Figure Front Sight Post Method

31 (3) Visible Detail Method. The amount of detail seen at various ranges can provide a

32 Marine with an estimate of the target's distance. To use this method, a Marine must be

33 familiar with the size and various details of personnel and equipment at known distances.

34 Visibility limits (such as weather, smoke, or darkness) the effectiveness of this method. A

35 Marine should observe a man while he is standing, kneeling, and in the prone position at

36 known ranges of 100 to 500 yards/meters. He should note the man's size, characteristics/size

37 of his uniform and equipment, and any other pertinent details. The Marine then uses this as a

38 guide to determine range over an unknown distance. A Marine also should study the

1 appearance of other familiar objects such as rifles and vehicles. To use this method, a Marine

2 applies the following general guidelines:

3 • At 100 yards/meters, the target can be clearly observed in detail and facial features can

4 be distinguished

6 • At 200 yards/meters, the target can be clearly observed. There is a loss of facial detail.

7 The color of the skin and equipment are still identifiable.

9 • At 300 yards/meters, the target has a clear body outline, face color usually remains

10 accurate, but remaining details are blurred.

12 • At 400 yards/meters, the body outline is clear but remaining detail is blurred.

14 • At 500 yards/meters, the body shape begins to taper at the ends. The head becomes

15 indistinct from the shoulders.

17 • At 600 yards/meters, the body is wedge-shaped with no head.

18 (4) Bracketing Method. This method of range estimation estimates the shortest possible

19 distance and the greatest possible distance to the target. For example, a Marine estimates that

20 a target may be as close as 300 yards/meters but it could be as far away as 500 yards/meters.

21 The estimated distances are averaged to determine the estimated range to the target. For

22 example, the average of 300 yards/meters and 500 yards/meters is 400 yards/meters.

23 (5) Halving Method. This method of range estimation judges ranges out to 800

24 yards/meters. To use this method, a Marine estimates the distance halfway between him and

25 the target, then doubles that distance to get the total distance to the target. A Marine must

26 take care when judging the distance to the halfway point, any error made in judging the

27 halfway distance is doubled when estimating the total distance.

28 (6) Combination Method. The methods previously discussed require optimal conditions

29 with regard to the target, terrain, and visibility in order to obtain an accurate range estimation.

30 A Marine should estimate the range using two methods and then compare the estimates, or

31 two Marines can compare their estimates. The average of the two estimates should be close

32 to the actual range to the target.

33 b. Factors Affecting Range Estimation. There are specific factors that will affect the accuracy

34 of estimation. A Marine must be aware of these factors and attempt to compensate for their

35 effects.

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