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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 ...
The frame of a sextant is in the shape of a sector which is approximately 1 ⁄ 6 of a circle (60°), [2] hence its name (sextāns, sextantis is the Latin word for "one sixth"). "). Both smaller and larger instruments are (or were) in use: the octant, quintant (or pentant) and the (doubly reflecting) quadrant [3] span sectors of approximately 1 ⁄ 8 of a circle (45°), 1 ⁄ 5 of a circle (72 ...
The Pioneer Instrument Company was started by Morris Maxey Titterington and Brice Herbert Goldsborough in Brooklyn, New York in 1919 using patents from the Lawrence Sperry Aircraft Corporation. [2] [3] Charles Herbert Colvin was the president. They specialized in aeronautical instruments including a bubble sextant and the Earth Inductor Compass.
Thomas moved to Liverpool to continue working as a watchmaker in 1843, and thence to London in 1854, to buy a one-way ticket to the USA, in search of new and better prospects. Seeing a chronometer in the window of John Fletcher (chronometer makers), he changed his mind about the USA, asking for work and being hired on the spot. [3]
HPI, LLC, also called HPI, is a limited liability corporation based in Houston, TX specializing in the design and development, engineering, manufacturing, testing, installation, and commissioning of control and monitoring systems for industrial turbo-machinery applications. [1]
The company opened its 10th physical trading office in Taipei in 2011, adding additional offices; Austin in 2013, Penang in 2014, Bangalore in 2015, and Cluj-Napoca, [2] Munich, and Beijing in 2017. In the current decade, Smith continues its growth adding sales offices near strategic customers in Berlin in 2021, Singapore in 2022, and London ...
After a series of storms and tornadoes hit Houston in late May, more than 900,000 people lost power for several days. Yet, one resident, Craig Wolcott, received messages from Smart Meter Texas ...
The first known mural sextant was constructed in Ray, Iran, by Abu-Mahmud al-Khujandi in 994. [1] To measure the obliquity of the ecliptic, al-Khujandī invented a device that he called al-Fakhri sextant (al-suds al Fakhrī), a reference to his patron, Buwayhid ruler, Fakhr al Dawla (976–997).