How to Undertake Surveillance and Reconnaissance : From a Civilian and Military Perspective by Henry Prunckun

Author:Henry Prunckun [Prunckun, Henry]
Language: eng
Format: epub
Tags: HISTORY / Reference
ISBN: 9781473859371
Publisher: Pen and Sword
Published: 2015-05-29T23:00:00+00:00

In contrast, the target may appear further away than it is if the:

■ Light is poor or shining into the scout’s eyes.

■ Target is smaller than the objects around it (e.g. larger rock features, large rivers, large buildings, etc.).

■ Target is located across a basin, canyon or gorge.

■ Target is shown against a dark background or backdrop.

■ Scout is lying on the ground.

Unit of Measure Method

The first step is to use a distance that the scout is familiar with, say a football field. Using this as a gauge, estimate how many of these units could fit in between the scout and the target. The limitations with this method are that it relies on the scout being able to view the ground between him or her and the target, and the effectiveness of this method diminishes after about 400 meters (i.e. 437 yards).

Halving Method

Working backwards from the target, determine the approximate halfway point. Then working from that point back to the scout’s location, halve it again. At this point the scout should be able to determine the distance to this quarter-way point. It is then a matter of multiplying this distance by four to arrive at the estimate to the target.

Combined Method

To double-check either of these methods, a scout can ask two of his or her unit members to undertake the distance judging exercise, one using the unit measure method and the other using the halving method. The results should be within a reasonable approximation of each other. If they differ, the range can be used. For example, between 350 and 400 meters or whatever are the two distances.

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