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|  MIL-T-45379D(AT)
k. The above procedure shall be followed for all solutions of 3.5.9.6.3, using the
specified conditions and controls for each table. Testing for the solutions specified in
tables XIV and XV shall be performed with the turret traversing at the rates specified
and in the direction specified. Traverse speed shall be uniform and within 1 percent
of the specified speed for each test. The traverse rate shall be maintained at least
2 seconds prior to activating the lead button. Within the subsequent 20-second
period, the periscope reticle shall be superimposed on its aiming point, and the main
gun position shall be noted on the grid board. Gun position shall be as specified.
1. The coincidence requirement between the daylight and night channels shall be
verified using the following procedure:
1. Set the computer on BORESIGHT.
2. Index HEP ammo; LRF Range: 1850 m; Wind: 20 mph from the left (Manual);
Cant: Zero (Moving mode); Altitude: Zero; Ta + 59F; and Remaining Tube
Life: 100% (new).
3. Select a distant aiming point (500 m or greater) and by use of the boresight knobs,
align the daylight and night reticle coincident up on the aiming point.
4. Set the computer to NORMAL.
5. When the computer solutions completed, lay the daylight reticle back upon the
distant aiming point and verify that the night reticle is also coincident on the
aiming point within the specified tolerance.
4.6.4.9.6.4 Ammo select. To determine conformance to 3.5.9.6.4, the ammo select test shall
be performed in conjunction with the ballistic solution test of 4.6.4.9.6.3. Upon system turn-on
verify that APDS ammo selector light is brighter than the other three ammo selector buttons on
each ammo select unit. Verify that the 105mm gun goes to the APDS 1200 m solution at system
turn-on by turning the system off for at least 5 seconds during HEP tests of table XI and then
turning the system back on without actuating any other buttons. Upon system turn-on, the
105mm gun shall automatically settle at the APDS 1200 m solution.
4.6.4.9.7 Indirect fire control.
4.6.4.9.7.1 Elevation quadrant. To determine conformance to 3.5.9.7.1, with the turret in a
level position, using a calibrated gunner's quadrant on the breech pads, the gun shall be elevated
to 355.55 mils. The reading on the elevation quadrant shall not exceed that specified. The
procedure shall be repeated with the gun at a depression of 177.78 mils.
68
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