LLogann,
I believe he (Stroker71) is talking about the status of enemy bases. When you check an enemy base, whether it has an airstrip or not,
it will show that fighters/bombers are enabled. So that you cannot determine if a port is only a port or if it has an attached airfield
simply by looking at the clipboard.
I haven't looked at this myself to see if that's the case or not, but it's what I'm understanding from his posts.