When using cross dialing, what is a consideration for long spans?

Cross dialing is a technique used in alignment processes where measurements are taken at various points to ensure proper alignment, especially in long spans. The specific consideration regarding long spans is that as the distance between points increases, small errors can become amplified, which may lead to less accuracy in the alignment setup.

In longer spans, the sensitivity to alignment discrepancies is heightened because the angular disposition can change more significantly with distance. Therefore, slight misalignments can have a more pronounced effect compared to shorter spans. This means that while cross dialing can work effectively, careful attention must be paid to ensure the accuracy of measurements, as longer distances can compromise precision if not conducted with meticulous care.

The potential for inaccuracies in long spans emphasizes the importance of a thorough understanding of the method and an emphasis on precision during calibration and measurement.