What system provides the required navigation input for autopilot during CAT II and greater approaches?

What system provides the required navigation input for autopilot during CAT II and greater approaches?

• A. VOR system
• B. ILS
• C. GPS
• D. ADC

Answer: (B)

The Instrument Landing System (ILS) is the correct answer because it is specifically designed to provide precise lateral and vertical guidance during approaches, particularly for Category II (CAT II) and Category III (CAT III) operations in aviation. The ILS transmits radio signals that enable the aircraft's autopilot system to follow a defined glide path and localizer course to the runway, especially in low visibility conditions. This high level of accuracy and reliability makes ILS the preferred system for these types of precision approaches. While other systems like GPS also serve as navigation aids, they do not inherently provide the same level of precision required for CAT II and CAT III approaches as ILS does. The VOR (VHF Omnidirectional Range) system provides directional guidance but lacks the precision needed for such low-visibility landings. The Air Data Computer (ADC) gathers and processes air data information but does not provide navigation guidance in the context of ILS approaches. Therefore, ILS is the system that meets the specific requirements for autopilot navigation during CAT II and greater approaches.

The Instrument Landing System (ILS) is the correct answer because it is specifically designed to provide precise lateral and vertical guidance during approaches, particularly for Category II (CAT II) and Category III (CAT III) operations in aviation. The ILS transmits radio signals that enable the aircraft's autopilot system to follow a defined glide path and localizer course to the runway, especially in low visibility conditions. This high level of accuracy and reliability makes ILS the preferred system for these types of precision approaches.

While other systems like GPS also serve as navigation aids, they do not inherently provide the same level of precision required for CAT II and CAT III approaches as ILS does. The VOR (VHF Omnidirectional Range) system provides directional guidance but lacks the precision needed for such low-visibility landings. The Air Data Computer (ADC) gathers and processes air data information but does not provide navigation guidance in the context of ILS approaches. Therefore, ILS is the system that meets the specific requirements for autopilot navigation during CAT II and greater approaches.