The complete network of the main stations shall be reobserved in 1998.
Areas missing are namely the Alpine regions due to topographic obstructions.
A second service by a private company using AMDS is in the phase of testing. Differential Services Ref. Distribution Charges Users Zimmerwald Swisstopo with SRG, Swisscom and DCI Inc. Multipath effects, interference and jamming problems were also investigated. Initially the B-RNAV will only be implemented at and above a specific height and for some designated departures, arrivals and on some feeder routes.