FlightAware Discussions

Puzzelled can you help


#1

Hi all, I am wondering if I can get some ideas as to why a Military flight that I saw with my own eyes and on looking at my adsb was not showing it, I relise that milatary flights are not generally posted, the aircraft I saw as a apatche helicopter I have seen some milatary flights over Scotland, hence the question is it a setting on my account or is this just the norm…
Thank you in advance
Derek G1GDB


#2

Need MLAT - https://flightaware.com/adsb/mlat/


#3

hi mlat is synced with 169 stations


#4

Two main possibilities:

  1. He had switched off ads b.
  2. He was at too low an altitude to be seen by the required number of MLAT stations.

#5

Not all military aircraft are even using Mode S which is required for MLAT. In theory we will see more military ADS-B adoption as we get closer to January 1, 2020 in the USA.