I was looking at Phoenix AZ on the low altitude en-route chart, and there
is a cluster of GPS waypoints charted all around the VOR (in the Class B).
I assume those are for GPS instrument approaches. Is there a reason why
those are charted on the en-route?

--
Paul Tomblin http://xcski.com/blogs/pt/
I think I'd like to see a Simpsons episode starting up with Bart Simpson
writing 'I will not attempt to undermine the Usenet Cabal'.
-- J. D. Falk