During a straight-in approach, to what speed should you slow down once configured prior to starting your descent?

During a straight-in approach, it is critical to slow down to the final approach speed once you are configured for landing, which includes extending the landing gear and setting the flaps. The final approach speed is specifically calculated to ensure optimal aerodynamics and control during the last phase of the approach, providing a balance between lift and drag, which is essential for a stable descent.

Slowing to this speed enables you to maintain a safe margin above stall speed while still being responsive to any adjustments needed to correct your glide path. It allows you to precisely control your descent rate and airspeed, ensuring the aircraft remains stable as you prepare for landing.

The other speeds mentioned, such as climb speed, cruise speed, and landing speed, would not provide the appropriate characteristics needed during the final approach phase, either being too fast or unsuitable for the specific aerodynamic conditions required when aligning the aircraft for landing.