
A satellite navigation or satnav system is a system that uses satellites to provide autonomous geo-spatial positioning. It allows satellite navigation devices to determine their location (longitude, latitude, and altitude/elevation) to high precision (within a few centimetres to metres) using time signals transmitted along a line of sight by radio from satellites. The system can be used for providing position, navigation or for tracking the position of something fitted with a receiver (satellite tracking). The signals also allow the electronic receiver to calculate the current local time to a high precision, which allows time synchronisation. These uses are collectively known as Positioning, Navigation and Timing (PNT). One set of critical vulnerabilities in satellite communications are the signals that govern positioning, navigation and timing (PNT). Failure to properly secure these transmissions could not only disrupt satellite networks but wreak havoc on a host of dependent s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OMC Ships Clock
OMC may refer to: Business * Oil marketing company Organizations * OMC Shipping pte. ltd., a large bulk carrier, container and PCTC shipping company based in Singapore * Omnicom Group (stock symbol) * Outboard Marine Corporation * Olifant Manufacturing Company of South Africa, now known as Land Systems OMC * Acronym for the World Trade Organization in French, Portuguese and Spanish * Osaka Medical College * Oxfordshire Museums Council * The Oxford Mindfulness Centre (within the Department of Psychiatry, University of Oxford) Places * Ormoc Airport in Ormoc City, Leyte, the Philippines Musical groups * OMC (band), a New Zealand music group formerly known as Otara Millionaires Club * Old Man's Child, a Norwegian Black metal band Technology * Operations and Maintenance Centre, a controlling equipment for telecom networks * Orange Monte Carlo, Android phone Other * Octyl methoxycinnamate, the active ingredient in sunscreens * Open Method of Coordination, a means of governan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Longitude By Chronometer
Longitude by chronometer is a method, in navigation, of determining longitude using a marine chronometer, which was developed by John Harrison during the first half of the eighteenth century. It is an astronomical method of calculating the longitude at which a position line, drawn from a sight by sextant of any celestial body, crosses the observer's assumed latitude. In order to calculate the position line, the time of the sight must be known so that the celestial position i.e. the Greenwich Hour Angle (Celestial Longitude - measured in a westerly direction from Greenwich) and Declination (Celestial Latitude - measured north or south of the equational or celestial equator), of the observed celestial body is known. All that can be derived from a single sight is a single position line, which can be achieved at any time during daylight when both the sea horizon and the sun are visible. To achieve a fix, more than one celestial body and the sea horizon must be visible. This is usuall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Naval Hydrographic And Oceanographic Service
The Naval Hydrographic and Oceanographic Service (french: Service hydrographique et océanographique de la Marine or SHOM) is a French public establishment of an administrative nature (french: établissement public à caractère administratif) administered by the Ministry of Defence. It is the successor to the Dépôt des cartes et plans de la Marine, founded in 1720 which became the Naval Hydrographic Service in 1886 and the Naval and Oceanographic Service in 1971. Its present form was set up by decree number 2007-800 on 11 May 2007. Its board is presided over by the Chief of Staff of the French Navy (french: Chef d'État-Major de la Marine) and the body is directed by a director-general. Aims This public body has several aims, including the provision of : * a public service in hydrography and maritime cartography, including the collection, elaboration, confirmation and spread of nautical information useful to civil or naval navigators and to all who sail for professional or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omega 1511 And 1516 Movement
