ATP-3-09-30 Observed Fires Download
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Chapter 5 5-10 ATP 3-09.30 28 September 2017 REPEAT 5-43. REPEAT is used (in the adjustment phase) if the observer wants a subsequent round or group of rounds fired with no corrections to deviation, range, or HOB (for example, TIME, REPEAT). REPEAT is also used by the observer to indicate what is wanted, fire for effect repeated with or without changes or corrections to any of the elements (for example, ADD 50, REPEAT). ADJUSTMENT TECHNIQUES 5-44. Four techniques can be used to conduct area adjustment fires: Successive bracketing is best when observers are inexperienced or when precise adjustment is required, such as precision registrations and destruction missions. It mathematically ensures fire for effect rounds will be within 50 meters of the target. Hasty bracketing is best when responsive fires are required and the observer is experienced in the adjustment of fire. One round adjustment provides the most responsive fires but generally requires either an experienced observer or an observer equipped with a laser range finder. Creeping fire is best used on danger close missions and other missions requiring the observer to make small adjustments to bring fires onto the target in order to minimize collateral damage. 5-45. Upon completion of each mission, refinement data and surveillance are required. From this surveillance, the FDC can determine the effectiveness of fires. SUCCESSIVE BRACKETING 5-46. After the first definite range spotting is determined, the observer should send a range correction to the FDC to establish a range bracket of known distance (one round over and one round short). Once the observer establishes the bracket, successively splits the bracket until confident that the rounds will impact within 50 meters of the adjusting point when requesting fires for effect. Normally, range changes of 100, 200, 400, or 800 meters are used to make splitting the bracket easier (see figure 5-5). The observer enters fire for effect when the rounds impact within 50 meters of the adjusting point.