Figure 2-2. Typical Telescope Alignment Angular Displacements Samples

TM 9-4931-583-30&P

(5) Rotate the sighting telescope approxi-

NOTE

mately 180 degrees from original position and sight

through it. Observe the placement of the sighting reti-

Replace telescope when the change in either

cle center with respect to the target reticle center.

horizontal or vertical line of sight exceeds 2

Most telescopes will exhibit a change of approximately

mr error.

0.5 milliradian (mr) (1.72 minutes). This is equal to a

telescope alignment error of approximately 0.25 (mr) or

e. Check BAGSE alignment.

one half of the noted change. See figure 2-2 to read error

examples.

(1) Center all sliders at midpoint of their ad-

justment.

Figure 2-2. Typical Telescope Alignment Angular

Displacements Samples

2-5