The introduction of new forms of surveillance has highlighted different understandings of surveillance. Surveillance should be used in its widest sense. It is not just position information, but any information required, for example identification, intentions, speed, etc. It is not just surveillance for ATC but also for pilots, electromechanical systems, etc.
IFATCA Policy is:
Following definitions be adopted:
Surveillance is the acquisition and monitoring of objects’ positions and/or other relevant data for the purpose of Air Traffic Management, such as identity, movement and intent.
Independent Surveillance is surveillance that does not depend on any action by object of the surveillance.
Dependent Surveillance is when surveillance data is supplied by object of the surveillance.
Automatic Dependent Surveillance (ADS) is when an electromechanical device, after activation, requires no human involvement to supply dependent surveillance data.
|See: WP 84 – Melbourne 2005|
Last Update: September 29, 2020