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Old 10th September 2010 | 14:12
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BOAC
Per Ardua ad Astraeus
 
Joined: Mar 2000
Posts: 18,575
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From: UK
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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