A method of detecting a correct position and/or orientation of a secondary winding structure of a secondary unit relative to a primary winding structure of a primary unit of a system for inductive power transfer to a vehicle, wherein the vehicle includes the secondary unit for receiving an alternating electromagnetic field which is generated by the primary unit, wherein the vehicle includes at least a first transmitter for transmitting a first signal and a second transmitter for transmitting a second signal, wherein a wayside control unit includes at least one receiving means for receiving the first and the second signal, and wherein the correct position and/or orientation of the secondary winding structure of the secondary unit relative to the primary winding structure of the primary unit is detected depending on the first and the second signal.