Centaurus.....your point is noted and valid...no argument here and the 500/1000 ft calls for most operators are BA......we used to use these also .......but as I also noted....
we use RA as this is specific to "our" operations and the airports "we" fly into ......mostly for "our" CAT 3 operations......unless the app says
"RA NOT AUTHORIZED" for "our" ops.....then we use BA for "our" ops
(wished I,d never said RA now.....sort of screwed the point Iwas trying to make...fu
)