Thank you very much for the numbers. The "facility" has been there for many many years, and I have PAXed over it many many times on my way between Perth and the Pilbara. Nary a twitch in the BAE 146.
Elsewhere I've given up on conspiracy theorists. The 9/11 conspiracy inverted triangle relies entirely on the twin towers being "aircraft-proof". So far, no-one has been able to provide specific information about the particular "aircraft-proof" engineering details. That doesn't stop the chatter. The stupid being lead by the wilfully ignorant...