Authorization to conduct any GPS operation under IFR requires that:
a) GPS navigation equipment used must be FAA-approved and the installation
must be done in accordance with FAA requirements
i) Approval for the use of the GPS for IFR operations, and any
limitations, will be found in the airplane's POH (also called
the FAA-approved Airplane Flight Manual) and the airplane's
logbook
ii) VFR and hand-held GPS systems are not authorized for IFR
navigation, for instrument approaches, or as a principle
instrument flight references. During IFR operations, they
may be considered only an aid to situational awareness.


This seems fairly clear to me.....


Shh...don't let the facts get in the way of ones mindset.

A primary reason that handheld/VFR GPS units are not acceptable for
VFR use is that they not not include an integrity capability. That is
essential for IFR ops.

Ron Lee