Which components are part of the ILS system?

The ILS (Instrument Landing System) is a critical component of modern aviation, providing pilots with precise guidance during the landing approach. The key components of an ILS system include the Localizer, which provides lateral guidance to the runway centerline, and the Glideslope, which offers vertical guidance during the descent. The RSDU (Receiver Signal Distribution Unit) plays a vital role in processing signals from these components and distributing them to the cockpit display.

The Localizer and Glideslope work together to ensure that aircraft can approach and land on the runway safely, especially in poor visibility conditions. These components are specifically designed to support instrument approaches, differing from systems like DME (Distance Measuring Equipment) and GPS (Global Positioning System), which serve broader navigational purposes.

Consequently, while other choices may mention useful navigational tools, the combination of Localizer, Glideslope, and RSDU distinctly characterizes the functionality and purpose of the ILS system.