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 290 of 775

TM 9-2350-311-10

2–12

PREPARATION FOR FIRING — CONTINUED

2-12.2

Boresighting — Continued

g.

Boresighting — Distant Aiming Point Method — Continued

8

9

10

NOTE

Make sure you have done steps 1 through 3.

In order to prevent damage to M118A2/M118A3 elbow telescope, stow against upper stop when

not in use. Do not use as a handhold under any circumstances.

Turn wormshaft assembly knob (39) to center bubble in level vial (40). Rotate deflection knob (22) and

elevation knob (23) to lay M118A2/M118A3 elbow telescope (32) reticle on the upper left-hand corner of

distant aiming point (38).

Without moving deflection knob (22) and elevation knob (23), set M146 telescope mount (24) elevation

dial (25) and deflection scale dial (26) to elevation 4, azimuth 4. Check to be sure sight picture did not

move when elevation dial and deflection scale dial were set to 4.

Weapon is now boresighted.

M118A2/M118A3 ELBOW

TELESCOPE RETICLE

2-192