What is the main purpose of an Air Corridor?

The main purpose of an Air Corridor is to establish a designated route through which aircraft can safely navigate while avoiding congested airspace or conflicting flight paths. This management is crucial for ensuring both civilian and military aircraft can operate without interference. Option D captures this purpose effectively by suggesting that the Air Corridor functions similarly to a Restricted Operations Zone (ROZ), but further specifies the required details such as the corridor's name, width, and the date-time group (DTG) for its start and end, which are essential for operational clarity and safety.

The correct choice emphasizes the structured management of airspace, ensuring that aircraft can traverse regions with a clear understanding of restrictions, timelines, and boundaries. This level of organization enhances situational awareness for pilots and enhances the overall safety of air operations, particularly in complex environments.

In contrast, while defining a safe altitude for all aircraft, facilitating communication between units, and providing information on the target area are important for various operational components in air traffic management and military operations, they do not encompass the specific role and detailed definition that an Air Corridor serves.