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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--169 2--12 PREPARATION FOR FIRING — CONTINUED 2--12.1 Pre-Firing Emplacement — Continued e. Measuring Site to Crest — Continued 6 Chief of section reports quadrant and estimated range to executive officer, “SIR, NUMBER (SO AND SO) SITE TO CREST (SO MUCH) AT (SO MUCH) RANGE.” 7 Chief of section may have gunner measure and record deflection to crest, if desired. 8 To measure deflection, gunner levels cross-level (38) and pitch level (37) of M145/M145A1 telescope mount (39), turns head of M117/M117A2 panoramic telescope (36) to M1A1/M1A2 collimator (21) or M1A2 aiming post (64) and records deflection from azimuth counter (35). 36 37 38 39 21 64 35