The AIRPORT section contains the location, frequency, and name of all the Airports within the sector. Below is an example on how to define a airport. Please note the ruler surrounding the data. This is not required in your sector file but is handy.
The first field is the airport name followed by the tower/CTAF frequency then the latitude and longitude and finally the class of airspace it is.
Airspace classes will result in the following when the airspace option is enabled in Pro Controller
| Class A | Nothing |
| Class B | 30nm ring |
| Class C | 5nm and 15nm ring |
| Class D | 5nm ring |
| Class E | Nothing |
[AIRPORT]
;----*---1---*-----2--------*3---------4---*
KORD 120.750 N041.58.46.542 W087.54.16.071 B
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