Which of the following defines the term "out-of-control flight" (OCF) as outlined in the guide?

The term "out-of-control flight" (OCF) is defined by a situation where there is no immediate response to flight controls. This scenario indicates a critical condition where the pilot is unable to regain control of the aircraft, which can lead to dangerous flight dynamics. In OCF, the aircraft may enter a state where it is unable to respond as expected to the pilot's commands, resulting in a potentially hazardous situation that could lead to a stall, spin, or other uncontrollable flight maneuvers.

Understanding this definition is essential for pilots and flight personnel to recognize the signs and take appropriate action should they find themselves in such an emergency. It emphasizes the importance of controlling the aircraft through its flight envelope and having an awareness of the aircraft's current performance status.

The other options describe different flight conditions but do not encompass the full scope of what constitutes an OCF. For instance, uncommanded climbs or uncontrollable airspeed may indicate a multitude of issues, but they do not specifically define the lack of response to controls that characterizes out-of-control flight. Similarly, failing to reach the required altitude can happen for various reasons, including poor performance or misjudgment, and is not indicative of an OCF situation.