What information is conveyed by the second digit in the location designator?

The second digit in the location designator indicates the tier number associated with the facility or area. In munitions systems, tier numbers are important for understanding the classification of a facility in terms of its operational capabilities and safety protocols. Each tier reflects a different level of mission capability, which helps in organizing and assigning appropriate resources and safety measures to that particular area.

While other choices reference different aspects of a facility, none correlate to the designated purpose of the second digit in the location designator as accurately as the tier number, which specifically categorizes the facility based on its operational scope. This classification aids personnel in quickly grasping the functionality and limits of an area, which is critical for effective munitions handling and safety compliance.