Tauno Voipio wrote:


The GPS heading information is taken as differences
of position fixes. It is prone to pretty bad errors,
and probably of too low quality for AP reference.


I have flown AP equipped planes that take their steering from the CDI...
which in some cases is driven by a VOR/LOC and in some cases driven by a
GPS. Direct heading info, no.. deviation from desired course... yes.

Same succeptibility to GPS errors.. of course.

Dave