My point was that this is NOT the first time AGL has been used in airspace definitions.
Yes, I agree, circuit heights are always just that.
But the CTAF / MBZ defn's were straight out of the 'VFR Flight Guide' - pages 204, 205.
For illustrative purposes only - I don't have the full AIP to hand - but the point I was making is that vert. references AGL have been used before.
And, in this case was probably the better way to do it.......
Thanks Mr 'P'...
But CTA..??
Cheers.
Sorry Mr 'H';...don't get yr point re 'identity speculation'...