What does "range card" refer to?

A range card is a critical tool for gunners as it provides detailed information about the terrain and target distances in a specified area. This document typically includes vital data such as the locations of enemy positions, key landmarks, and any other relevant information that could assist in targeting and artillery operations. By having this information readily available, gunners can improve their accuracy and effectiveness during engagements. This specificity is essential for planning and executing successful firing missions, as it helps gunners understand their surroundings and make informed decisions based on the geographic and tactical environment.