Old 2nd Feb 2019, 20:48
  #965 (permalink)  
ATC Watcher
Pegase Driver
 
Join Date: May 1997
Location: Europe
Age: 69
Posts: 2,609
DaveReidUK, no, if it was equipped with Mode S alone ( so ADS-B) you can determine pretty accurately the location as you can deduct/calculate ground speed and rate of descend pretty accurately ( 25ft increments) that is want I meant.
Now whether r it had one or not, a PLN is just telling us what the pilot filed. not what actually is in the aircraft..
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