The Blue Avionics BA-440 Router/Filter provides Safran Engineering Services and Duncan Aviation with the SBAS GPS interface and full ADS-B system monitoring for their supplemental type certificate (STC) of Automatic Dependent Surveillance-Broadcast (ADS-B) solutions on Bombardier Challenger CL601-3A/R aircraft with Honeywell GNSSU HG2021GD04/06 and Rockwell Collins TDR-94D (-500 series) transponders.