Interesting this one.
One of the basics of airmanship is situational awareness and the PIC is ultimately responsible for this in a given airspace.
However to recognise this and make an informed decision the PIC needs to have the necessary training in the first place.
So where does "whiteout" fit into this tragic accident?.
As an aside Ansett destroyed itself with it's strong unionism. It didn't need Air NZ's help!!.