Can someone explain VOZ101's CHC-MEL routing today?

[David O.]

Normally I would think that it's more or less a direct route from CHC to MEL, but today I noticed it swing past SYD, extending the flight path and the flight time, around 3 hours 20 mins up to 4 hours 30 mins.
Can someone explain why they'd do this flightpath? My first thought was weather, but don't see anything out of the ordinary.

[JamesL]

I would say U/S APU, it's a requirement for EDTO120 ops.