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Old January 17th 07, 08:56 AM posted to rec.aviation.ifr
Chris Quaintance
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Posts: 5
Default Commencing a GPS approach from a fix other than the FAF


Dave Butler wrote:
When you selected the procedure from the database, it looks like the
only IAF is MOVER, so you must have selected the approach starting from
MOVER. So EWTOF should have been added to the flight plan (no?) and you
should be able to select DIRECT EWTOF from the flight plan(?), rather
from the NRST list. Then I think the 480 would have auto-sequenced you
through the rest of the approach.

snip

EWTOF was nowhere to be found.

You shouldn't have to "insert" it. It should have been added to the
flight plan when you selected the approach starting from MOVER. Did you
remember to EXECUTE the flight plan change? Did you EXPAND the flight
plan to see all the waypoints? I think EWTOF/ECYON should have been there.

Yes, I did execute the flight plan change and expand the plan to see
the waypoints. Again, UBBEP was the first waypoint of the approach. I
verified this behavior with the 480 sim.

In the 480, they all commence with an IAF (not FAF). In the 296, I think
only the FAF is shown on approaches. The 296 is only for
situational-awareness, after all. You can have an output from the 480
that automatically copies the flight plan from the 480 to the 296. I do
that with my 396. Then the 296/396 knows about all the same waypoints
as the 480.


Well, in my experience, the two approaches I referenced in my initial
post commence with the FAF on the 480. We'll leave the 296 on the yoke
out of it (even if there's yolk on my face!).

So, either I'm doing something incorrectly whilst loading the approach,
or there is some inconsistency or problem with these approaches and my
setup.

Interestingly enough, I was able to spend a very brief time behind a
530 today and it seemed to have "better" behavior in this regard. I
easily was able to commence the approach (to a different airport) from
a variety of fixes that were available on the plate.


You might want to join the GNS480 users group at
http://groups.yahoo.com/group/gns480-users/


I have already done so. Thanks for the lead.

Appreciate your time!
--Chris