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Can You Explain The Connection Between Declared Distances Found In The Airport/facility Directory And Shortened Runways?

Answer»
  • If the runway is shortened, then EXPECT to see at least one CHANGE in the declared distances: accelerate-stop distance available (ASDA), landing distance available (LDA), takeoff distance available (TODA), and takeoff runway available (TORA)
  • If a shortened runway CLOSES part of the displaced threshold, the LDA may not change while every other declared distance might change
  • BARRICADES ACROSS part of the runway ensures the runway safety area (RSA) is further along the runway – the RSA boundary is where the measurements start



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