M2/M3 BFV: FIRE CONTROL SYSTEM - OD1608 - LESSON 1/TASK 4
THE SENSOR SELECT SWITCH IN THE CLEAR POSITION.
(7) Once the crosshairs of the gun reticle are aligned on the
aiming point of the target, move the SENSOR SELECT switch (figure 27)
to CLEAR or NEUTRAL.
(8) Check the alignment of the gun reticle on the aiming point
of the target. If the elevation crosshair and the azimuth crosshair
in the gun reticle align on the aiming point, the night sight is
correctly boresighted to the day sight. If the elevation and azimuth
crosshairs in the gun reticle do not align on the aiming point,
troubleshooting must be performed to isolate and correct the problem.
Troubleshooting procedures can be found, when needed, in TM 9-2350-
252-20-2-1, chapter 3.
(9) When the night sight is boresighted to the day sight, close
the NIGHT BORESIGHT cover.
b. The Buddy Boresight Method.
The second method that can be
used to boresight the night sight to day sight on the Bradley
fighting vehicle is the buddy boresight method. This method requires
two vehicles and is used when the visibility is poor, but not less
than 656 feet (200 meters).
Never look at the sun through the ISU; doing so
could cause blindness.