TM-9-2350-311-10

TM 9-2350-311–10

2–12 PREPARATION FOR FIRING — CONTINUED

2-12.7 Direct Fire Procedures — Continued

b. Two Man/Two Sight System — Continued

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.

The assistant gunner checks the level vial (8) level assembly mirror (9) on the M118A2/M118A3 elbow

telescope (10) to check position of level vial bubble and adjusts for cant with wormshaft assembly knob

(11) to center bubble in level vial.

For M118A2/M118A3 elbow telescope (10), the assistant gunner checks the DIRECT FIRE RANGE

PLATE (12) mounted on the breech operating cam, sights through the M118A2/M118A3 elbow

telescope, and elevates or depresses the cannon tube until the appropriate mil scale line (actual or

interpolated) passes through the center of mass of the target (13).

Assistant gunner announces “SET” when correct picture has been established and continues to

announce “SET” as long as correct picture is laid on target (13).

Gunner tracks target by traversing cannon tube and commands “FIRE” after assistant gunner calls

“SET.” Gunner and assistant gunner continue to track and fire on target until it is destroyed, or a

subsequent fire command is given by chief of section.

Chief of section gives subsequent fire commands based on observed effects, and changes range, lead,

or both as necessary.

ELEMENT

EXAMPLE

Change in lead

“RIGHT (or LEFT) 5“

Change in range

“ADD (or DROP) 100”

Gunner turns azimuth knob (5) in 5 mil (1 click) increments to set lead changes. Assistant gunner elevates or depresses

cannon tube until appropriate range line is centered on target (13) center of mass.

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