Figure 4-3. Adjusting the Line of Sight

TM 5-6675-329-13 & P

(2)

The instrument is still at D. The line of sight is adjusted by shifting the reticle plate slightly. This is

done with the capstan-headed adjusting screw (2) which can be seen after turning the black, protective cover (1) to the

left. Using the adjusting pin from the instrument container, carefully turn the adjusting screw (2) until the horizontal hair

gives the computed, correct reading a4 on the staff B. The last turn of the adjustment screw (2) should be clockwise, i.e.

to the left. Close the protective cover (1) by turning it to the right to its stop. Finally repeat the test (4-10 b. (1)) to verify

the adjustment.

Figure 4-3. Adjusting the Line of Sight

4-10