What term should not be used when runway length available for departures has been temporarily shortened?

The term that should not be used when referring to a runway length available for departures that has been temporarily shortened is "full length." This terminology implies that the entire length of the runway is available for use, which can be misleading and potentially dangerous if the runway has been obstructed or its usable length has been reduced. It is crucial for safety that pilots are fully aware of the actual dimensions available for takeoff, and using "full length" in this context could lead to misunderstandings and operational hazards.

Other terms like "cleared," "authorized," and "proceed" can be relevant in air traffic control communication, as they typically refer to the approval for an aircraft to take off or continue its movements without implying anything about runway length. Thus, it's essential to use accurate language that reflects the actual conditions of the runway to ensure clarity and safety in operations.