Difference between CAT 1, 2, 3

Title says it all. I bielieve CAT 3 is full autoland but what is CAT 1, 2?

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All Autolands are “full autolands”.
The differences between the CATs (categories) are the different visibility and weather minimums.

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What do you mean CAT 3c will allow landings with 0 visibility… I thought we already have that right?

Nope, CAT IIIb requests at least 150 ft visibility.

I think CAT IIIc exist in some airport and I don’t think they allow it for safety reason. What’s the point of landing in zero visibility if you can’t see nothing front of you? How you gonna taxi and find your gate.

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Who’s gonna flash-light safety car? Another safety car? ;)

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All numbers in meters:

image

For a cat IIIB, after passing the approach ban, which is normally 1000 feet you can even land with 0 meters visibility as there is no minimum.

Interesting fact: imagine flying a cat IIIa approach with a DH of 50 feet; when you reach minimum and you don’t see have the necessary visual references you need to do a go-around but you might still touch down on the runway due to the momentum the airplane has. This does NOT mean you can cancel the go around and continue the landing.

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Cat IIIa DH = 50 feet.