Which device provides the autotune function of the navigation radios?

Which device provides the autotune function of the navigation radios?

• A. FMGC
• B. MCDU
• C. FD
• D. FMGS

Answer: (D)

Autotune of the navigation radios is handled by the Flight Management and Guidance System. The FMGS uses the active flight plan and approach data to determine which VOR/LOC/ILS frequencies are needed and automatically tunes the NAV radios accordingly, keeping the aircraft on the intended route without manual frequency changes. The MCDU is just the user interface to input data into the FMS; the Flight Director provides guidance cues, but neither performs the automatic radio tuning. The FMGCs are part of the FMGS, but the tuning function specifically resides within the FMGS to coordinate nav radio selection with the current route.

Autotune of the navigation radios is handled by the Flight Management and Guidance System. The FMGS uses the active flight plan and approach data to determine which VOR/LOC/ILS frequencies are needed and automatically tunes the NAV radios accordingly, keeping the aircraft on the intended route without manual frequency changes. The MCDU is just the user interface to input data into the FMS; the Flight Director provides guidance cues, but neither performs the automatic radio tuning. The FMGCs are part of the FMGS, but the tuning function specifically resides within the FMGS to coordinate nav radio selection with the current route.