Kind of Special Facilities
Command Center
A command center is normally defined with additional tags.
Use of Civilian Airport
Many military bases have not their own airfield, but use a basically civilian airport. But the difference between a civilian and military airport is not clear. Especially the airports in Afghanistan are defined as „military/civilian“ in Wikipedia.
Airplane Landings Sites and Helipads
The military defines not only Air Force bases but also all helipads as airfields.
In Visualbases all „airfields“ which can only used by helicopters are defined as helipads, different from military airplane landing sites.
Communications Station
This definition means: Radar systems and gateways as part of a global network, normally for special purpose. Mostly these installations have separate postings as special facility view and additional tags like Fac_Radar or Fac_Listening.