PHASE THREE: The same target man makes quick, jerky movements constantly for 30 seconds.

PHASE FOUR: The same target man fires one or two blank rounds toward the observation line (safety permitting). The command to begin a stationary target trial is TRIAL ONE, PHASE ONE, OBSERVE.

Table B-1. Factors affecting the appearance of objects.

Factors in determining range by eye

Objects appear nearer than they are—

Objects appear more distant than they are-

The target - its clearness of out line and details.

When most of the target is visible and offers a clear outline

When only a small part of the target may be seen or is small in relation to its surroundings.

Nature of the terrain or position of the observer.

When looking across a depression, most of which is hidden from view.

When looking across a depression, all of which is visible.

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