VHF radio always on auto ?

[JeanClaude]

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 ?

[frumpy]

You tune in VOR manually, as far as I know the CDU does not allow interaction with VOR frequencies.

Some later 737 models have the MAN/AUTO switch and I believe they allow tuning this in the CDU if you want.

It's just like in an old Cessna, you tune in the frequency on the radio panel and off you go.

[JeanClaude]

If i understand well, when CDU tune VOR's , the frequency dont show up on NAV radios but if i fly manually from VOR to VOR then i can use Nav radios to do the job ?

I would love to read navigation chapter from FCOM of the IXEG 737 modelled but the one i have is for later models.

Thanks

JC

[frumpy]

Don't try to use the CDU for tuning frequencies, it can't do the job.

Use the turn knobs instead to select the NAV1/2 frequencies. This is not a NG!

 

[Eddie]

Don't try to use the CDU for tuning frequencies, it can't do the job.

Use the turn knobs instead to select the NAV1/2 frequencies. This is not a NG!

 

The FMC would have automatically tuned frequencies for DME/DME updating, at least in older variants. Don't think that's modeled here though.