What is a unique feature of an Aerial Mail Terminal?

The unique feature of an Aerial Mail Terminal is that it functions as a hub for the processing and transfer of international mail. This facility is designed to handle large volumes of mail that are transported by air, making it essential for connecting different regions and countries efficiently. Aerial Mail Terminals facilitate the quick transfer of mail as it moves across borders, ensuring that international postal services are streamlined and effective.

In contrast, while some terminals may be exclusively or primarily for military use, this is not a defining characteristic of Aerial Mail Terminals as a whole. Their primary role revolves around international mail handling, rather than serving specific military functions. The other options also fail to capture the essence of what distinguishes an Aerial Mail Terminal, as they suggest limitations in scope or service that don't align with the facility's broad operational capabilities.