ATP-3-09-30 Observed Fires Download
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Appendix B B-2 ATP 3-09.30 28 September 2017 Figure B-1. Curvature template VALUE OF ANALYSIS B-4. By analyzing shell craters, it is possible to do the following: Verify as confirmed locations, suspected locations that have been obtained by others means. Confirm the presence of enemy artillery and obtain an approximate direction to it. Approximate the calibers and types of suspected enemy weapons. CRATER ANALYSIS B-5. The first step in crater analysis is to locate a usable crater for determining the direction to the hostile weapon. The crater should be clearly defined on the ground and should be reasonably fresh. B-6. Since the crater is the beginning point for plotting the direction to the enemy weapon, the grid coordinates of the crater should be determined as an eight-digit grid, or as accurately as time and method used will allow. B-7. The direction to the firing weapon must be determined by one of the methods described in the following paragraphs. LOW-ANGLE MTSO CRATER (ARTILLERY) B-8. There are two methods of obtaining a direction to a hostile weapon from this type of crater. The best results are obtained by determining a mean, or average, of several directions obtained by using both methods. The detonation and forward momentum of a fired munition creates a visible pattern at the site of impact similar to an arrow which points to the rear (towards the weapon from which the round was fired). The fuze continues along the line of flight, creating a fuze furrow. Fuze Furrow and Center-of-Crater Method B-9. In this method, stakes are placed in the center of crater and in the fuze furrow. Then the direction is measured to the hostile weapon. (See figure B-2) A variation of this method is to place a stake where the shell