Abstract: A method to operate a system in support of air traffic control of an airport provides, automatically, to operators, in the same screen, status information for the systems required during low visibility operation, meteorological information and runway category of operation, making easier the operation of the controller and increasing airport security. The method comprises monitoring the status of all low visibility operation systems, calculation of a category more convenient for the operation of the airport runway, and degradation automatic (down grade) when it degrades a key system and upgrade or downgrade manually the category by operator decision. The method includes an architecture oriented for high availability with three blocks (Management, Input/Output and Visualization) and uses an application “alive” that performs automatic switching between servers, in case of failure or malfunction of one of them, increasing the availability of the system.