NAV Radio Selection and Activation
The active and standby NAV frequencies are display on the CNS Bar at the top of the PFD/MFD.
The three selectable navigation modes are:
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VOR1 (or LOC1) - If VOR1 (or LOC1) is selected, a green single line CDI is displayed on the HSI with the corresponding identifier displayed inside the navigation indicator button.
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VOR2 (or LOC2) - If VOR2 (or LOC2) is selected, a green double line CDI is displayed on the HSI with the corresponding identifier displayed inside the navigation indicator button.
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FMS - If FMS is selected, a magenta single line CDI is displayed on the HSI with the current Route Navigation Performance (RNP) distance displayed inside the navigation indicator button.
For more information on Course Deviation Indicators and DME/Bearing Information windows refer to the HSI discussion in the Flight Instruments section. For more information on system navigation refer to the Flight Management Section.
Navigation radios are selected for listening through the NAV 'Standby' Window after touching the ID Annunciation Button and can be heard over the headset and the speaker if selected.