a. Head winds. Head winds of more than 5 miles per hour tend to carry heat or even flame back toward the firer. Liquid fuel should not be fired into a head wind of more than 5 miles per hour. The range and accuracy of thickened fuels is reduced.
b. Following winds or very light winds. Best results are obtained under these conditions.
c. Cross winds. When firing at or near maximum range, cross winds deflect, breakup, and disperse the flame. They also reduce the range.
24. FIRING POSITIONS.
a. Ease of aiming. The flame thrower can be fired from any position that permits sufficient freedom to aim the weapon, subject to the conditions in b, c, and d, below. This includes standing, kneeling, and prone. In some instances, flame throwers have been fired with tank groups resting on the ground or on skids. If used in this way, the tops of the fuel tanks must be propped up to conform to b, below.
b. Angles of the tanks. When firing, the bottoms of the fuel tanks must always be substantially lower than the tops. The tops of both tanks must also each be the same distance above the horizontal and neither tank should be tilted to one side. Otherwise, only a small part of the fuel may be blown from the tanks.
c. Recoil. Stability must be sufficient to withstand the recoil from the gun. If possible, the firer should hold the gun snugly against his right side to support it and to absorb its recoil.
d. Protection. Full advantage should be taken of cover and concealment, such as shell craters and vegetation.
25. AIMING.
a. Sighting. There are no sights on the gun because of the short range from which it is fired, the variety of fuels used, and the marked effects of wind. ([Par 23])