Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Short Term Conflict Alert (STCA) is an automated warning system for air traffic controllers (ATCO). It is a ground-based safety net intended to assist the controller in preventing collision between aircraft by generating, in a timely manner, an alert of a potential or actual infringement of separation minima. ICAO Doc 4444 requires that radar systems should provide for the display of safety-related alerts including the presentation of actual and predicted conflict. It is worth mentioning that ICAO Doc 4444 does neither provide definitions of the term STCA nor Conflict Alert. Instead the term STCA is ambiguously used in ATC community to identify such alerts as well as for data processing systems providing the alert function.

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