Sir,
"Well, if two competent crew were doing their job in an efficient and competant manner and one, you say, was flying the aircraft rather than both heads in the cockpit worrying about some unproven problem, who was not competant at DR nav and who was not looking out of the window?"
Again the clue is in the if, but I guess you knew that already.
"They certainly hit the hill.That is a fact." now that is an undeniable fact.