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Old 14th Mar 2017, 14:00
  #23 (permalink)  
El Bunto
 
Join Date: Jul 2009
Location: NI
Posts: 1,012
There was ADS-B and it shows the aircraft crossing the country and crossing the Ballycroy hills at 3500 feet.
The CHC / ICG S92s are Mode-S only, the positions on FR24 / Planeplotter etc are MLAT guesstimates. At the time of introduciton there was no certified ADS-B transponder for the '92.

However they do broadcast GPS-derived position on AIS, which is not considered a safety-of-flight system.
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