On Mon, 30 Aug 2004 22:04:32 -0400, Roy Smith wrote:

In article ,
"G.R. Patterson III" wrote:

Roy Smith wrote:

Get a GPS. Some of them have built-in CDI right on the front panel
display. I don't find them very convenient, but they are legal.

I thought you had to have a separate CDI to use one as a primary navigation
tool for approaches. Is that incorrect?

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.


As I understand it a "separate" CDI means one not shared by two
navigation devices (radios). Having the built in display adheres to
the separate requirement. I don't believe there is any requirement to
use an external display.

HTH.
z