Airbus: Cat III Single or Cat III Dual... what's the difference?
I believe that pilots flying Airbuses use Cat III Single (Autopilot1 engaged) while flying in good weather and visibility, but Cat III Dual (Autopilot1 & 2 engaged) is deployed only in poor weather and visibility conditions. I read somewhere that deploying both autopilots on an Airbus engages 'Autoland'. What exactly is Autoland and how does a Cat III Single approach differ from a Cat III Dual approach? Any Airbus pilots here?