"Airbus" wrote in message
...

"Upward from above" is the term used on the TAC.
In other words, (IIUC) it means you can operate at 1200 feet talkiing to
nobody, while ATC runs a heavy jet 1 foot over your head at 1201, where
CBAS
begins . . .


A bit more than a foot would be required. An altitude assigned by ATC
cannot be lower than the MVA.