In article ,
says...
writes:

WAAS most certainly is part of the GPS system, LAAS is in development, and
differential is a matter of interpretation.

None of them is. They are separate systems that depend on GPS; they are not
part of GPS. Anyone can construct a GPS augmentation system, but that doesn't
make it part of GPS.

You won't see any improvement from WAAS because France isn't in the
current service area.

That does not change the fact that WAAS is not part of GPS.

There is no need to so aptly demonstrate your stupidity.

What is WAAS or RAIM etc etc - any aviation GPS technology - without GPS
itself?

These technologies are little more than GPS enhancements so that
aviators can use them to provided required and determined accuracy.

GPS is otherwise useless for aviation - handy for a VFR pilot - but it
must not be relied on for either altitude or positional data - it's an
aid only.

Coupled with (say) WAAS - the GPS becomes a reliable intrument for an
instrument approach.

Pull your head out of your arse.

--
Duncan