Garmin 430 and ILS
The Garmin 430 documentation says that you can use the GPS for course
guidance on an ILS/LOC up until the final approach fix. Where exactly
does the approval for this come from? My inclination would have been
that in absence of an overlay, you could not use GPS anywhere after
the IAF.
Also, assuming this approval is legit, shouldn't this extend to a
non-overlay VOR approach?
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