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Old 4th August 2010 | 18:49
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UAV689
 
Joined: Sep 2005
Posts: 25
Likes: 1
From: UK, Paris, Peckham, New York
It's defo latitude, that is a constant heading, long is a great circle, which requires constant calculations to fly and has only been able to be done fairly recently (if my atpl memory is correct!).
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