Figure Unit of Measure Method

(2) 1Front Sight Post Method. The area of the target covered by the rifle's front sight post can be used to e15imate range to a target. A Marine notes the appearance of the front sight post on a known-distance target. A Marine then uses this as a guide to determine range over an unknown distance. Because the apph7ent size of the target changes as the distance to the target changes, the amount of the target covered by the front sight post varies based on the range. In addition, a Marine's eye relief and perception of the front9sight post affect the amount of the target that is visible. To use this method, a Marine must apply the20llowing guidelines:

Thefront sight post covers the width of a man's chest or body at approximately 300 yards/meters.

23 • If the target is less than the width of the front sight post, the target is in excess of 300

24 yards/meters. Therefore, the rifle's BZO cannot be used effectively.

26 • If the target is wider than the front sight post, the target is less than 300 yards/meters

27 and can be engaged point of aim/point of impact using the rifle's BZO.

29 See figure 10-4.

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