A hydrocarbon transfer system includes a first structure carrying an articulated arm, having at a free end a first connector part, and a vessel having a second connector part, each connector part including a coupling member. Sequentially, during data transmissionreception, whether or not a transmission signal has been transmitted from an external device is detected, and it a transmission signal is detected the transmissionreception unit receiving said signal is used for data transmissionreception via optical communications with an external device. A network server constructs an SIA chat message and delivers it to the mobile client.