Editing Turn (angle) (section)

== Divisions ==
{{see also|Angle#Units}}

Many angle units are defined as a division of the turn. For example, the [[Degree (angle)|degree]] is defined such that one turn is 360 degrees. 

Using [[metric prefix]]es, the turn can be divided in 100 centiturns or {{val|1000}} milliturns, with each milliturn corresponding to an [[angle]] of 0.36°, which can also be written as [[Minute and second of arc|21′&nbsp;36″]].<ref name="Hoyle_1962" /><ref name="Klein_2012" /> A [[protractor]] divided in centiturns is normally called a "[[percentage]] protractor". While percentage protractors have existed since 1922,<ref name="Croxton_1992" /> the terms centiturns, milliturns and microturns<!-- ca. 1.3" --> were introduced much later by the British astronomer [[Fred Hoyle]] in 1962.<ref name="Hoyle_1962" /><ref name="Klein_2012" /> Some measurement devices for artillery and [[satellite watching]] carry milliturn scales.<ref name="Schiffner_1965" /><ref name="Hayes_1975" />

[[Binary angular measurement|Binary fractions of a turn]] are also used. Sailors have traditionally divided a turn into 32 [[points of the compass|compass points]], which implicitly have an angular separation of {{sfrac|1|32}}&nbsp;turn. The ''binary degree'', also known as the ''[[binary radian]]'' (or ''brad''), is {{sfrac|1|256}}&nbsp;turn.<ref name="Savage_2007" /> The binary degree is used in computing so that an angle can be represented to the maximum possible precision in a single [[byte]]. Other measures of angle used in computing may be based on dividing one whole turn into {{math|2<sup>''n''</sup>}} equal parts for other values of {{mvar|n}}.<ref name="Hargreaves_2010" />