2-10. NIGHTSIDE TEST BENCH 2A3 BORESIGHT DISPLACEMENT MEASUREMENT. (CONT)
(2) Looking through eyepiece, determine the amount of boresight displacement by comparing
target position (1, figure 2-4) to the numbers on the X and Y scales around reticle (2).
A sample target position is shown in figure 2-4.
Amount of X displacement is equal to point where target passes through X
(horizontal) plane of reticle. Amount of Y displacement is equal to point where
target passes through Y (vertical) plane of reticle.
Sample target position is equal to an X displacement of 22 and a Y
displacement of 10.
(3) On VDT, type in value of X displacement.
(4) Press RETURN key.
(5) Type in value of Y displacement.
(6) Press RETURN key.
Figure 2-4. X and Y Displacement Measurement Example