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manipulation for both guns are the same as prescribed for linear targets. The gunners, however, apply enough search between each burst to insure the center of the beaten rone is maintained at the center base of the target.

b. One Gun. A single gunner initially lays and adjusts on the midpoint of a linear target with depth, unleas some other portion of the target presents a greater threat. The gunner traverses and searches to the near flank, then covers the entire target area <flg 139).

86* Area Targets

The leader designates an area target by indicating to the gun crew (a) the width and depth of the target. Area targets are engaged with traversing and searching fire.

(1) The target is divided at the center of ma«»; the right gun (No. 1) fires on the right half and the left gun (No. 2) fire« on the left half. The point of initial lay and adjustment for both guns is on the center of mas«.

(2) After adjusting on the center of mass, fire is distributed by determining the sire of the beaten zones and applying direction and elevation changes that cause the most effective coverage of the target area. Both guns traverse and search their respective halves to the flanks, then return to the midpoint

One Gun. A single gunner engage« an area target by laying and adjusting on the center of mas«, traversing and searching to either flank, then, reversing the direction, traversing and searching to the other flank (fig 140).

pair single


Figure 110. Bngagevunt of area target* (objective).

pair single


Figure 110. Bngagevunt of area target* (objective).


87. General a. Fire delivered over the heads of friendly troops ia overhead fire. During training, it ia used only -when troop safety has been proven. The terrain and visibility dictate when overhead fire can be delivered safely.

b. Overhead fire is used only when the following conditions have been met:

<1) The safety limit has been determined and has been identified on the ground.

(2) The gun mount is firmly seated.

(8) Friendly troops have been notified, if at all possible, that fire is to be delivered over them.

(4) The rate of fire does not exceed 40 rounds per minute.

(6) The gun barrel is not badly worn. This condition is indicated by excessive muzzle blast.

88. Determining the Safety limit a. Minimum Clearance. When delivering over head fire, the center of the cone of fire must clear the feet of friendly troops by a prescribed distance. This distance is known as minimum clearance.

b. Safety Angle. The amount of elevation change required on the gun to give minimum clearance is known aa the safety angle. The safety angle is the difference between the angle of elevation to hit the troopa and the angle of elevation for troop safety.

c. Corresponding Range. When the aaiety angle ia placed on the gun, the point where the center of the beaten zone would strike the ground determines the shortest range at which fire can be delivered over the heada of friendly troops. When the ground ia level or uniformly sloping between the gun and the target, the corresponding range for the safety angle used Is obtained by converting the troop safety angle from mils into meters. The corresponding ranges are in firing table FT .60 AA-T-2 or FT .50-H-2, for types of ammunition indicated.

AGO Mlli

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