Discrete Emergency Frequency
- Direct contact between an emergency aircraft flight crew, Aircraft Rescue and Fire Fighting Incident Commander (ARFF IC), and the Airport Traffic Control Tower (ATCT) is possible on an aeronautical radio frequency (Discrete Emergency Frequency [DEF]) designated by Air Traffic Control (ATC) from the operational frequencies assigned to that facility.
- Emergency aircraft at airports without an ATCT (or when the ATCT is closed) may contact the ARFF IC (if ARFF service is provided) on the Common Traffic Advisory Frequency () published for the airport or the civil emergency frequency 121.5 MHz.
Radio Call Signs Preferred radio call sign for the ARFF IC is “(location/facility) Command” when communicating with the flight crew and the FAA ATCT.
ARFF Emergency Hand Signals In the event that electronic communications cannot be maintained between the ARFF IC and the flight crew, standard emergency hand signals as depicted in FIG GEN 3.7-1 through FIG GEN 3.7-3 should be used. These hand signals should be known and understood by all cockpit and cabin aircrew, and all ARFF firefighters.
FIG GEN 3.7-2