ATP-3-09-30 Observed Fires Download
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Adjustment of Fire 28 September 2017 ATP 3-09.30 5-11 Example The first round (1) impacts over the adjusting point (see figure 5-5). The observer should send a drop correction enough to place the next round short of the adjusting point. The observer sent DROP 400 (-400) after observing his first round. The next round (2) impacted short of the adjusting point. The observer has now established a range bracket, with one round over and one round short of the adjusting point, separated by 400 meters. Using the successive bracketing technique, the observer sends ADD 200 (+200). The third round (3) impacts over the adjusting point. The observer has a 200 meter bracket because round 2 impacted short of the adjusting point and the distance between the two rounds was 200 meters. Splitting the bracket, the observer sends DROP 100 (-100). The fourth round (4) impacts short. The observer has established a 100 meter bracket and now sends ADD 50, FIRE FOR EFFECT, The center of impact of the fire for effect rounds is now mathematically certain of being within 50 meters of the adjusting point. Figure 5-5. Successive bracketing technique HASTY BRACKETING 5-47. Successive bracketing mathematically ensures the observer that the fire for effect rounds will impact within 50 meters of the adjusting point. However, experience has shown the effectiveness of a fire for effect on the target decreases as the number of rounds used in adjustment increases. The adjusting rounds warn the target of an impending fire for effect, causing the target to seek cover or leave the area. 5-48. An alternative to successive bracketing is the hasty bracketing technique (see Figure 5-6 on page 5- 12). If the nature of the target dictates that effective fires are required in less time than the successive bracketing technique would take, use the hasty bracketing technique. The success of hasty bracketing adjustment depends on accurate initial target location.