An avionics system includes a human-machine interface (HMI), wherein the HMI includes a display device that displays information to an operator and an input device that receives input from an operator; a storage device that stores master air traffic control (ATC) center data; a memory device that stores separately loaded ATC center data and hard-coded ATC center data, and a processing device communicatively coupled to the HMI, the storage device and the memory device. The processing device compares the separately loaded ATC center data with the hard-coded ATC center data; requests operator validation of changes between the separately loaded ATC center data and the hard-coded ATC center data using the HMI; and updates the master ATC center data when the operator validates the changes between the separately loaded ATC center data and the hard-coded ATC center data.