What does the Instrument Landing System (ILS) provide?

What does the Instrument Landing System (ILS) provide?

• A. A non-precision localizer-only path.
• B. A precision instrument landing system providing both vertical and horizontal guidance.
• C. Only visual cues for runway alignment.
• D. Ground-based radar guidance.

Answer: (B)

The Instrument Landing System provides precision guidance with both horizontal and vertical components, enabling an aircraft to align with the runway and descend along a safe glide path using instruments. The localizer delivers horizontal guidance to keep the aircraft on the runway centerline, while the glide slope delivers vertical guidance to the correct descent angle. This is a ground-based radio-navigation system that supports instrument approaches under adverse weather, unlike systems that offer only visual cues or rely on radar guidance.

The Instrument Landing System provides precision guidance with both horizontal and vertical components, enabling an aircraft to align with the runway and descend along a safe glide path using instruments. The localizer delivers horizontal guidance to keep the aircraft on the runway centerline, while the glide slope delivers vertical guidance to the correct descent angle. This is a ground-based radio-navigation system that supports instrument approaches under adverse weather, unlike systems that offer only visual cues or rely on radar guidance.