What is one of the key purposes of the Airspace Coordination Order (ACO)?

The key purpose of the Airspace Coordination Order (ACO) is to manage the use of airspace effectively. The ACO serves as a vital component in military operations by ensuring that all units involved are aware of the designated airspace assignments and the associated deconfliction measures. This helps to avoid conflicts between different forces operating in the same region, particularly in multi-domain environments where air, ground, and maritime operations occur simultaneously.

By providing a structured framework for coordinating airspace usage, the ACO facilitates safe and efficient operations, supports mission objectives, and enhances situational awareness among all participating units. This level of coordination is crucial for successful execution of operations, especially in complex scenarios where multiple aircraft and ground units are interacting.

The other options, while relevant to various aspects of military operations, do not encapsulate the primary operational focus of the ACO, which is specifically tailored to airspace management rather than leadership designations, readiness evaluations, or equipment procurement.