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 295 of 775

TM 9-2350-311-10

2-12 PREPARATION FOR FIRING — CONTINUED

2-12.3

Standard Angle Method — Continued

b.

Boresighting Using the Standard Angle Method (Field Situation) — Continued

5

Rotate the M145/M145A1 telescope mount (6) cross-level mechanism knob (7) until the scribe lines on

cross-level mechanism knob and cross-level mechanism (8) aline.

6

Rotate the M145/M145A1 telescope mount (6) pitch level knob (9) until scribe lines on pitch level knob

and bracket (10) aline.

7

Repeat steps 5 and 6, rotating the pitch level knob (9) and cross-level mechanism knob (7) in a

clockwise direction until alinement is achieved.

2-197