Abstract: A method for the global acoustic positioning of the USBL or SBL type of a marine or submarine target is more accurate than the method used by known USBL or SBL systems, while applying a network of sensors having the same material dimensions as those of these known systems. The method makes use of the movements of the network of sensors to apply principles of the processings by synthetic antenna. The principle of the synthetic antenna transposed to the present problem consists in using the signals received by the hydrophones of a physical antenna placed on a moveable platform at K different moments in succession, and therefore at K locations in succession in order to provide an estimate of the position of the beacon by virtue of an antenna of virtually greater dimensions.