This isn't absolutely neccessary for a GX-55, is it? (it was for my IFR cert.
GX-60)

-- Jay

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Jay:
Could you please explain how you can activate the vertical navigation function
on the GX55 when it does not have an altitude serializer input? Also how does
the GX55 know that you are above or below someone's airspace and therefor not
warn you about the class C airspace because you are 4300' agl?

There are plenty of avionics shops who have done a terrible job on GX55, GX60,
GX50, SL30, etc installs. The net result is only about half of the software
features of the units are hardware enabled.


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