The ILS on the HSI works perfectly every time. ADI needles seem to be linked
to the director circle in the HUD. Now... the ILS circle in the HUD - I`ve been
told that it works flawlessly :/
I`ve done crapload of carrier approaches from different setups, intercepting the ILS at various distances (within ILS range) and sometimes the small circle
was not where I would expect it to be. I was constantly comparing it to the
needles on HSI (not ADI). Well, wether it works properly or not... I use the
HSI and it gets me a "OK" 3 wire everytime (almost everytime ;))