Originally Posted by acdii

My curiosity has me going. What defines an "airport"? There is an airport with a passenger terminal, then there are "airfields" with nothing more than a grass strip, sometimes not even lit, and a few hangers with no control tower, or even a flight house(whatever they call where you put in flight plans). There are several of them within 5 miles of where I fly, but since none have any sort of "control tower" how would you notify them of any events or such? To me this is a huge gray area that needs to be defined.