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Thread: Why use other navaids when there is GPS?
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Old 8th June 2012 | 00:25
  #6 (permalink)  
ImbracableCrunk
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Joined: Oct 2006
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From: Ankh Morpork, DW
I have experienced two good reasons:
  1. North Korea (jamming)
  2. China (not WGS-84)
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