Vertical shift is only sent in the target location if the difference in vertical shift is greater than or equal to how many meters?

The correct choice highlights that a vertical shift is only communicated if the difference in elevation is significant enough, specifically 35 meters or more. This is important because minor changes in elevation may not significantly impact targeting, and thus, the data on them may be unnecessary or irrelevant for operational precision. By requiring a minimum shift of 35 meters, operations can maintain clarity and focus on more relevant data that could influence targeting decisions.

The second part of the answer indicates that a minimum difference of 5 meters must also be observed, ensuring that even minor shifts are addressed when necessary, but only in the context where they might affect the overall operation. This two-tiered threshold helps streamline communication and enhances the efficiency of artillery operations, as only shifts deemed significant enough are reported.