What functions are provided by ILS?

The Instrument Landing System (ILS) is designed to provide precise guidance to aircraft during the approach and landing phases. The correct choice highlights that ILS offers guidance, which is critical for pilots as they navigate while descending towards the runway. This guidance consists of lateral and vertical information, ensuring that the aircraft remains on the correct flight path.

Range involves the measurement of the distance to the runway or the decision height, which can be crucial for assessing when to make landing decisions. Visual information is also an integral part of ILS, as it includes the glide slope indicator and localizer, which help pilots visually confirm their alignment with the runway and the proper descent angle.

By focusing on these three aspects—guidance, range, and visual information—this choice accurately encapsulates the functions that ILS provides to enhance safety and precision during landings.