How different is aviation GPS?

In a previous article, B A R R Y said:
Paul Tomblin wrote:
In a previous article, B A R R Y said:
My Garmin 60CS, as well the eTrex Vista I previously owned, both use
WAAS corrections. I can't remember the last time I didn't get the
corrections.

I have a Garmin 296 with WAAS, and I get WAAS nearly every time when I'm
flying (but not always), but I only seem to get it about half the time
when I'm driving. But I live, fly and drive up near the Canadian border,
so maybe the coverage isn't as good up here.
I'm in CT, so being right on the east coast, and not right against the
Canadian border might have a positive effect. AFAIK, the two special
satellites are over the Atlantic and Pacific.

They're also on the equator, so the further north you go the more likely
they're going to be occluded by buildings and terrain when you're on the
ground.

--
Paul Tomblin http://xcski.com/blogs/pt/
Usenet is a co-operative venture, backed by nasty people -
follow the standards.
-- Chris Rovers