MIL-T-62222(AT)
requirements shall be met by the gunner's and commander's controls and by the manual controls as specified in table IV (see 4.6.17.3.4.2.1).
3.5.3.4.2.2 Gun laying on moving target and tracking accuracy. With the tank in a stationary position, the time required to lay the gun sight reticle within the borders of a moving target from an established lead angle shall not exceed 3.5 seconds in any instance as specified in table V.
The target shall be as specified in the table and shall be moved over a horizontal crossing course.
The lead angle shall be established with the line of sight aimed behind the moving target at which time the line of sight may be stationary or moving at a speed equal to or less than the target speed. After the reticle has been positioned within the borders for the length of the course in accordance with percentage of time on target specified in the table. This requirement shall be met with the gunner and commander power controls (see 4.6.17.3.4.2.2).
TABLE IV. Gun laying on stationary target.
Layoff - mils |
Average time seconds |
|||
Position |
Azimuth |
Elevation |
Manual operation |
Power operation |
1 2 3 4 5 6 7 8 |
0 25 25 100 400 800 1600 3200 |
10 10 10 0 0 0 0 0 |
2.0 5.0 5.0 4.5 13.5 |
2 5 5 4 5 6 8 13 |
TABLE V. Gun laying on moving target and tracking accuracy.
Percent of time on target |
Traverse rate mils/sec (ref) |
Established lead mils |
Target size mils (square) |
Target size centi- meters (square) |
Target range meters |
Target velocity mph |
Length of course meters |
90 100 100 100 100 100 100 |
0.5 1.0 3.3 9.8 19.8 32.6 65.2 |
1.0 2.0 7.5 20.0 7.5 10.0 20.0 |
0.25 1.25 1.25 1.25 1.25 1.25 5.0 |
45.72 228.50 228.50 228.50 34.29 34.29 137.16 |
1828.8 1828.8 1828.8 1828.8 274.32 274.32 274.32 |
2.0 4.0 13.5 40.0 12.0 20.0 40.0 |
45.72 91.44 182.88 182.88 365.76 365.76 365.76 |
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