Page:Tactics (Balck 1915).djvu/291

 range, the diminishing visibility of the target, and prolonged fire. On the other hand, a single jamming can make a machine gun valueless, at least for the time being. For this reason, the Germans employ machine guns only in platoons, as a rule, and the Swiss let both guns of a platoon fire simultaneously only in exceptional cases. Theoretically, the maximum rate of fire of 600 rounds per minute will rarely be attained; and 200-300 rounds per minute will usually suffice against prone targets. In Germany volley and continuous fire are employed; fire by a single piece is used only to ward off patrols when the machine guns do not want to betray their position.

A volley consists of about 25 rounds and is followed by a pause for observing the effect of the fire. It is employed in adjusting the fire upon difficult targets in rolling country. Fire for effect consists, as a general rule, of "continuous fire," and is interrupted only when the tactical situation requires it. The water in the jacket should be renewed and oiling attended to during the pauses in the fire, whether these grow out of the tactical situation, or are made necessary by technical considerations.

The fire is either directed upon a point (concentrated fire), the elevation and direction of the piece being fixed, or it is distributed over the entire target or over a designated part of the same (sweeping, and progressive fire). *