unicom frequencies
UNICOM is Universal Communications known by its abbreviation, UNICOM. It is an air-ground communication facility operated by a private agency to provide advisory service at uncontrolled aerodromes and airports. Each location will have a UNICOM frequency assigned by request to the FAA to hopefully keep interference to a minimum. Common Frequencies used by Unicom bases are 122.8 MHz,122.7,123.0,122.725,122.975,123.050 and 123.075 . (at least in the US) These are also CTAF (Common Traffic Advisory Freq.) See a great usage article at http://www.aopa.org/whatsnew/air_traffic... Hope that helps.