sextant Unit Converter

Definition of sextant unit

A sextant is a traditional angular unit equal to one-sixth of a degree, or 10 arcminutes. It represents a subdivision of the degree based on six equal parts and should not be confused with the navigational instrument used to measure angles.

History of sextant unit

The term sextant comes from the Latin sextans, meaning “a sixth,” reflecting division of a degree into six parts. Related angular subdivisions appeared in older mathematical and astronomical traditions, although this unit was never as widely standardized as degrees, minutes, and seconds. The word became especially familiar through the reflecting sextant, developed in the eighteenth century for celestial navigation. Navigators measured the altitude of the Sun or stars with that instrument, while the angular concept remained a descriptive or specialized unit. Modern technical practice expresses this angle as 10 arcminutes.

Applications of sextant unit

Today, sextant as an angular unit is mainly encountered in historical, astronomical, navigational, or unit-conversion references. It can describe an angle of 10 arcminutes, such as a measured altitude or a small separation between celestial objects. In practical navigation, however, instruments and charts normally report readings in degrees, arcminutes, and arcseconds, so sextant is uncommon in contemporary professional usage.

Complete list of sextant unit conversion