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On a Jeppesen SID chart, the climb gradient is not standard, because it's greater than 3.3%. What specifically does the ATS (7.4%) climb gradient mean?

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Above is the same SID, but from the official chart (aerocivil.gov.co).

ATS means Air Traffic Services. That climb gradient is what the ATS requires. Versus PDG (procedure design gradients), the minimum to clear obstacles.


From the Colombian AIP GEN 2.2 Abbreviations used in AIS publications:

  • PDG = Gradiente del procedimiento de diseño
  • ATS = Servicio de tránsito aéreo
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