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Old 20th January 2012 | 22:10
  #20 (permalink)  
BwatchGRUNT
 
Joined: Jun 2002
Posts: 75
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never seem them above 410/430, typically 410 negative RVSM so blocking three levels if you include 420!

U2's drop in to upper radar cover passing 470 out of 660 ish to land occasionaly
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