To understand this complaint one needs a clear picture of what it was that the Commission found or alleged against the navigation section. When studying the report as a whole we have encountered difficulties in this regard, difficulties not altogether removed when we explored them during the argument with Mr Baragwanath. But our understanding is that in essence the Commissioner suggests that the original change of the southernmost point to one in the Sound, 25 miles west of McMurdo Station, was probably deliberate on the part of the navigation section (although he refrained from a definite finding) and that in November 1979 they deliberately made a major change back to the vicinity of McMurdo Station but deliberately set out to conceal the change from the American personnel there. The motive for the 1979 change ascribed by the Commissioner to the navigation section appears to be that they considered that the New Zealand Civil Aviation Division had only approved a route over Mount Erebus, yet at the same time that the American 'authorities' would object to that route, regarding the route down the Sound as safer. In short the theory (if we understand it correctly) is that the navigation section were in a dilemma as there was no route approved by all concerned. Beyond argument, it would seem, there was slipshod work within the airline in the making of the change and the failure to expressly notify flight crews. But the allegations of deliberate concealment and a concocted story are another matter. The complaint is that they were never put squarely to the members of the navigation section. The Commissioner himself did put to the chief navigator, Mr Hewitt, that 'Someone may suggest before the inquiry is over' that the word 'McMurdo' was relayed to McMurdo to conceal a long-standing error in the co-ordinates. Mr Hewitt replied 'Certainly not, sir' and there, the applicants point out, the matter was left, without further questions to witnesses by anyone or any reference in counsel's final submissions. On the other hand Mr Baragwanath urged in substance that the witnesses from the navigation section must have understood that their evidence was under suspicion; that they had ample opportunities to explain how and why any mistakes occurred; and that it was for the Commissioner to assess their explanations, taking into account any impressions they made on him individually as witnesses. Captain Eden