ATP-3-09-30 Observed Fires Download
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Appendix B B-6 ATP 3-09.30 28 September 2017 Figure B-5. Main axis method Spinter Grove Method B-19. The five steps to determine direction by the splinter groove method (see figure B-6) are as follows: Lay a stake along the ends of the splinter grooves that extend from the crater. Lay a second stake perpendicular to the first stake through the axis of the fuze tunnel. Set up a direction-measuring instrument in line with the second stake and away from fragments. Orient the instrument. Measure the direction to the weapon.