ATP-3-09-30 Observed Fires Download
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Crater and Shell Fragment Analysis and Reports 28 September 2017 ATP 3-09.30 B-7 Figure B-6. Splinter groove method Fuze Tunnel Method B-20. The four steps to determine direction by the fuze tunnel method (see figure B-7) are as follows: Place a stake in the fuze tunnel. Set up a direction-measuring instrument in line with the stake and away from fragments. Orient the instrument. Measure the direction to the weapon. Note. If the angle of fall is too great (a 90° angle), the fuze tunnel method cannot be used. Figure B-7. Fuze tunnel method