The invention relates to a method for guiding a vehicle (Ve) provided with an off-board navigation system relative to an external navigation server (S). It consists in transmitting (A) from the positioning module of the vehicle (Ve) to the server (S) position coordinates of the vehicle, calculating (B) the initial latency time (T1) and the return latency time (T2) between the vehicle and server, estimating (C) the distances covered (X1, Y2) by the vehicle (Ve) during the initial latency time and the return latency time, correcting (D) the position coordinates of the vehicle at the current moment by the value of the covered distances (X1, X2) in order to generate corrected coordinates (XC, YC), and triggering (E) the transmission of a guidance command if the corrected data corresponds to a positioning of the vehicle (Ve) allowing an appropriate reaction of the user of the vehicle. Application in the industry of off-board guidance systems.