FM/BG-527.V1.02 - Milliradians: Ranging example 2
Sometimes people are hard to spot or track, making range estimation using body dimensions difficult. 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 ground to the top of the hull, appearing as 4 mrad in our scope:
- ((Ground to top of BTR hull) * 1000) / (mrad measured) = (range in metres)
- (2 m * 1000) / 4 mrad = 2000 / 4
- = 500 metres
Above: A BTR-80, known to be 2 metres high when measured from the ground to the top of its hull
