The present disclosure relates to an avoidance system which comprises means for determining, from at least the value of a parameter for the movement (R, Vr) of an intercepting vehicle relative to said moving body and from the incoming direction (θo, φo) of said vehicle relative to said moving body, an order of avoidance intended for said automatic means of piloting said moving body in such a way that the latter automatically carries out a maneuver for avoiding said vehicle.