A wind gage can be used for precise measurement of wind velocity. When a gage is not available, velocity is estimated by one of the following methods:
Flag method. If the firer can observe a flag or any clothlike material hanging from a pole, he should be able to estimate the angle formed at the juncture of the flag and pole. As shown in Figure F-10, dividing this angle by the constant number 4 equals the wind velocity in mph.
Pointing method. If a flag is not visible, a piece of paper or other light material can be dropped from the shoulder. By pointing directly at the spot where it lands, the angle can be estimated. As shown in Figure F-ll, this angle is also divided by the
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