ATP-3-09-30 Observed Fires Download
Page 181 of 204
28 September 2017 ATP 3-09.30 B-1 Appendix B Crater and Shell Fragment Analysis and Reports This appendix tells you how to properly conduct a crater and shell fragment analysis and reporting. WARNING PRIOR TO INVERIGATING A CRATER, EXPLOSIVE ORDNANCE DISPOSAL PERSONNEL HAVE TO ADVISE PERSONNAL THAT THE AREA IS CLEAR AOF EXPLOSIVE HAZARDS. FAILURE TO DO SO MAY RESULT IN INJURY OR DEATH Note. Under any circumstances, if UXOs or residual explosive hazards are suspected, do not attempt to conduct crater analysis. Notify EOD personnel immediately. CRATER ANALYSIS TEAM B-1. In crater analysis, difference in angle of fall, projectile burst patterns, directions of flight, and fuze settings will help distinguish between enemy batteries firing on a given area. B-2. To adequately support their maneuver unit, fire support personnel must know how to analyze and report crater analysis. Each unit (including units normally located in rear areas) should select and train at least one team of two or three members. EQUIPMENT B-3. Three elements (direction, dimensions, and curvature) must be measured for crater analysis. The equipment used by crater analysis teams should consist of the following items: Declination aiming circle (or M2 compass), stakes, and communication wire or strong cord used to obtain the direction from the crater to the weapon that fired the projectile. A curvature template (see figure B-1 on page B-2) to measure the curvature of the fragment to determine the caliber of the shell. The template can be constructed of heavy cardboard, acetate, wood, or other appropriate material. It may be necessary to construct several templates with different caliber curves to cover all enemy calibers used.