Quote:
Originally Posted by Philip Argy
Thanks, Mick - that's the missing piece of information/explanation that I needed.
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http://en.wikipedia.org/wiki/Instrum...ILS_categories tells you about the categories of ILS.
As stated at the moment all Oz ILS are Cat I - there is considerable expense in maintaining ILSs at higher categories than you "need"
Additionally in Sydney, being so close to the city, the amount of RFI (radio frequency interference) is an issue, keeping the ILS at the current level seems to be hard enough!
Avalon on the other hand would be OK :-)