A communication frequency associated with an airport facility.
Frequency in MHz (e.g. 119.1, 121.9).
Optional
Sectorization or applicability description (e.g. "RWY 04L/22R", "FREQS 2000 FT & BLW").
Purpose or usage of this frequency (e.g. "LCL/P", "GND/P", "ATIS", "UNICOM", "CLASS B").
A communication frequency associated with an airport facility.