Ross Richardson wrote:
Dave S wrote:

Mort.. welcome back into the air.

First off.. I am assuming that the Garmin 430 or other GPS is
certified for use in approaches IN YOUR INSTALLATION.. that usually
means a couple of specifics when installed and configured, and also a
current database. When you power the box up it will indicate if you
are able to use it for VFR navigation only. In the case of the 430, I
cant rightfully think of why someone would by a $10,000 box and not
have it installed to its fullest capability..

anyways.. You can use an IFR certified GPS LEGALLY to substitute for
an ADF or DME if the navaid's physical location is in the supplied
database (user made waypoints dont meet this requirement). So as long
as you have an IFR GPS, with current database, it would substitute
where an approach has "ADF" or "DME" required on the plate. I am not
referring to NDB approaches, but keep in mind that in many many
instances, NDB and other approach paths have "overlay" approaches that
are GPS procedures.. so chances are if there is an NDB approach into
someplace, there is likely also a GPS/RNAV approach into there as
well. My information is a little dated here, so if there is a more
correct version, someone will surely update this thread.

Most of my GPS use has been with king products with minimal time
behind the Garmin.. did safety pilot a few times with a guy using dual
430's..
Pretty much in your scenario, with the ILS approach, with an ADF for
the IAF.. one possible way to tackle this is to have the Direct To set
to the ADF location/identifier. Then set the Nav to the ILS frequency,
set the panel CDI to indicate NAV instead of GPS.. and fly the needles..

The needles will give you your ILS info.. the GPS in the stack will
give you distance and bearing to the IAF (NDB).. and the moving map
will show you a pretty purple line going to your IAF. I do not recall
if the 430 has ILS approaches "overlaid" in its database for GPS
situational awareness. If this is the case, selecting the ILS approach
on the GPS flight plan would provide GPS guidance that would
automatically sequence you past the ADF in question.. and probably cut
the workload. You'd still fly the ILS needles in either case,
regardless of how you dial the GPS in.

There is lots of good reading on AOPA's website that is archived over
the years on issues like this.. Find you an instructor who is savvy
with the new boxes and go play for a bit.. or find a pilot who is
really savvy and have him be your safety pilot and again.. go play..

There is also a free software download you can get from Garmin
(www.garmin.com) that is a "trainer" for their 400/500 product line
that can get you more familiar with it. The manuals are also available
for download for free if I remember correctly. Do some homework now
and save some money later.

Its a brave new world out there, Mort..
Dave (RN too)

Mortimer Schnerd, RN wrote:

I actually posted this in another aviation newsgroup in which I
actively post all the time but didn't get a reply... I assume because
of the crash in Manhattan got everybody's attention. That being
said, I'm still hoping for some insight from the more recently trained.


==== cut begins ====
I'm still a little confused how I'm expected to legally fly an ILS
approach that
uses a NDB as its IAF with a GPS on board instead of an ADF. (For
example, the
ILS Runway 2 approach into KUZA (Rock Hill, SC)). The rental
aircraft I have
access to these days all come with GPS, which is very nice, but I
still want my
ADF for the little airports I sometimes fly into.

Feel free to educate me... I was out of flying for 15 years and the
technology
passed me by. The last time I was flying regularly LORAN was just
coming to
aircraft, and everybody was flying ILS, NDB, and VOR approaches. I
took an IPC
to get my instrument currency up to date but we used the older
equipment with
which I was already familiar. I'm comfortable enough setting up a
Garmin 430 to
navigate to another airport but that's about the limits of what I can
do with
one. Don't have a clue about GPS approaches....



Be careful with the DIRECT TO command. I have KLN 89/B and it will not
enter the approach mode from Direct to. You must be on a flight plan
(e.g., from some point TO some point). Then you can select the approach.
Like Dave said, many NDB approaches have a GPS overlay. But what is
really nice is the GPS only "T" approaches. Very easy and no reversal turn.

With a Garmin 400/500 so long as the approach is loaded, going direct-to
some fix prior to the FAF will not adversely affect approach sequencing.