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 Change 6 2--167 2--12 PREPARATION FOR FIRING — CONTINUED 2--12.1 Pre-Firing Emplacement — Continued d. Emplacing M1A2 Aiming Posts — Continued (m) Tapping top of vehicle and moving hand (left or right) represents movement of top of M1A2 aiming post (64). (n) Hand waved in a circular motion means for cannoneer no. 3 to return. WARNING The M1A1 collimator is radioactively illuminated. Check for presence of illumination and damage. If discovered broken, damaged, or defective, follow the procedures on pages b and c. 5 After M1A2 aiming posts (64) are emplaced, M117/M117A2 panoramic telescope (36) sight picture should be as illustrated (no displacement). Gunner then records value indicated on azimuth counter (35) and returns to sight picture on M1A1/M1A2 collimator (not shown). 64 65 66 36 37 38 39 40 NO DISPLACEMENT FAR M1A2 AIMING POST (TWO SECTIONS) NEAR M1A2 AIMING POST (ONE SECTION) 35