Thx Bob - I did a bit more research and now see there may also be a few more issues with the GRT unit. Appears as though it does not output a timing signal. Looks like all the other approved GPS sources do that.
Thanks again for the info...I will concentrate my efforts elsewhere. Sure wish I could access my 430W wiring bundle easier!
Thanks again for the info...I will concentrate my efforts elsewhere. Sure wish I could access my 430W wiring bundle easier!
To get an AMOC approved, you have to substantiate to the FAA that the GPS meets all their requirements. Doing this from scratch is a rather onerous task.
The reason we were able to turn the AMOCs around quickly was that the Garmin GPSs were already approved position sources for other ADSB vendors. We didn't have to prove they met the requirements, since they were previously approved by others. All we had to do was document how they were going to be interfaced with the ADS600-B.
In other words, if you don't see the GPS on this list (https://www.faa.gov/nextgen/equipadsb/equipment/), you'll have a whole lot of data you'll have to document and get reviewed by the FAA.
While the Navworx manual may not have listed all the Garmin GPS by specific model number, it does have the interface requirements, which are identical for all of them. You mentioned the GTN series, which was my AMOC. You have two interface options (ARINC and RS-232) and the protocol is ADSB+. Per the second round of AMOCs, any of the GTN family will meet these requirements.