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Updated: October 4, 2026
But before the ground computer could be programmed it had been necessary for an officer of the navigation section to prepare a written worksheet containing all the waypoints and their respective latitude and longitude co-ordinates which then were transcribed from the worksheet.
He said in evidence before the Royal Commission that when he went on to take from his written worksheet the longitude co-ordinates of the McMurdo waypoint he mistakenly transcribed the correct figures of 166° 48' as 164° 48' by inadvertently typing the figure "4" twice.
Accordingly Mr Brown of the navigation section wrote into his worksheet a corrected position of 77° 52.7' S and 166° 58' E and entered those figures into the system on 16th November. But the amendment was not made in the live flight planning system until the early hours of 28th November.