Brian 48Nav
If I recall correctly the Navigator on the VC10 decided to use a non standard Navigation technique for the crossing - ignoring the requirement for 2 navigators when using that technique which required maintaining a constant Magnetic Heading whilst adjusting the Variation to alter Course. He also neglected to inform the Aircraft Captain of his intentions.
Unfortunately, the Navigator applied the Variation changes the wrong way and the aircraft changed course to Starboard at the almost imperceptible rate of approx 2 degrees per minute.
When eventually located by US Air Defence Radar they were several hundred miles off course over Greenland heading roughly NNE - still turning right.
Last edited by cazatou; 5th Aug 2011 at 13:49.