OP,It appears as if Karelia uses several different custom objects/groups to depict airfields...
I was intrigued by your original post and did some sleuthing in the Mission Editor...
Not only are fields rotated frequently (or so it appears as much), the layout of types within a type group varies as well.
That is to say that its possible/probable Large Field X is not the same as Large Field Y irrespective of rotation
Creating canned generic field layout maps in the classic sense appears as if its moot.
As an example here are 3 Large Fields as viewed offline in Gods Eye mode (perspective North)...all different
Notice the subtle and not so subtle differences...aside from rotational considerations...
I like it...forces folks to do intelligence on targets ahead of an attack...
Oneway