In determining range, if an object fills one 10 mil unit marking on the horizontal retie

scale and is known to be 10 meters wide, the object is 1000 meters away. If the same size

object fills two unit markings (20 mils), it would be 500 meters away. When this formula is

used, the distance will be given in the same units of measurement (feet, meters, etc.) as is

used in estimating the known size of the object. The same formula can be used to determine

range with the vertical reticle scale when the height of an object is known. The use of the

vertical scale is preferred (especially on level terrain), since objects are often viewed obliquely

along the horizontal axis.

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