Before revision: Frequency use The European Frequency Management Manual of the International Civil Aviation Organization, ICAO contains, among other things, the following regulations for the use of frequency channels for the VHF Data-Link: VDL Mode 1 : Channels 131.525, 131.725 and 131.825 MHz can be used for VDL Mode 1 (ACARS).
After revision: Frequency use The European Frequency Management Manual of the International Civil Aviation Organization, ICAO contains, among other things, the following regulations for the use of frequency channels for the VHF Data-Link: ACARS : Channels 131.525, 131.725 and 131.825 MHz