I am having trouble understanding the concept of Departure End of Runway. Most sources state that DER is at the end of the portion of the runway that can be used for takeoff (which, as far as I can tell, excludes the threshold at the end of the runway). But from the official FAA's Aeronautical Information Manual one can clearly see that DER starts at the "utmost" end of the runway (including threshold). Many other sources seem to support this, like this picture. Could someone point me to the right direction?

  • $\begingroup$ I always understood it to be the „opposite end“ of where you start the takeoff run, i.e. the very first point of the opposite runway... standing by to learn something here! $\endgroup$ – Cpt Reynolds May 23 '18 at 21:46
  • $\begingroup$ I'm not sure what context it's being used in, but would expect it does not include the RESA. For more info refer to this question $\endgroup$ – TomMcW May 24 '18 at 0:32

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