rjtjrt
You are correct. Doh. Note to one self don’t post on Prune after a few glasses of Chardonnay. WAAS is also called SBAS.
LeadSled
To be honest I’m not sure either but there are rumblings from the airline industry worldwide about WAAS/SBAS and their preference for GBAS. It may be a case they don’t want to pay for a system outside their field of operation, i.e. that benefits all, or it may be a case one system isn’t compatible with the other.