Roy Smith wrote:
..

Is there anything I'm supposed to do with the "WAAS CH 90502 W09A"
information? Are there receivers which require you to tune the WAAS
corrections in manually? I've always assumed that a WAAS-equipped GPS
would just do that automatically.

The 480 does. I'm sure the 430-W will as well. I suspect this is
one of those things like the TACAN channel numbers put in there for
"other" users.