When cross-range firing is not permitted, what markers must be used?

When cross-range firing is not permitted, the use of internal left and right limit of fire markers is essential for maintaining safety and ensuring that all personnel are aware of the boundaries of the firing area. These markers clearly delineate the safe firing zones, preventing any rounds from potentially straying beyond the designated areas, which could pose danger to bystanders or non-combatants in the vicinity.

These markers serve not only as visual references but also as points of emphasis for shooters, reinforcing situational awareness regarding the limits of their firing positions. It is crucial in a controlled environment like a range that shooters consistently stay within these defined limits to uphold safety protocols.

Other options such as visual markers only, thermal signatures only, or external limit markers may not provide the full scope of safety required for cross-range firing restrictions, as these alternatives may lack the specificity or immediate clarity needed to guide shooters effectively within the range constraints. Therefore, employing internal left and right limit of fire markers is the best practice to ensure safety when cross-range firing is not allowed.