That´s what you can fly when you have the Instrument rating: Your minimum is 550m RVR (Runway visulal range) and a descision hight of 200 feet above ground.
You need a special training and a special aircraft.
The aircraft has to have two different flight guidance systems, one autopilot, at least one operative radar altimeter. And some other small things. The approach has to be made with the autopilot. In our company and in many or almost all we have a procedure what is called "monitored approach" That means, the copilot is flying the airplane to the minimum Actually he only monitors the airplane, cause the autopilot is flying. In his mind the copilot is not landing, he always things on the mist approach procedure. And when reaching the minimum the pilot calls minimum and when the captain doesn´t say anything or when he say´s go around, the copilot is initiating the missed approach procedure.
The captain is looking outside all the time during the approach so that his eyes get used to the light . And the copilot looks inside to fly.
The minimum for a CATII approach is 350m RVR and 100 feet decision height.
At minimum when the captain has the approach lights in sight he calls "my controls" and lands the airplane. The copilot stays with his eyes on the Instruments and calls out any deviations.
There are CATIII a, b and c approaches! CATIIIa means that the airplane has to have the equipment wich I have described for CATII plus a autothrottle system and an auto landing system.
The minimum is 200m RVR and 50 feet dh.
CATIIIb is the same as CATII and CATIIIa plus automatic stopping system, that means that the airplane controlles itself down to taxi speed. The minimum is 100m RVR and 0 feet dh. Thats the lowest minimum wich is allowed. CATIIIc would be possible, but it´s not allowed. The requirement for CATIIIc is the same as for the others plus automatic taxiing and automatic dogging on the gate. The minimum for this would be 0 m RVR and 0 feet dh. This category of approach is not allowed because with 0 meter RVR you the rescue troup couldn´t see anything in case something would happen.
I could give your more details about anything for example: The 777 is certiefied for CATIIIb approaches in single engine operation. I could give you a lot of detailes about certiefication requierments and other thing but that´s to much work because my AWO manual (All Weather Operation manual) has a few hundret pages.
But if you are interrested in somethin just let me know!
yes i can handle that alone. - - -famous last words