What is one of the key steps in transitioning from cruise to approach mode?

In transitioning from cruise to approach mode, descending to the assigned altitude for landing is a crucial step. This phase involves reducing altitude to ensure that the aircraft is at the appropriate height for the final stages of the landing process. Descending to the assigned altitude allows the pilot to establish a stable approach path and align with the runway for a successful landing.

This step is closely tied to the approach configuration of the aircraft and the specific protocols for landing. Proper descent ensures that you will not only reach the correct altitude on time but also allows for adjustments to the flight path based on air traffic control instructions and environmental factors. By accurately managing the descent, pilots can ensure that they are prepared for landing, optimizing safety and efficiency.

The other options would not contribute effectively to a successful transition into landing mode as they either do not align with standard operational procedures or do not help in achieving the appropriate approach conditions.