B
Boeingstore
Guest
How are transponder codes assigned? Why do they seem to be similar for a particular facility?
Cap. Ricardo Reig
Member
Well, the transpoder or squawk codes are assigned by the ATC or by the control software, in the case of Mexico, the leading software is the Eurocat X
For this porpouse the criteria is based on the ICAO regulations where qre stablished the emergency and dedicated codes.
For emergency, the discrete codes are:
7500 - Hijacked
7600 - Radio/Communications Failure
7700 - Emergency
Also the dedicated, basic codes are:
1200 - For VFR Flights with unassigned code and below 12000 ft
1400 - VFR flights over 12000 ft
1500 - Helicopter on VFR Rules
2000 - IFR flight with unassigned code
The rest of the assigned codes are based on a destination and airpace criteria, for example if the aircraft destination is international, regional, national, intercontinental, etc.
And the idea is to never repeat a squawk code on the same area in order to have the accurate information of the flight and airplane.
For this porpouse the criteria is based on the ICAO regulations where qre stablished the emergency and dedicated codes.
For emergency, the discrete codes are:
7500 - Hijacked
7600 - Radio/Communications Failure
7700 - Emergency
Also the dedicated, basic codes are:
1200 - For VFR Flights with unassigned code and below 12000 ft
1400 - VFR flights over 12000 ft
1500 - Helicopter on VFR Rules
2000 - IFR flight with unassigned code
The rest of the assigned codes are based on a destination and airpace criteria, for example if the aircraft destination is international, regional, national, intercontinental, etc.
And the idea is to never repeat a squawk code on the same area in order to have the accurate information of the flight and airplane.