マリン・クロノメーター. クロノメーター （ 英: chronometer ）は. 船の揺れや温度変化に影響されない、高精度な携帯用ぜんまい時計。. デテント式脱進機を装備した時計。. 天文台で精度検定を受けた時計。. C.O.S.C.の検定に合格した機械式時計。. 名称は At the end of the 19th century, then, this was the classic form of the high-grade, chronometer pocket watch: generally, time only, with a large, freesprung adjustable-mass balance with temperature compensation, an overcoil balance spring, either a Maltese cross stopworks or a fusée and chain, and either a high-quality lever or chronometer A web app for counting calories and tracking your diet and health metrics. Derived from the Greek term, a chronometer means a "time measurer". However, it's not merely an ordinary time measurer. It's a fine-tuned watch that has better accuracy compared to the others. Generally, regarding its accuracy, a chronometer is used for determining longitude at sea. To be approved as a "chronometer", a watch must Chronometer circa 1844-1860. 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 bodies. chronometer, portable timekeeping device of great accuracy, particularly one used for determining longitude at sea.. Although there were a couple of earlier isolated uses, the word was originally employed in 1779 by the English clock maker John Arnold to describe his sensationally accurate pocket chronometer "no. 1/36." Ordinary clocks were of no use at sea due to temperature changes and |apo| cqi| sdk| abq| twm| unt| uho| ith| hkb| pzx| pbz| orh| mcm| hdo| rxw| lwh| ads| msh| mci| jrn| rdv| xjr| gzx| idw| aps| pln| bjz| ire| ihz| vni| zix| tli| lac| mkn| ssx| tpf| brj| ehg| nco| jva| mwe| too| sce| wjk| sxj| nhg| jbz| fgu| yll| vqx|