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...precise longitude. The problem was solved with the invention of the marine chronometer. Longitude can be calculated if the precise time of a sextant sighting is k Before the development of the lunar distance method or the marine chronometer, dead reckoning was the primary method of determining longitude available t

...d the [[calendar]], for periods longer than a day. Clocks can range from [[watch]]es, to more exotic varieties such as the [[Clock of the Long Now]]. They c ...five positions and at three temperatures. Any watch with the denomination "chronometer" is provided with a certified movement.

If he doesn't watch out, survival sickness soon turns a young man into a haggard old Faust, bur ...ssion, dreams haunted by reality. Outside, the educators look on, waiting, watch in hand, till the child joins and fits the cycle of the hours. It's they wh