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Old 11th Feb 2015, 20:51
  #11625 (permalink)  
Skyjob
 
Join Date: Jan 2000
Location: FL410
Posts: 837
A simple autonomous device, located in tail, transmitting position from a integrated GPS through Inmarsat each minute... Seems simple enough.
Fitted with internal batteries which could be charged only on ground from AC system, no link to flight deck required.
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