A method for adjusting a radiation direction of an optical communication signal between a communication platform and a remote station includes: starting from an initial position of a beam deflection unit of the platform for steering the optical communication signal, adopting deflection positions of the beam deflection unit along two different lines of movement and in opposite directions along the lines of movement, the deflection positions being consistent with deflection angles having the same absolute value, each deflection position being held for a different period; measuring an intensity of the signal at the station; when an intensity change in the signal is discovered at the station, ascertaining a signal quality change in the signal and recording the duration of this intensity change; determining that intensity change that pertains to the best signal quality change, and the associated duration; changing the intensity of a guidance beam for the duration previously determined.