Phoenix-based Honeywell announced last month it had received TSO approval for phase IV, the latest version of the Primus Epic control display system/retrofit (CDS/R). The phase IV upgrade will allow the CDS/R to display electronic charts and maps, as well as satellite weather. In addition to the electronic charts and weather, Honeywell said the CDS/R offers an 8- by 10-inch full-color screen, GPS, satcom capability, TCAS and EGPWS.