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<p>[QUOTE=&quot;springfld.arsenal, post: 158257, member: 54&quot;]As a Navy watch, it was most likely used in taking celestial sightings.&nbsp; The navigator&#039;s assistant starts the stopwatch when the chronometer in the chart house hits an even minute.&nbsp; Then he&#039;s able to write down the exact second the navigator measures the altitude of a given celestial body.&nbsp; The altitude and time plus detailed tables of numbers produce a line of position for each body.&nbsp; Many sightings are taken around the horizon and where they all cross when plotted on a chart is the ship&#039;s position.&nbsp; Beenthere, donethat.[/QUOTE]</p><p><br /></p>

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