C J Campbell wrote:
"Dave Katz" wrote in message
...
| "C J Campbell" writes:
|
| with advanced aircraft systems. Perhaps the task should be automated --
dial
| in a localizer or ILS, and the CDI automatically switches to NAV.
However, I
| can envision problems with this approach as well, so to speak. :-)
|
| The Garmin units do this if you select an ILS approach (which puts the
| localizer frequency into the standby) and remember to flip the
| frequency to active. You get GPS guidance through the procedure until
| you're inbound and intercepting the final approach course.
|
| Of course, then you have to remember to put it back into GPS mode if
| you want missed approach guidance.
|
| I believe this is configurable.

Yeah, my GARMIN GNS 430 would do that. Instead of an external NAV/GPS switch
such as you see in most GPS installations, the GARMIN units have the switch
built into the panel. GARMIN can do this because their units are all-in-one
boxes, so it is a simple matter to switch program that in. Even though the
CNX-80 the OP used is also an all-in-one box, it appears that it must be
switched manually.

I have not yet seen a GARMIN 1000 installation, but I understand that it
works more like the GNS-430/-530 units.



The opposite problem can also happen. The last time I was out
doing practice approaches, I failed to switch the CDI to GPS
mode on a GPS approach until the safety pilot pointed out the
error. The 530 I have always reminds me to switch the CDI
to LOC mode on an ILS approach, but has no reminder to get
it off LOC for a GPS approach when, of course, the CDI is reading
some random VOR or ILS you happen to be tuned to but aren't thinking
about. There are an amazing number of errors you can make with
a GPS, though the moving map is incredibly helpful for spatial
awareness.

--
David Rind