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|  MIL-T-45379D(AT)
TABLE V. Gun laying on moving target and tracking accuracy.
Target
Length
size
Target
Traverse
Percent
of
Target
Target
centi-
size
rate
of
course
velocity
range
meters
mils
mils/sec
Established
time on
meters
mph
meters
(Square)
(Square)
(reference)
lead mils
target
45.7
2.0
1828.8
45.72
0.25
1.0
0.5
90
91.4
4.0
1828.8
228.50
1.25
2.0
1.0
100
182.9
13.5
1828.8
228.50
1.25
7.5
3.3
100
182.9
40.0
1828.8
228.50
1.25
20.0
9.8
100
365.8
12.0
274.3
34.29
1.25
7.5
19.6
100
365.8
20.0
274.3
34.29
1.25
10.0
32.6
100
365.8
40.0
274.3
137.16
5.0
20.0
65.2
100
3.5.9.3.5 Operation on slopes. When the vehicle is canted or pitched on slopes up to and
including 15 turret attitude, the gun control system shall be capable of gun laying on a 0.25 mil
stationary target as specified in 3.5.9.3.3 and table IV, except the time limitation need not be met
for manual operation. Turret chatter shall be allowed only when turret unbalance tends to cause
turret rotation in the direction of manual traverse. The gun control system performance on level
terrain shall not be affected in any manner as a result of vehicle operation on slopes. The combat
load may be simulated (see 4.6.4.9.3.5).
3.5.9.3.6 Stability of operation, vehicle stationary.
3.5.9.3.6.1 Non-stabilized mode. With the vehicle in the non-stabilized mode and either
level or on slopes not exceeding 15 turret attitude, and turret power activated or deactivated, the
gun shall not move more than 0.5 mil in azimuth or elevation during a 1 hour period
(see 4.6.4.9.3.6.1 and 4.6.4.9.3.6.1.1).
3.5.9.3.6.2 Stabilized mode. With the vehicle in the stabilized mode, and drift controls
properly adjusted, the gun shall not move more than 2 mils in azimuth or elevation during a
60 second period and the rate of drift shall not exceed 1 mil/second at any time during this period
(see 4.6.4.9.3.6.2).
3.5.9.3.7 Traverse and elevation limits. The angular 105mm gun movement and vehicle
clearance shall be in accordance with the following requirements (see 4.6.4.9.3.7).
a. At positive elevations down to 0, the gun shall be capable of being traversed for
360 by power and manual controls with the elevation and traverse power switch ON.
The traverse shall be accomplished without vehicle interference.
15
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