Definition
The length of runway declared available and suitable for the ground run of an airplane taking off. TORA is one of the four declared distances published for a runway, measured from the start of the takeoff roll to a defined point on the runway surface where the takeoff run must be completed.
Plain English
The portion of the runway you are allowed to use for the rolling part of takeoff, from where you start moving to where the wheels must leave the ground.
Context Anchor
Seen in runway data, takeoff planning, and notices about runway closures or reduced runway length.
Derivation
The phrase is straightforward, but the word 'declared' is the key idea behind it. TORA is not simply the physical length of pavement — it is the length the airport authority has officially declared usable for takeoff after accounting for obstacles, displaced thresholds, and other limitations.
Why Pilots Care
It determines whether the runway is long enough for a safe takeoff given aircraft weight, temperature, and wind.
Intuition Check
“Available” does not mean any pavement you can see. Here it means the runway length officially declared usable for takeoff.
Example Sentence 1
Before departing the short field, the pilot checked the TORA published in the airport directory to confirm enough runway was available for the takeoff roll at the planned weight.
Example Sentence 2
A shorter TORA forced the crew to reduce fuel load to meet performance requirements.