"Stand Alone" Boxes (Garmin 430) - Sole means of navigation - legal?

In article , "Ron Natalie"
writes:

Since the Garmin 430 contains not only TSO'd
GPS but also VOR, LOC, GS, etc., my position is that this unit (without any
other navigation equipment on board) is legal as a "stand alone" for use en
route, terminal, and approach

Yep. As a matter of fact, many new aircraft are delivered with only
430/530's
as nav equipement.

A single 430 should not be used with the Idea that a VOR will always be
available if the GPS goes south. I had the display in my 430 fail which made
the COMPLETE unit inop.( unless you knew where the com was and could count the
clicks :-) )

Chuck