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Old 08-16-2007, 08:52 PM
  #31  
cl601pilot
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Joined APC: Feb 2007
Position: Left
Posts: 393
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I've used both units. Our 421 came with the 90B and it was replaced with two 530w's. They are definately the way to go for that level of avionics. The WAAS upgrade has really made flying GPS approaches nice and easy.
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