I'm just wondering if he meant 10 to 1500 feet or 10,000 to 15,000 feet? If its the former that would explain not cat A, if it's the latter then I'll post again when I've finished shrieking with hysterical laughter.
Cheers,
N
(However, in fairness, Alan M has at least pointed to how you should go about it, whatever you want)
"Keep smiling, it makes people wonder what you're up to..."