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AIM 

6/17/21 

FIG 4

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Effects of a Geographical Constraint on a Runway’s Declared Distances 

NOTE

 

A runway’s RSA begins a set distance prior to the threshold and will extend a set distance beyond the end of the runway 
depending on the runway’s design criteria. If these required lengths cannot be achieved, the ASDA and/or LDA will be 
reduced as necessary to obtain the required lengths to the extent practicable. 

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Airport Operations