Difference between revisions of "Sextant"
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| − | + | A '''Sextant''' is an [[instrument]] used for [[navigation|navigating]] at [[sea]] by sighting on either the [[sun]] or a [[star]] and determining its [[elevation]] above the [[horizon]]. It is excellent for determining [[latitude]], but accurate [[longitude]] measurements require good timepieces as well, capable of working on [[ship]]s which pitch and roll on the waves. | |
| + | [[category:astronomy]] | ||
| + | [[category:Ships]] | ||
| + | [[category:Navigation]] | ||
Revision as of 16:35, January 24, 2010
A Sextant is an instrument used for navigating at sea by sighting on either the sun or a star and determining its elevation above the horizon. It is excellent for determining latitude, but accurate longitude measurements require good timepieces as well, capable of working on ships which pitch and roll on the waves.