The Determination Of This Angle
Rigid metal frame Construction with Three Legs for Horizontal Resting position of Sextant,
arc Scale made of German Silver or equivalent having graduations from -5 Degrees to 120 Degrees with smallest division of one degree, should have both Galilean and Astronomical Telescopes, Index and Horizon Mirrors with necessary high quality Filters.
The primary use of a sextant is to determine the angle between an astronomical object and the horizon for the purposes of celestial navigation. The determination of this angle, the altitude, is
known as sighting (or shooting) the object, or taking a sight.
an instrument with a graduated arc of 60° and a sighting mechanism, used for measuring the angular distances between objects and especially for taking altitudes in navigation and surveying.
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