A carriage comprising: - at least one motorised wheel , - at least one microcontroller for controlling a motor of said at least one motorised wheel , - a central unit for processing data and for generating control data and transmitting them to said at least one microcontroller , and - a receiver beacon for transmitting the data to said central unit , the carriage further comprising a first emitter beacon configured to emit at least one first radiofrequency signal , and a second emitter beacon configured to emit at least one second radiofrequency signal , the at least one first radiofrequency signal and the at least one second radiofrequency signal being emitted to a remote transceiver beacon of the carriage, and the receiver beacon being configured to receive at least one third radiofrequency signal coming from the remote transceiver beacon of the carriage , the at least one third radiofrequency signal comprising a datum dependent on said at least one first radiofrequency signal and on said at least one second radiofrequency signal emitted by the first and second emitter beacons , in order to transmit to the central unit at least one datum depending on said at least one third received radio frequency signal , wherein the dependent datum comprises a first indication of power of said at least one first radio frequency signal and a second indication of power of said at least one second radio frequency signal , the carriage being characterised in that it further comprises a terminal integrating the receiver beacon , said terminal comprising at least one storage medium storing an algorithm configured to determine the relative position of the carriage relative to the transceiver beacon based on the first and second power indications, and on a third power indication of said at least one third radiofrequency signal received by the receiver beacon of the terminal . - at least one motorised wheel , - at least one microcontroller for controlling a motor of said at least one motorised wheel , - a central unit for processing data and for generating control data and transmitting them to said at least one microcontroller , and - a receiver beacon for transmitting the data to said central unit , the carriage further comprising a first emitter beacon configured to emit at least one first radiofrequency signal , and a second emitter beacon configured to emit at least one second radiofrequency signal , the at least one first radiofrequency signal and the at least one second radiofrequency signal being emitted to a remote transceiver beacon of the carriage, and the receiver beacon being configured to receive at least one third radiofrequency signal coming from the remote transceiver beacon of the carriage , the at least one third radiofrequency signal comprising a datum dependent on said at least one first radiofrequency signal and on said at least one second radiofrequency signal emitted by the first and second emitter beacons , in order to transmit to the central unit at least one datum depending on said at least one third received radio frequency signal , wherein the dependent datum comprises a first indication of power of said at least one first radio frequency signal and a second indication of power of said at least one second radio frequency signal , the carriage being characterised in that it further comprises a terminal integrating the receiver beacon , said terminal comprising at least one storage medium storing an algorithm configured to determine the relative position of the carriage relative to the transceiver beacon based on the first and second power indications, and on a third power indication of said at least one third radiofrequency signal received by the receiver beacon of the terminal . <EOS>