** Reply to note from firstname.lastname@example.org Wed, 4 Feb 1998 17:15:40 -0500
6 A unit of angular measure equal to 1/1600 of a right angle, which is approximately the angle subtended by one metre at a distance of 1000 metres.
<*> 1907 O. M. Lissak Ordnance & Gunnery xiii. 507 - The horizontal deflection scale..is graduated, in sights for field artillery, to thousandths of the range. These gradations are called mils. <*> 1920 Carter & Arnold Field Artillery Instruction vi. 219 - The angle of site scales and the deflection scales on all instruments are graduated in mils. <*> 1920 J. K. Finch Topogr. Maps 138 - The vertical lines of the sketching screen, being one inch apart and twenty inches from the eye, determine an angle of fifty mils. <*> 1941 Amer. Math. Monthly XLVIII. 188 - Most American mobile artillery units as well as many heavy railway mounts have the scales on their sights, azimuth circles, and quadrants graduated in mils. <*> 1955 C. R. Wylie Plane Trigonometry i. 21 - Show that on any circle a central angle of 1 mil intercepts an arc whose length is approximately 1/1,000 of the radius of the circle. <*> 1970 Daily Tel. 1 June 15/7 - The Services no longer measure bearings in 360 degrees but in 6,400 mills to a circle.