Final answer:
On the final approach, pilots must maintain a fixed approach speed to ensure optimal lift and control while also keeping a steady descent rate and glide path angle.
Step-by-step explanation:
During a final approach for landing, pilots are expected to maintain a set of fixed values to ensure a safe and stable descent to the runway. One of these values that must be maintained is the approach speed. This is the speed necessary to obtain optimal lift and control of the aircraft while descending at a proper glide slope.
The approach speed is characteristic of each aircraft type and depends on various factors such as aircraft weight and configuration.
Additionally, the pilot must keep a steady descent rate and glide path angle, usually guided by visual or instrument references such as the PAPI (Precision Approach Path Indicator) or ILS (Instrument Landing System) to ensure the aircraft is aligned both laterally and vertically with the runway.
These fixed values are critical for ensuring that the landing is conducted smoothly and safely.