Good morning Geoff,
The GTR 200 can accept frequency tuning data from any Garmin portable GPS unit that supports the "VHF Out" RS-232 data format. This includes the GPSmap 296/396/495/496, GPSmap 695/696, the aera 5xx family, and the aera 795/796. It also can interface to the GDU 37x cockpit display when it is configured either as a standalone panel-mounted MFD or as part of a complete G3X EFIS system.
The GTR 200 can also receive database information via the same RS-232 interface that allows it to display comm frequency identification information on its own front-panel display. For example, if you manually tune a frequency of 118.450, the GTR 200 will automatically decode and display it as "KFLY AWOS". The database information is transferred automatically from the GPSmap 695/696, the aera 5xx family, the aera 795/796, and the GDU 37x cockpit display unit.
- Matt