What is the purpose of an Instrument Landing System?

The purpose of an Instrument Landing System (ILS) is to provide precise guidance to pilots for landing, particularly during approach when visibility may be limited. It works by using radio signals and a combination of lateral guidance (localizer) and vertical guidance (glideslope) to direct the aircraft safely onto the runway. This system is crucial for ensuring that aircraft can land safely in various weather conditions, enhancing the overall safety of aviation operations.

Navigational assistance during runway approach is essential in helping pilots align with the runway and maintain the correct descent path, especially when visual references are obscured. The use of an ILS allows landings to take place even in reduced visibility, thereby increasing the efficiency and safety of flight operations.