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 262 of 775

TM 9--2350--311--10

2--164

Change 6

2--12 PREPARATION FOR FIRING — CONTINUED

2--12.1

Pre-Firing Emplacement — Continued

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

3

The gunner directs emplacement of M1A1/M1A2 collimator (21) by extending his left hand above his

head through gunner’s escape hatch and having cannoneer no. 3 move as directed by following hand

movements.

(a) Moving hand (left or right) represents movement of M1A1/M1A2 collimator (21) left or right.

(b) Clenched fist means stop.

(c)

Up and down movement represents emplace.

(d) Tapping top of vehicle and moving hand (left or right) represents movement of top of M1A1/M1A2

collimator (21).

(e) Hand waved in a circular motion means for cannoneer no. 3 to return.

21

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