Capt Simpson: "And then on the day of the flight after inserting all the waypoints for our flight into the navigation computers, I then selected pertinent ones, and related them to the charts namely the Auckland Islands, Ballenys, Hallett, and my McMurdo position, Cape Campbell, just to make sure that the latitudes and longitudes on my flight plan were in fact going to take us to those points." (The Erebus Papers p682)
If Capt Collins had done the same thing for just one of those waypoints, the accident would not have happened.