declared distances

declared distances

declared distancesclick for a larger image
The distances calculated and published for each runway direction of an airport based on aircraft characteristics, safety requirements, and the airport environment. The declared distances pertain to takeoff run available (TORA), takeoff distance available (TODA), accelerate-stop distance available (ASDA), and landing distance available (LDA). TORA is the length of runway declared available and suitable for a ground run of an airplane. TODA is the length of the takeoff run available plus the length of the clearway, if provided. ASDA is the length of the takeoff run available plus the length of the stop-way, if provided. LDA is the length of runway declared available and suitable for the ground run for an airplane landing.
References in periodicals archive ?
It is intended to make pilots aware that runway declared distances are available for the airport, and are located in the Airport/Facility Directory.
The declared distances are a set of four distances computed according to FAA design standards to indicate the distance suitable for meeting various aircraft performance requirements by accounting for the length of features such as displaced thresholds, stopways, clearways, and other safety zones.
Declared distance information is primarily of interest to pilots of turbine aircraft for use in performance planning, but it is certainly of interest to all pilots to know exactly how much runway is available.