Really? As I understood it, QF took a different route entirely and from the computerisation of the route to the flight before the accident - which would have been for more than a year, remember - all ANZ flights would have followed the incorrect INS track down McMurdo Sound. How would a QF or ANZ pilot have been able to tell him what Erebus looked like on the weather radar when none of them had approached Erebus from that angle?
Would you not grant that if Erebus were visible from 100 miles south, it would certainly be visible closer? I don't know what route QF took, but the book "Whiteout" reported QF SLF mooning the McMurdo residents, so they passed close enough to Erebus.
It matters not much from which angle Erebus is approached, it would be either visible under the ice on the radar, or not. Nothing but another transport aircraft with that radar, like ANZ and QF flights, would provide the answer. Still, I have seen or heard nothing suggesting they even had the radar energized.
GB