TM-9-2350-311-10

HOWITZER, MEDIUM, SELF-PROPELLED, 155MM; M109A2, M109A3, M109A4 AND M109A5

TECHNICAL MANUAL; OPERATOR’S MANUAL

NOVEMBER 1994

TM-9-2350-311-10 - Page 263 of 775

TM 9--2350--311--10

Change 6

2--165

2--12 PREPARATION FOR FIRING — CONTINUED

2--12.1

Pre-Firing Emplacement — Continued

c. Emplacing Infinity Aiming Reference M1A1/M1A2 Collimator — Continued

4

Sighting through M117/M117A2 panoramic telescope (36), gunner commands cannoneer no. 3 to rotate

M1A1/M1A2 collimator (21) azimuth adjustment knob (56) until M117/M117A2 panoramic telescope

crosshairs (45 and 47) are centered with M1A1/M1A2 collimator reticle crosshairs (61), as shown.

Gunner then motions cannoneer no. 3 in.

5

Gunner then records value appearing on his azimuth counter (35) and closes access door (34).

6

Gunner rotates reset knob (62) on M117/M117A2 panoramic telescope (36) until 3200 appears on reset

counter (63).

36

45

47

63

62

61

34

35