GATES supports which of the following types of sites?

GATES, or Global Air Traffic Management System, is designed to support various site types that play a critical role in managing air transportation effectively. The correct choice identifies fixed, deployed, and mobile sites as essential components of the GATES framework.

Fixed sites are established locations with permanent infrastructure where air traffic management activities can be performed reliably. These would include air traffic control centers and airfields, which provide a steady and consistent operational environment.

Deployed sites refer to those that are set up temporarily in response to specific needs, such as during operations in a contingency environment or during disaster relief missions. They must be flexible and adaptable, fitting the operational requirements of transient or unexpected situations.

Mobile sites denote locations that can be readily moved or relocated as needed, such as mobile air traffic control units. These are particularly valuable in providing support in various circumstances, including operations in remote areas or regions lacking permanent infrastructure.

By encompassing these three types of sites, the GATES system is able to maintain a high level of operational efficiency, responsiveness, and adaptability which are crucial in the ever-changing landscape of air transportation management.