"Matt Barrow" wrote in message
...

Well knock me over with a feather!!

Above 18,000 feet, where the separation is 1000 feet and AFAIK, VFR
operations are definitely NOT allowed? The example given was 33,500
feet...RVSM air space.

Could you 'splain that one?


Block altitude. "Maintain block FL 330 through FL 350". You can operate at
any altitude within that block and have vertical separation from traffic at
FL 320 and FL 360.