What does TORA stand for in aviation terms?

TORA stands for "Take-off Runway Available," which defines the length of runway that is available for the takeoff run of an aircraft. This measurement is critical for pilots and flight planners because it directly affects the performance calculations needed for a safe takeoff. The TORA takes into consideration the physical length of the runway and any obstacles or limitations that may reduce the usable length for takeoff.

Understanding TORA is fundamental in ensuring that an aircraft can safely become airborne without exceeding the available runway length, which is crucial for meeting regulatory safety standards. The other terms presented in the choices do not accurately reflect standard aviation terminology or concepts related to runway use and performance calculations.