Observation method. If the two methods already described cannot be used, the following information can assist in determining wind velocities:
• Winds under 3 mph can barely be felt by the firer, but the presence of slight wind can be determined by drifting smoke.
• Winds of 3 to 5 mph can be felt lightly over the firer's face.
• Winds of 5 to 8 mph constantly move the leaves of trees.
• Winds of 8 to 12 mph raise dust and loose paper.
• Winds of 12 to 15 mph cause small trees to sway.
Wind is highly variable and sometimes quite different at the firing position than at the target position. Even though the wind is blowing hard at the firing line, the bullet path could be protected by trees, brush, or terrain. The wind can vary by several mph between the time a measurement is taken and when the bullet is fired. Therefore, trianing time should not be wasted trying to teach soldiers an exact way to measure wind speed. Soldiers should understand that the wind can blow the bullet off course but not to overcompensate and miss targets because of applying too much holdoff.
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