A system on an aircraft used during taxiing or air/ground and ground/air transitions. The system groups together a set of devices for mapping the airport zone presenting the crew with a set of elements catalogued in a database and/or updated as a function of information received dynamically. The system group has control or monitoring of compliance with regulations and other mobile craft, consolidating the airport topological information, the ground control instructions and the applicable operational rules. The system groups have routing, that is preparation of the taxiing phase during an arrival or preparation for takeoff, by depicting the interactions with the ground control for receiving the taxiing instructions, and from the aircraft to the ground control to inform the same of the aircraft capabilities. The system groups have guidance in the form of instructions presented to the crew, and of automatic speed management capabilities, for managing emergency situations.