The GDL-88 is capable of receiving and transmitting on both 978 MHz (UAT) and 1090 MHz (Mode S Transponder). This will allow the GDL-88 to send position data on both 978 MHz and 1090 MHz. It is also capable of receiving FIS-B weather data on 978 MHz. The GDL-88 is also capable of interfacing with TCAD/TAS/TCAS I systems for a "fused" situational awareness display for the flight crew.