ATP-3-09-30 Observed Fires Download
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Adjustment of Fire 28 September 2017 ATP 3-09.30 5-29 Example Quick and time registration (see figure 5-15 on page 5-24). Refinement data for the impact portion was determined by using rounds 5, 6, 7, and 8. Sum of deviation spottings is 6R + 0 + 4R + 2R = 12R. Average deviation is 12R ÷ 4 = 3R. Observer-target factor is 3. Mean point of impact is 3 X 3R = 9 meters R ≈ 10 meters R. The registration point is nearer the pair of rounds at the opposite end of the bracket form the last round fired. Correction is LEFT 10, DROP 20, RECORD AS REGISTRATION POINT, TIME REPEAT, OVER. Refinement data for the time portion was determined by using rounds 9, 10, 11, and 12. The sum of HOB spottings is: AIR 5 + AIR 6 + AIR 3 + AIR 5 = AIR 19. Average HOB is AIR 19 ÷ 4 = AIR 4.75 ≈ AIR 5. Observer-target factor is 3. Mean HOB is 3 X AIR 5 = AIR 15 meters. Correction is UP 5, RECORD AS TIME REGISTRATION POINT, END OF MISSION, OVER.