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--217 2--12 PREPARATION FOR FIRING — CONTINUED 2--12.6 Laying For Direction and Quadrant During Indirect Fire Mission — Continued a. Laying for Direction Using M1A1/M1A2 Collimator — Continued 6 After assistant gunner lays the cannon for quadrant and announces to “SET,” gunner verifies that announced deflection appears on reset counter (3). M145/M145A1 telescope mount (7) pitch level (5) and cross-level (6) bubbles are centered, and a proper sight picture is on M1A1/M1A2 collimator (10). Gunner then announces “READY.” 10 3 7 5 6