Aussie airlines should get with the times and always carry an alternate
Even if you tried to legislate that the airline lobby would have it shot down as the expense in the fuel carried every day would have them up in arms.
Additional to that is even with an alternate if the unpredictability of weather or poor forecasting models are the real issue then holding an alternate may not help you as the Mildura incident proved. Two airliners both holding an alternate got caught out at both the destination and the alternate.
The real answer to this problem is to start building CAT II/III ILS's
like the rest of the developed world
But that would mean actually investing money in aviation Australia think its smarter to spend $200 Billion tearing up farmland on a train line
