Recently, I was looking at potentially moving from the GTN suite to the UNS-1.  One of the appeals to this was the enroute VNAV.  This would obviously make RNAV Departure and Arrival procedures a lot easier with less math and head guessing (TLAR).  As I'm fortunate to have a rather up to date GTN, and the fact that the GTN does the approach guidance and VNAV makes it appealing to keep the GTN.  My question is, is there a way to couple the enroute VNAV with the F1 GTN?  I know I can enable VNAV and have it display the vertical track, but is there a way to actually get the autopilot to follow it with little input?  Thank you.

If you're just talking about STARs and approaches, my workaround is to set up the STAR and approach in the GTN, then I activate APPR mode, and when it's time to descend, the autopilot will follow the the vertical track guidance. However, I do this on the F1 GTN, not the RXP version.

If it fails to engage, then I select the altitude box next to the fix I want, then hit Direct To, then APPR. It sometimes needs a little redirection, but I get it to work nearly every time.

On 1/18/2022 at 8:16 PM, medx421 said:

way to couple the enroute VNAV with the F1 GTN?

If your referring to coupling the MCU/AP VNAV to the GTN then the answered is no. Believe it's been said that it would take a custom AP to couple to the Garmin trainer F1 or RXP.

Edited January 29, 20224 yr by Adrian123

Thank you both for your time and responses.