Which aviation system updates a pilot on whether to adjust their glide path during an approach?

The instrument landing system (ILS) is designed specifically to assist pilots during the final stages of an approach to an airport. It provides precise guidance on the aircraft's vertical and horizontal position relative to the runway. The ILS uses both localizer and glideslope components to give pilots accurate information about their glide path.

The localizer provides horizontal guidance, ensuring the aircraft is aligned with the centerline of the runway, while the glideslope component supplies vertical guidance, indicating whether the aircraft is too high, too low, or on the correct glide path for landing. This information allows pilots to make necessary adjustments to their descent rate and approach angle, ensuring a safe landing.

In contrast, while the other systems mentioned – such as the airspeed management system, flight management system, and automatic pilot system – play important roles in overall flight management and control, they do not specifically provide the critical glide path information that the ILS offers during an approach. The ILS is the dedicated system that specifically informs pilots about glide path adjustments.