What does safety mean for networks?

This article aims at describing an air navigation service provider approach to network safety in relation to its particular use in air traffic management. The approach is based on the fact that “network hazards” have limited direct impact on the Air Traffic Management (ATM) System as a whole. It is expected that a network hazard would not solely lead to an accident, or would not be the only contributor to an accident. We do not exclude disturbances caused to Air Traffic Controller [5], but the network is less involved. This is a crucial particularity caused by the network situation in a technical system, where networks´ main task is to manage data transport in accordance to network state evolution. However there are cases with limited barriers, like the transport of voice data.