In article ,
Roy Smith wrote:
My understanding (somebody please correct me if I'm wrong) is that some
of the newer units (I'm thinking specifically of the CNX-80) are
certified such that you don't need an external CDI, as long as the unit
is mounted so that the built-in one is within some specified distance
from the pilot's center of vision, or some such.

I think that applies to the annunciator (msg, ptk) which is displayed in
the lower-lefthand corner of the CNX-80. I don't think it applies to
the CDI, but you could download the install guide from Garmin's site and
find out. I looked into it once. Sadly my radio stack is too far from
the centerline.

--
Ben Jackson

http://www.ben.com/