Which radio equipment is capable of providing horizontal guidance before and after landing?

Which radio equipment is capable of providing horizontal guidance before and after landing?

• A. Instrument Landing System (ILS)
• B. Horizontal Situation Indicator (HSI)
• C. VHF Omnidirectional Range (VOR)
• D. Automatic Direction Finder (ADF)

Answer: (A)

The Instrument Landing System is designed to give precise horizontal guidance to the runway centerline as you approach and land. Its localizer antenna transmits a signal that the aircraft’s receiver converts into a left–right deviation indicator, letting you fly a centered path to the runway. When paired with the glideslope, you also get vertical guidance for the descent, making it a true precision approach system. Other options provide navigation information (VOR for general lateral guidance, ADF to a beacon, HSI as a display of navigation data), but none offer the dedicated runway-centered lateral guidance used for approach and landing like the ILS does.

The Instrument Landing System is designed to give precise horizontal guidance to the runway centerline as you approach and land. Its localizer antenna transmits a signal that the aircraft’s receiver converts into a left–right deviation indicator, letting you fly a centered path to the runway. When paired with the glideslope, you also get vertical guidance for the descent, making it a true precision approach system. Other options provide navigation information (VOR for general lateral guidance, ADF to a beacon, HSI as a display of navigation data), but none offer the dedicated runway-centered lateral guidance used for approach and landing like the ILS does.