Omega (; capital: Ω, lowercase: ω; Ancient Greek ὦ, later ὦ μέγα, Modern Greek ωμέγα) is the twenty-fourth and final letter in the Greek alphabet. In the Greek numeric system/isopsephy (gematria), it has a value of 800. The word literally means "great O" (''ō mega'', mega meaning "great"), as opposed to omicron, which means "little O" (''o mikron'', micron meaning "little"). In phonetic terms, the Ancient Greek Ω represented a long open-mid back rounded vowel , comparable to the "aw" of the English word ''raw'' in dialects without the cot–caught merger, in contrast to omicron which represented the close-mid back rounded vowel , and the digraph ''ου'' which represented the long close-mid back rounded vowel . In Modern Greek, both omega and omicron represent the mid back rounded vowel or . The letter omega is transliterated into a Latin-script alphabet as ''ō'' or simply ''o''. As the final letter in the Greek alphabet, omega is often used t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OMC Comparison
OMC may refer to: Business * Oil marketing company Organizations * OMC Shipping pte. ltd., a large bulk carrier, container and PCTC shipping company based in Singapore * Omnicom Group (stock symbol) * Outboard Marine Corporation * Olifant Manufacturing Company of South Africa, now known as Land Systems OMC * Acronym for the World Trade Organization in French, Portuguese and Spanish * Osaka Medical College * Oxfordshire Museums Council * The Oxford Mindfulness Centre (within the Department of Psychiatry, University of Oxford) Places * Ormoc Airport in Ormoc City, Leyte, the Philippines Musical groups * OMC (band), a New Zealand music group formerly known as Otara Millionaires Club * Old Man's Child, a Norwegian Black metal band Technology * Operations and Maintenance Centre, a controlling equipment for telecom networks * Orange Monte Carlo, Android phone Other * Octyl methoxycinnamate, the active ingredient in sunscreens * Open Method of Coordination, a means of governan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omega Flightmaster
The Omega Flightmaster is a vintage hand -ound chronograph A chronograph is a specific type of watch that is used as a stopwatch combined with a display watch. A basic chronograph has an independent sweep second hand and a minute sub-dial; it can be started, stopped, and returned to zero by successive ... made by Omega SA between 1969 and 1972. The Flightmaster was designed by Frédéric Robert, the creator behind the Geneva diving watchmaker Aquastar (watch brand), Aquastar. There were two versions of the Flightmaster. An earlier model that had a 24-hour time register at 9 o'clock instead of the running seconds register. The movements used are the 17 jewel Omega manual wind calibre 911; the 24-hour model used the Omega manual wind calibre 910. This wristwatch is larger than most of its era and measures 43mm wide by 52mm long. The watch was created for pilots and was marketed by Omega as such. There is evidence that Flightmasters were used by Soviet Cosmonauts. References [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aventurine
Aventurine is a form of quartz, characterised by its translucency and the presence of platy mineral inclusions that give it a shimmering or glistening effect termed ''aventurescence''. Background The most common color of aventurine is green, but it can also be orange, brown, yellow, blue, or grey. Chrome-bearing fuchsite (a variety of muscovite mica) is the classic inclusion and gives a silvery green or blue sheen. Oranges and browns are attributed to hematite or goethite. Because aventurine is a rock, its physical properties vary: its specific gravity may lie between 2.64-2.69 and its hardness is somewhat lower than single-crystal quartz at around 6.5. Aventurine feldspar or sunstone can be confused with orange and red aventurine quartzite, although the former is generally of a higher transparency. Aventurine is often banded and an overabundance of fuchsite may render it opaque, in which case it may be mistaken for malachite at first glance. The name ''aventurine'' derives fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Omega Bullhead
The Omega Bullhead was introduced in 1969 as part of the Chronostop range, it was marketed as drivers / rally watch and was nicknamed the "Bullhead" because of the configuration of the winding crown being located at 12 o'clock with the chronograph pushers on either side. Introduction The calibre 930 was introduced in 1969 in both Omega Seamaster Bullhead and De-Ville models. The watch was produced by Omega SA watches as a twin register chronograph with date in stainless steel models and gold plated models. The movement was manual wind and was an evolution of the calibre 27 CHRO used as part of the wider Omega range but with date function The Omega Bullhead was marketed as a drivers / Rally watch as part of the chronostop range of watches and like others in the range was quirky in both design and colour configuration of the dial. Production watches The movement was an evolution of Omega's 27 CHRO range and formed part of the wider 861 family of watches, developed from the 32 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
