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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.
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:Astronomy]]
[[category:Ships]]
[[Category:Ships]]
[[category:Navigation]]
[[Category:Navigation]]