This is for KNOWING what the heck you have at any particular airbase.
To truly see all the aircraft in the air base you must click the AIRBASE in the table above. Clicking air bases on the map is not representative of what is there ( unless only 1 type exists there). AG's on the map do more harm than good as they often overlap at any particular airbase and do not "cross reference". Thus total confusion will result.
By clicking the airbase on the table ( not the map) it manages this for you !! Thus, you will then see the the other air types that ALSO exist at that airbase. ie ALL.
This can be incredibly frustrating if you are depending on clicking the air base on the map and thinking

Table ----> Airbase NOT map ------> airbase... Save your sanity.
As you become proficient in this you can keep airbases running effectively and not have supply problems.