I am trying to fly a DME arc. I have my NAV1 set to the ILS freq. and my NAV2 on the VOR/DME. So how do I get the DME equipment to read from the NAV2 instead of the NAV1 radio?

And I still don't have instrument back lighting on the 2D panel, only the panel itself . I have v1.1

Thanks in advance.

I think the NAV2 DME equip is slated for a SP2 release....thought I read this before.  As far your ARC....your gonna have to do it the old fashioned way  switch the freq right after you pass your lead in radial.....I've already done it on another approach...isn't to bad.  Happy landings 

Brian Thibodeaux
T546/T700 Propulsion Journeyman
C-130E/H2 Flt Eng

Actually...your theory is a bit flawed...all ARC's require a certain DME from the station...otherwise it wouldn't look like a arc 

There are a whole munch of techniques to flying a arc...I won't get into mine, it has worked out since I've started flying IFR a few years back.  But I'll give out a couple hints....
1. Maintain a constant airspeed until your at the lead radial and turning inbound
2. Be very proactive about maintaining the proper DME...don't let it slip and figure its only a little bit of a fudge factor...ARC's can get very complicated very fast.
3. Enter the ARC at the proper distance... .5-1 mile out should be good enough to start your turn onto the arc with about any aircraft.

Have fun 

Brian Thibodeaux
T546/T700 Propulsion Journeyman
C-130E/H2 Flt Eng

You can find your distance readout for Nav 1 at the top left-hand side of the HSI, below it I below its reads MILES....pretty sure thats what is says under it....for Nav2 there is no DME readout....if you want to do a ARC utilizing the Nav 2, you'll have to use the RMI, and have the GPS window open...plug in the IDENT for the navaid and use the GPS as your DME instrument....only other way I know how.

Hope that helps...

Brian Thibodeaux 
T546/T700 Propulsion Journeyman 
C-130E/H2 Flt Eng

Hello,

It is actually a bit more complicated in the real aircraft.
DME in the Hercules (at least the ones HAF flies) is obtained by tuning the TACAN (TACtical Air Navigation) transceiver to the channel that corresponds to the VOR/ILS frequency we need. So, you can have VOR1 set to VOR ABC and get the DME from VOR XYZ. To complicate things more, DME on the pilot side will always be driven by TACAN#1 and on the CP side by TACAN#2. There is no way to get a "cross side" DME. NAV gets both on a dedicated DME display.

You should be able to fly the arc with VOR1 set to the VOR and switch to the ILS freq as soon as you cross the lead radial as already suggested before.
Regards,

Spiros Hazapis
Athens, Greece