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Old 7th August 2011 | 14:33
  #15 (permalink)  
FlyingStone
 
Joined: Apr 2010
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From: IRS NAV ONLY
Just to add to Whopity's post, the 5NM (or 8km) is the distance from aircraft's estimated position (at least according ICAO Annex 2), so actual navigation performance is taken into account.
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