ATP-3-09-30 Observed Fires Download
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Adjustment of Fire 28 September 2017 ATP 3-09.30 5-3 Figure 5-2. Range spotting DEVIATION SPOTTING 5-6. A deviation spotting is the angular measurement from the adjusting point to the burst as seen from the observer's position. During a fire mission, the observer measures the deviation in mils, with binoculars (or other angle measuring instrument). Visually interpolate deviation spottings to the nearest 5 mils for area fires and one mil for precision fires. The following are deviation spottings: Line—A spotting of “LINE” is a round that impacts on line with the adjusting point as seen by the observer (on the observer-target line). Left—A spotting of “LEFT” is a round that impacts left of the adjusting point in relation to the observer-target line. Right—A spotting of “RIGHT” is a round that impacts right of the adjusting point in relation to the observer-target line. Example An observer spots a round to the right of the observer-target line. The measured angular deviation is 40 mils. The deviation spotting is 40 RIGHT. 5-7. Take deviation spottings from the center of a single burst or, in the case of platoon or battery fire, from the center of the group of bursts. Make deviation spottings as accurately as possible to help in obtaining definite range spottings.