Where should the boresight telescope cross hairs be aligned on a flagpole?

The correct alignment of the boresight telescope cross hairs on a flagpole is at the lowest visible left-hand point. This position allows for optimal calibration and alignment of the radar system, ensuring that the radar accurately tracks and identifies the source of artillery fire. By setting the cross hairs at this point, operators can achieve a precise calibration which is crucial for effective targeting and to minimize measurement errors in fire location.

Proper alignment at the lowest visible left-hand point also aids in compensating for the natural curvature of the earth and any potential distortions in the radar's view caused by the surroundings. This practice helps in maintaining accurate tracking and positioning, which is essential for the efficiency and reliability of the radar system during operations.