M2/M3 BFV: FIRE CONTROL SYSTEM - OD1608 - LESSON 1/TASK 4
(5) Turn the FOCUS knob (refer to figure 25 on the previous
page) to focus the gun reticle.
When boresighting the night sight to day sight
after boresighting the 25mm gun, the status
indicator will show either AP SS or HE SS.
boresighted after boresighting the 25mm gun, the
status indicator will show 7.62 when boresighting
the night sight to day sight. The night sight to
day sight can be accurately boresighted no matter
which of these three displays is on the status
(6) Now, the elevation crosshair and the azimuth crosshair in
the gun reticle must be aligned on the aiming point of the target.
This is accomplished by lifting the NIGHT BORESIGHT cover, turning
the EL knob (figure 26) to align the elevation crosshair, and turning
the AZ knob to align the azimuth crosshair on the aiming point of the
THE NIGHT BORESIGHT KNOBS.