+An octant is a historical navigational instrument, a precursor to the [Sextant](/wiki/sextant), used for measuring angles. It precisely determines the [Altitude](/wiki/altitude) of celestial bodies, featuring an arc of 45 degrees, or one-eighth of a circle. This design aided mariners in calculating latitude while at sea.
+## See also
+- [Quadrant](/wiki/quadrant)
+- [Navigation](/wiki/navigation)
+- [Latitude](/wiki/latitude)
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