Hi Axel, precision instrument approaches aren't definitely my area of expertise, but I was discussing this with the Chief Pilot and we're wondering what FO stands for?

Hi Goncalo, FO is the short for Fail Operational and thats a (new) wording for CAT IIIB because the system behind the capability is fail operational (dual Autopilot, Autoland, Auotmatic Rollout guidance system)