"Mick Ruthven" wrote in message m...
Unless I'm missing someting here, an IFR approved GPS receiver (GPS only,
not a combination GPS, VOR, LOC unit like some of the newer ones) like the
KLN 89B will contain GPS approaches in the database.

Some units, including GPS-only units, have all published approaches in
the database, including navaid-only approaches.

To fly VOR-only or LOC
or ILS or NDB approaches you need to use the avionics for those approaches,
not a GPS.

Yes, that's right.

This begs the question, why do the GPS's have approaches in their
databases that you can't use?

The answer is: For Reference Only. Someone else mentioned that the
KLN94 even tells you that you can use it for reference only when you
dial it up.

The benefit is that using GPS as a reference for navaid-based
approaches is a GREAT way to easily increase your situational
awareness. Especially if you have a moving map. It's so nice to see
where that localizer back course is with a quick glance when you're
trying to juggle charts and minimums and waypoints based on remote VOR
radials.