The II Morrow / Garmin AT Apollo GX-65 offers all the capability of the GX-55 IFR En Route certified GPS, but it also adds a very sophisticated COMM transceiver. However, please note that the GX-65 is not a slide-in replacement for the Apollo Lorans and Flybuddy GPS systems. (The COMM functions could not be added while still using that legacy connector.)

The COMM section in the GX-65 is a 760 channel radio with active / standby flip-flop. It is possible to listen to the standby frequency while the radio monitors the active frequency for any activity. This is almost like having two separate radios, because you can gather additional information on another frequency while making sure you are not missing a transmission.