I have never been so lucky as to fly a GIV but perhaps somebody could tell me..... Do you have to program everything via the FMS? Can't one simply tune up an NDB and an ILS frequency on an old fashioned control head?
I don't think anyone answered that specific question - I can't speak for the G-4 but in a lot of the bigger newer stuff all the nav radio selections can only be done via a "navrad page" on the FMC/S. The NDB freqs are entered numerically longhand, the ILS is entered by either typing in the LOC freq and QDM numerically or by selecting an arrival airport, and then runway and procedure on a "departures arrivals" page e.g. " ILS 26" . So in short (phew) in many types now there is no "old fashioned control head" - isn't progress wonderful?