"Mike Rapoport" wrote in news:HZrFe.8543$dU3.6278
@newsread2.news.pas.earthlink.net:

My understanding is that WAAS has an integrety function and is able to
detect an inaccurate signal.

RAIM (Receiver Autonomous Integrity Monitoring) is available without WAAS,
and was available before WAAS was implemented.

--
Regards,

Stan

"They that can give up essential liberty to obtain a little temporary
safety deserve neither liberty nor safety." B. Franklin