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10th Sep 2010, 14:12

#2 (permalink)

BOAC

Per Ardua ad Astraeus

Join Date: Mar 2000

Location: UK

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I'm not sure you understand INS? Why would True North need updating? The north pole does not move. Do you mean how does the platform know where true north 'is'?

Answer - it is a 'giro'. Unlike blondes, you tell it once and it remembers

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