The STC certifies the installation of dual Garmin GTX-3000 transponders and uses either the Garmin GDL-88 SBAS/WAAS GPS or Universal Avionics SBAS/WAAS FMS GPS’s including the UNS-1Ew, UNS-1Espw, UNS-1Lw and UNS-1Fw FMS systems to comply with the FAA Automatic Dependent Surveillance-Broadcast-Out (ADS/B-Out) mandate requiring compliance before January 1, 2020.