Categories of ILS Approaches. I 200 feet 1800 feet With touchdown zone and runway centerline lighting . DH No RVR limitation Pray that your electronics and autopilot are reliable. Data from Aeronautical Information Manual, AIM . You'll notice that the Cat.
IIIc approach is a zero-zero approach.
The autopilot is in full control of the aircraft for any approach below Cat. And you can't initiate a Cat. II or Cat. III approach at just any airport simply because the weather minimums require it. Those approaches, like all the others, must be approved and published. I don't know whether that data includes statistics on the category of an ILS landing, but wouldn't it be interesting to know what percent of commercial-airliner landings are Cat.