A computer-implemented method for generating synthetic training data for an artificial-intelligence machine, the method includes at least steps of: defining parameters for at least one approach scenario of an aircraft approaching a runway; using the parameters of the at least one scenario in a flight simulator to generate simulated flight data, the flight simulator being configured to simulate the aircraft in the phase of approach toward the runway and to simulate an associated automatic pilot; using the simulated flight data to generate a plurality of ground-truth images, the ground-truth images corresponding to various visibility conditions; and generating, from each ground-truth image, a plurality of simulated sensor images.