Milliradians: Ranging Example 2
Sometimes personnel is hard to spot or track, making range estimation using body dimensions difficult. Especially at long ranges, smaller objects require a more accurate reading of mrads, which is error-prone. Other larger objects, including identifiable vehicles, lend themselves to the same purpose.
A BTR-80 is 2 metres from the base of its wheels to the top of the hull, appearing as 4 mrad in our scope:
((BTR wheel to roof) * 1000) / (mrad measured) = (range in metres)
(2 m * 1000) / 4 mil = 2000 / 4
= 500 metres
