TM-9-2350-311-10 M109 Operator's Manual for M109A2, M109A3, M109A4 and M109A5 Download
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TM 9-2350-311-10 2-12 PREPARATION FOR FIRING — CONTINUED 2-12.2 Boresighting — Continued g. Boresighting — Distant Aiming Point Method 1 Perform all preliminary procedures (para 2-12.2a.). 2 Select a sharply defined distant aiming point (38) which is at least 1640.4 yards (1500 m) from the weapon. Change 2 2-189