Radio channels and functional channels
Aircraft station radio frequency range. An aircraft station shall be capable of tuning to any of the channels in the range specified within 100 milliseconds after the receipt of an autotune command.
System capabilities
The VDL system shall provide link layer data broadcast services (Mode 2) and/or voice and data broadcast services (Mode 3). For VDL Mode 3, the data broadcast service shall support network multicasting capability originating from the ground. Ground network transition. A VDL-equipped aircraft shall transition from one ground station to another when circumstances dictate