In which phase of flight is soft altitude available in the FMGC?

The availability of soft altitude in the Flight Management and Guidance Computer (FMGC) primarily during the cruise phase is notable because this phase allows for the most stable and sustained flight operations. Soft altitude is a feature that allows the aircraft to maintain altitude with less stringent responses from the autopilot, allowing for smooth adjustments rather than abrupt changes.

During the climb phase, the aircraft is actively gaining altitude, which requires more precise control and management of vertical speed and performance. Similarly, in the descent phase, the focus is on managing descent rates and ensuring compliance with air traffic control. The go-around phase involves maneuvering to maintain a safe altitude and position, making soft altitude less applicable due to the necessity of rapid adjustments in flight path and altitude to safely navigate back to the desired pattern.

Thus, during the cruise phase, flight management systems can utilize soft altitude to enhance comfort and efficiency in maintaining the planned altitude, leading to a more pleasant flight experience while allowing the crew to manage other aspects of flight without constant focus on maintaining altitude adjustments.