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Two, the placard "VFR only" means not approved for IFR operations. It
doesn't mean you are only allowed to use it when in VFR conditions.
Therefore it's as good as your sextant or stopwatch for navigation of
all kinds. As long as you have the required equipment on board, you
are all set.


The placard specified in AC 20-138 is "GPS limited to VFR use only". Use
of a GPS with such a placard during IFR operations, even on a cloudless day
with no restrictions to visibility, would be a violation of FAR 91.9(a).