Global Navigation Satellite Systems (GNSS) in IFR aircraft and Mode S transponders in some CTA will be mandatory from Thursday 4 February 2016.
The following mandates will apply.
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All aircraft that operate under instrument flight rules (IFR) must be equipped with GNSS.
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Any aircraft operating at Brisbane, Sydney, Melbourne or Perth aerodromes must have an Automatic Dependent Surveillance-Broadcast (ADS-B) capable Mode S transponder.
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All aircraft operating under IFR in classes A, B, C or E airspace within the quadrant 500 NM north through east of Perth airport must be equipped with approved ADS-B equipment.
The requirement for ADS-B-capable Mode S transponders at these four capital city airports is because those locations use the Advanced Surface Movement Guidance and Control Systems (A-SMGCS) that requires aircraft to have Mode S. That particular mandate does not cover Canberra, Adelaide or Hobart.
These mandates are part of the move toward Performance-Based Navigation (PBN), which will require aircraft to be fitted with certain equipment. The next mandate is for all IFR aircraft to have ADS-B by 2 February 2017.