I understand that left nav radio is NAV1 on captain side and right radio is NAV2 on F/O side.
ILS must be manually selected and VOR is automatically selected on those same NAV radio ?
There are no switch MAN/AUTO on IXEG 737-300 VHF radio, can somebody explain me how FMC/CDU can use those radios for VOR's navigation as well as pilot for ILS tuning without MAN/AUTO switch ?