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|  MIL-T-45379D(AT)
b. Deflection. Rotate the deflection common zeroing knobs as in a. and observe the
gunner's periscope reticle for movement in a corresponding direction. The reticle
shall be within +0.30 mil of the original setting.
4.6.4.9.6.3 Ballistics solutions. To determine conformance to 3.5.9.6.3, testing shall be
conducted after synchronization, backlash and drift requirements have been met. Tests shall be
performed in accordance with the following procedure, utilizing a grid board target and telescope
alinement equipment for determining 105mm gun position:
a. Set the computer in the boresight mode of operation. Set the LRF in the test mode
and introduce a 1200 m range by means of the BATTLE RANGE switch of the LRF.
Position the computer zeroing and common zero knobs to their zero scale position.
b. Aline the main gun on zero position on the grid board, laying from low to high
without overtravel.
c. Without moving the main gun from its zero position on the grid board, note the reticle
position of the gunner's periscope and rangefinder lines-of-sight on the distant aiming
points. (Collimators containing simulated aiming points of table XI may be utilized if
desired.)
d. Set the computer in normal operation.
e. Set the cant unit on a positioning fixture and position the cant unit to the test angles
specified within 1 minute of arc.
f. Establish the conditions specified in table XI.
g. Introduce a range specified in table XI, using the LRF for range input.
h. Realine the gunner's daylight reticle on its aiming point, laying from low to high and
from left to right.
i. The line-of-sight of the 105mm gun should now be checked on the grid board to
verify the solution given in table XI is within the tolerances specified.
j. The inspection procedure above shall be followed for each range and ammunition
specified in table XI, using the gunner's periscope (TTS) daylight reticle for gunner's
solutions and the LRF sighting system for commander's solutions.
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