ABSTRACT
This chapter examines the treatment of various factors of risk: the search for improvements in safety gives rise to innovations which, parting from a much evolved situation. The risk in commercial aviation has been classified in its generating factors but there have been many classifications carried out over time. The model that will be used to classify the sources of risk will be derived from the 5-M model, changing the mission variable into system complexity to get the following form: human factor, technological factor, environment, management, and system complexity. Navigation systems, that is, the systems responsible for providing information about the position of the aircraft, have followed development parallel to that of communication systems since, in large part, the technology used has had the same base. The ergonomic approach is centred on the design of controls and clear indicators to stop errors in the interaction process.
