MIL-T-62222 Tank, Combat, Full-Tracked: 105Mm Gun, M48A5This specification covers one type of full-tracked, armored combat vechiles, which mounts a 105MM gun as the primary weapon.

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MIL-T-62222(AT)

d. The telescope sighting equipment shall be inserted in the gun tube and the turret shall be rotated as required to align the borescope reticle with the vertical line of the gun centerline of the target board.

e. The target shall be positioned with respect to the gun trunnions as follows:

1. When the gun is leveled, in (c), the target horizontal aiming point shall be in line with the crosshair reticle as viewed through the telescopic sighting system within

1/8 inch. The target shall be raised or lowered to thus position the aiming point.

2. The gun shall be elevated to the 15 degree aiming point and the target rotated, if necessary, to superimpose the reticle on the 15 degree aiming point. When the target is thus positioned, so that elevation or depression of the gun results in the reticle traveling exactly through the zero elevation and 15 degree aiming points, the target shall be within 0.5 mil clockwise or counterclockwise of a plumb line position.

3. Laying from low to high borescope reticle shall be superimposed on the zero elevation aiming point.

f. The ballistic computer superelevation counter shall be positioned at zero by rotating the handcrank.

g. The rangefinder shall be set at 1200 meters, and the left and right side aiming points superimposed by means of the horizontal and vertical knobs.

h. Aperture stops shall be placed on the gunner's periscope, the rangefinder and the gunner's telescope, either at the objective or the exit end, as feasible.

i. The gunner's periscope (daylight), the rangefinder and the gunner's telescope reticle shall be superimposed on their zero aiming points by adjustment of boresight knobs.

j. The borescope reticle shall be superimposed on each of its aiming points laying from low to high without overtravel. The turret shall be traversed if necessary. Reticles described in (i) shall fall within their respective tolerance bands at each aiming point. A reticle line shall be considered within the tolerance bands if half or more of the reticle line is within the white area.

4.6.17.3.6.1.2 Elevation backlash. To determine conformance to 3.5.3.6.1.2, backlash tests shall be made in accordance with the following procedure: