The ITU Radiocommunication Assembly,
considering
a) which should be capable of providing adequate capacity in all regions of operation;
that user demand has been expressed for an automated airborne voice/data public correspondence system
b) that public mobile telecommunication services, i.e. services for aeronautical public correspondence via radio stations connected to the public-switched telephone network are (or will be) in operation in a certain number of countries;
c) that the bands 1670-1 675 MHz and 1800-1 805 MHz are intended for use, on a worldwide basis, by
administrations wishing to implement aeronautical public correspondence (see No. 740A of the Radio Regulations(RR));
d) especially those which provide safety services;
that it is essential that such systems be fully compatible with other systems utilized on board aircraft,
e> operational utilization of the systems,
that worldwide system compatibility/inter-operability is desirable in order to maximize the possibilities of operational utilization of the systems.