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Old 24th August 2007 | 15:41
  #101 (permalink)  
BOAC
Per Ardua ad Astraeus
 
Joined: Mar 2000
Posts: 18,575
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From: UK
Same 'press to transmit' button/switch but selected via an audio selector panel. Have a look at http://www.b737.org.uk/ for 737 info.
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