Half a croissant, on a plate, with a sign in front of it saying '50c'
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Astro Navigation

Uses the stars to Navigate
 
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Instead of using GPS use optical sensors and Artificial intelligence to guide a craft using the stars. It has no real advantage unless the GPS is shot down, but still its an idea.
SIVOLC, Jul 12 2004

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       " Captain, the clouds are up and the Nav-system has gone down again "
normzone, Jul 12 2004
  

       the only craft that have the stars reliably in sight - satellites - already use that.
loonquawl, May 28 2009
  

       i find the best navigation to be other people. apart from in france
undecided888, May 28 2009
  
      
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