Each member of the machinegun crew must be trained in standard methods of applying fire with the machinegun, both as a member of the crew and as a gunner.
The easiest and quickest means of delivering fire with the gun mounted on its bipod, tripod, or vehicular mount is by alining the sights of the gun on the target and properly applying fire. This technique of fire is called DIRECT LAY.
At times, techniques of fire other than direct lay are more effective- When delivering fire in the assault, overhead fire, and fire from position defilade, the gunner must use the techniques described in this chapter.
To teach crew members to employ the machinegun to the best advantage, this chapter provides guidance in the fundamentals of characteristics of fire, classes of fire, range determination, and lateral distance measurements.
Trajectory. This is the path of a bullet during flight. It is almost flat at ranges of 300 meters or less. At ranges beyond 300 meters, the trajectory is curved, and the curve becomes greater as the range increases.
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