When tuning ILS with the RMP, which statement is true?

When tuning ILS with the RMP, which statement is true?

• A. Only one ILS radio is tuned
• B. Both ILS radios are tuned to the selected frequency and course.
• C. No ILS radios are tuned
• D. The ILS radios are tuned to different frequencies

Answer: (B)

Redundancy in the navigation system is why both ILS receivers are kept synchronized. When you tune an ILS on the RMP, both ILS receivers are loaded with the same frequency and the same course. This means either receiver can provide the localizer and glide slope data to the flight displays and flight guidance, so you have a reliable source for the approach regardless of which NAV radio is active. If only one radio were tuned, you’d lose backup capability; tuning the two radios to different frequencies would give you mismatched signals and no single, consistent ILS reference.

Redundancy in the navigation system is why both ILS receivers are kept synchronized. When you tune an ILS on the RMP, both ILS receivers are loaded with the same frequency and the same course. This means either receiver can provide the localizer and glide slope data to the flight displays and flight guidance, so you have a reliable source for the approach regardless of which NAV radio is active. If only one radio were tuned, you’d lose backup capability; tuning the two radios to different frequencies would give you mismatched signals and no single, consistent ILS reference.