Figure 2-2. Trucks and Wheel Marks.
b. Wheeled vehicles will generally have a length-width ratio of 3:1. There are few
exceptions to the rule, like the Gamma goat truck, but this ratio will generally apply.
c. Tracked vehicles or tanks will generally have a length-width ratio of 2:1. On a
vertical aerial photo the length and width of a tank can be measured, the shape of the
turret can be seen, and under the right conditions, the gun tube and muzzle brake, if
present, can be detected.
3. Artillery. The term artillery is all-encompassing and includes the weapon, weapon
site, ammunition storage, command posts, and fire direction or control center.
a. Locating artillery and missile launch sites on aerial photographs is an important,
and at times, difficult task for an IA. It requires a full exploitation of the five basic factors
of identification and the use of information from other intelligence sources and agencies,
such as technical intelligence, order of battle, and interrogation personnel. Antiaircraft
artillery (AAA) is easier to locate than field artillery, as AAA is usually found in the open
(Figure 2-3).
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