What airspace will be affected by Mode S requirements for VFR flights?
The airspace affected will be declared in the national AIPs. The Mode S implementing States, however, have made it clear by, the issue of AICs, which parts of the airspace they intend to designate for the carriage and operation of Mode S ELS airborne equipment. Generally speaking, the airspace where an SSR transponder is already mandatory will become subject to Mode S. A final implementation date of 31 March 2008 has been coordinated between the participating States. This date, which may in some situations be subject to a transition phase, takes account of the ICAO Annex 6 requirements for ‘all aeroplanes to carry and operate an SSR transponder’, and, also when the density and complexity of the airspace is likely to justify it.
