Declared Runway Distance

Question 1

Landing Distance Available

Answer 1

LDA is the distance from the threshold to complete the approach, touchdown, and decelerate to a stop, plus safety factors.

Question 2

Takeoff Run Available (TORA)

Answer 2

TORA is the total length of runway available for an aircraft to accelerate from brake release to liftoff and half the horizontal distance to climb to 35 ft. It is effectively the actual length of the prepared surface runway that an aircraft can use for a takeoff roll.

Question 3

Accelerated Stop Distance Available (ASDA)

Answer 3

ASDA applies to a rejected takeoff. Accelerated-Stop Distance Available is the total length of runway available (which may include a stopway) to accelerate from brake release to V1 plus the distance required to safely abort or decelerate to a stop, plus safety factors.

Question 4

Takeoff Distance Available

Answer 4

TODA represents the entire distance that can be utilized for takeoff, including both the paved runway and any clearway beyond the runway.