http://www.seaborne-fartygsmagasinet.com/instruments.html WebAntique Marine Chronometers Two Day Marine Chronometer by Whyte, Thompson & Co. Glasgow & South Shields 19th Century Brass Theodolite by S.P.Cohen, Glasgow A Fine …
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WebVINTAGE HAMILTON MODEL 21 SHIPS CHRONOMETER DECK CLOCK BRASS GIMBALL PARTS. Opens in a new window or tab. C $13.53. Top Rated Seller Top Rated Seller. 1 bid · Time left 4d 21h left (Sun, 05:59 p.m.) midwestestate (59,215) 100% +C $28.44 shipping. from United States WebA Waltham ship's watch boxed chronometer, with gimbals, circa 1937, eight day movement, 7 cm dial diam, box. Height 15 cm.… Height 15 cm.… A cased Thomas Mercer chronometer, circa 1920, set in a walnut case with a glazed lid , brass bowl and gimbal suspension.… port marjoryburgh
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WebEXTREMELY RARE American ship's chronometer from an identified sailing ship! This particularly handsome navigational timepiece was made by the premier American makers "T. S. & J. D. NEGUS, New York No. 1439" as elaborately engraved on … 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), and the time at the current location found from observations of celestial … See more To determine a position on the Earth's surface, it is necessary and sufficient to know the latitude, longitude, and altitude. Altitude considerations can naturally be ignored for vessels operating at sea level. Until the mid-1750s, … See more The crucial problem was to find a resonator that remained unaffected by the changing conditions met by a ship at sea. The balance wheel, harnessed to a spring, solved most of the problems associated with the ship's motion. Unfortunately, the elasticity of most … See more Since the 1990s boats and ships can use several Global Navigation Satellite Systems (GNSS) to navigate all the world's lakes, seas and oceans. Maritime GNSS units include functions useful on water, such as "man overboard" (MOB) functions that allow instantly marking … See more • National Maritime Museum, Greenwich • Henri MOTEL n°258 Chronomètre de Marine 40 heures (in French) See more In strictly horological terms, "rating" a chronometer means that prior to the instrument entering service, the average rate of gaining or losing per day is observed and recorded on a rating certificate which accompanies the instrument. This … See more • Ulysse Nardin (watch) • Celestial navigation • Sextant • Clockmaker • Thomas Earnshaw, inventor of the standard chronometer escapement See more Web£2500 $3129 €2852.75 Thomas Mercer Two Day Marine Chronometer 1954 Tyne Antiques £13750 $17209.5 €15690.13 8-day Mantel Chronometer By Parkinson & Frodsham … port marilyne