What happens when glide slope tuning is paired with the localizer frequency?

When glide slope tuning is paired with the localizer frequency, it is automatically coordinated by the aircraft's navigation system. This automation is critical in precision approaches, as it ensures that the aircraft can accurately track both lateral and vertical guidance during its descent toward the runway. The localizer provides the horizontal guidance, while the glide slope offers the vertical guidance necessary for a safe approach to landing.

In modern avionics, pilots benefit from advancements that allow these frequencies to be linked together seamlessly, simplifying the process of setting up for an instrument approach. This automatic pairing reduces the risk of pilot error and enhances safety by ensuring that both signals are correctly aligned for optimal navigation.