What does the ILS provide?

What does the ILS provide?

• A. A weather data feed for en-route flights
• B. An approach path for exact alignment and descent of an aircraft on final approach to a runway
• C. A communications channel with air traffic control
• D. A system for determining in-flight altitude

Answer: (B)

The Instrument Landing System provides precise guidance for the final approach, allowing an aircraft to stay on the runway centerline and descend along a defined glide path to the threshold. It uses two main parts: a localizer for horizontal alignment and a glideslope for vertical descent, enabling a stable, exact approach even in low visibility. It isn’t a weather data feed, a means of communicating with ATC, or a system that determines altitude—those functions come from separate systems. So the ILS delivers the precise approach path necessary for alignment and controlled descent to the runway.

The Instrument Landing System provides precise guidance for the final approach, allowing an aircraft to stay on the runway centerline and descend along a defined glide path to the threshold. It uses two main parts: a localizer for horizontal alignment and a glideslope for vertical descent, enabling a stable, exact approach even in low visibility. It isn’t a weather data feed, a means of communicating with ATC, or a system that determines altitude—those functions come from separate systems. So the ILS delivers the precise approach path necessary for alignment and controlled descent to the runway.