Advanced Garmin 480 feature

I was browsing a few aviation related blogs that I enjoy reading from time to time, and I ran across this interesting article describing the hold function of the Garmin 480. I find it quite interesting to note the Garmin 480 is the "...only panel mounted GPS with WAAS that is IFR certified under TSO C146 for use as primary navigation." John goes on to describe this as being able to navigate along airways, such as a VOR, even if the waypoint is out of service. Interestingly enough, the Garmin 430/530 and G1000 are certified under TSO C129 for IFR flight, meaning that they cannot be used as primary navigation if any navigational aid is out of service.

He has several nice screens showing what a hold looks like, and how if the aircraft is so equipped, can be flown with the autopilot. This is quite interesting, as I have done several practice holds with Roy in his Twin Comanche, and he just so happens to have the Garmin 480 in his plane.