How are most navigation systems set up in the civi world?
On the Pavehawk, software drives the integration of the various parts (INS,GPS,Doppler blend)so we have a self contained approach ability. Given a set of coords, I can define approach angle and whatnot, so that the indications in the cockpit look like an ILS but I can fly the approach to any point in space. Given how stingy the USAF is with providing money for helos, this can't really be super expensive. If pilot unions decided this was worth it, how hard to get would it really be?