Which of the following is a characteristic of 'SUA'?

The correct choice highlights that 'SUA,' or Special Use Airspace, is designated for specific activities that are often military-related, but can also include other specialized operations such as space operations, aerial gunnery, and more. This airspace is set aside to ensure that these activities can occur safely, often requiring the exclusion of other aircraft to protect both the operations taking place and any surrounding air traffic.

When the airspace is designated as SUA, it serves important purposes such as training for military exercises, testing new technologies, or conducting traffic management for events where the general aviation community may need to be aware of restrictions. The other options do not accurately represent the characteristics of SUA. For instance, while restricted navigation can occur in these areas, SUA is distinct in its focus on activities requiring special permissions rather than just restriction. The emphasis on fuel considerations is unrelated to the designation of SUA, and the implication that only private flights can occur in such areas doesn’t align with their primary role, which can involve many types of flight operations subject to restrictions due to safety protocols.