In terrain flight, which mode requires constant altitude management?

In terrain flight operations, the essential aspect of Low Level flight mode is the need for continuous altitude management. This mode typically involves flying at low altitudes where terrain features must be navigated around, necessitating fine adjustments to altitude to avoid obstacles and maintain a safe distance from the ground. Pilots must be diligent in monitoring their altitude, responding to changes in the terrain, and making immediate decisions to ascend or descend as necessary to enhance safety and maintain operational effectiveness.

While other modes such as Terrain Following do involve altitude considerations, they generally employ automated systems to adjust altitude in response to terrain changes. In contrast, the Low Level mode relies more heavily on the pilot's manual input and situational awareness for altitude management, making this mode particularly demanding in terms of altitude control. This emphasis on constant altitude management in Low Level operations is what distinguishes it from other flight modes.