mrad equals exactly 1 cm at 100 m 1 mrad ≈ 3.44′, so mrad ≈ ′ 1′ ≈ 0.291 mrad (or 2.91 cm at 100 m, approximately 3 cm at 100 m) Definitions for maps and artillery Because of the definition of pi, in a circle with a diameter of one there are 2000 milliradians () per full turn. In other words, one real milliradian covers just under of the circumference of a circle, which is the definition used by telescopic rifle sight manufacturers in reticles for stadiametric rangefinding. For maps and artillery, three rounded definitions are used which are close to the real definition, but more easily can be divided into parts. The different map and artillery definitions are sometimes referred to as "angular mils", and are: of a circle in NATO countries. of a circle in the former Soviet Union and Finland (Finland phasing out the standard in favour of the NATO standard). of a circle in Sweden. The Swedish term for this is streck, literally "line". Reticles in some artillery sights are calibrated to the relevant artillery definition for that military, i.e. the Carl Zeiss OEM-2 artillery sight made in East Germany from 1969 to 1976 is calibrated for the eastern bloc 6000 mil circle. Various symbols have been used to represent angular mils for compass use: mil, MIL and similar abbreviations are often used by militaries in the English speaking part of the world. ‰, called "artillery per milles" (German: Artilleriepromille), a symbol used by the Swiss Army. ¯, called "artillery line" (German: artilleristische Strich), a symbol used by the German Army (not to be confused with Compass Point (German: Nautischer Strich, 32 "nautical lines" per circle) which sometimes use the same symbol. However, the DIN standard (DIN 1301 part 3) is to use ¯ for artillery lines, and " for nautical lines.) ₥, called "thousandths" (French: millièmes), a symbol used on some older French compasses. v (Finnish: piiru, Swedish: delstreck), a symbol used by the Finnish Defence Forces for the standard Warsaw Pact mil. Sometimes just marked as v if superscript is not available. Conversion table for compasses Use in artillery sights Artillery uses angular measurement in gun laying, the azimuth between the gun and its target many kilometers away and the elevation angle of the barrel. This means that artillery uses mils to graduate indirect fire azimuth sights (called dial sights or panoramic telescopes),