ATP-3-09-30 Observed Fires Download
Page 96 of 204
Chapter 5 5-12 ATP 3-09.30 28 September 2017 5-49. The observer gets a bracket on the first correction much as in the successive bracketing technique. The observer uses this initial bracket as a yardstick to determine the subsequent correction. The observer sends the FDC the correction to move the rounds to the target and FIRE FOR EFFECT. Example The first round (1) impacts approximately 35 mils right and 100 meters short of the adjusting point (see figure 5-6). The observer spots it as SHORT, 35 RIGHT. With an observer-target factor of 4, the observer sends LEFT 140, ADD 200. The next round (2) impacts approximately 10 mils left and 50 meters over the adjusting point. The observer spots it as OVER, 10 LEFT. The observer looks at the round and the adjusting point and determines the need to go right 40 meters (10 X observer- target factor of 4) and drop 50. The observer will then be on the adjusting point. Therefore, sends RIGHT 40, DROP 50, FIRE FOR EFFECT. Figure 5-6. Hasty bracketing technique ONE ROUND ADJUSTMENT 5-50. Unlike the preceding two adjustment techniques, this method does not require the establishment of a bracket. The observer spots the location of the first round, calculates and transmits to the FDC the corrections necessary to move the burst of the round to the adjusting point, and fires for effect. This technique requires an experienced observer or one with accurate distance measuring equipment such as a laser rangefinder. Normally, all missions conducted by using a laser designator and rangefinder should be fire for effect or one round adjustment. DANGER CLOSE 5-51. Use the creeping fire method of adjustment during danger close missions. The observer should make range changes by creeping the rounds to the target, using corrections of 100 meters or less, rather than making large range corrections. 5-52. The observer may also use creeping fire in special situations where the potential for collateral damage requires exceptional care to limit unwanted damage to structures or vehicles close to the target.