AMC1 ATS.TR.155(e) ATS surveillance services
ED Decision 2020/008/R
INFORMATION
REGARDING TRAFFIC ON A CONFLICTING PATH
(a) Information regarding traffic on a conflicting path should be given, whenever practicable, in the following form:
(1) relative bearing of the conflicting traffic in terms of the 12-hour clock;
(2) distance from the conflicting traffic in kilometres or nautical miles;
(3) direction in which the conflicting traffic appears to be proceeding; and
(4) level and type of aircraft or, if unknown, relative speed of the conflicting traffic, e.g. slow or fast.
(b) Pressure-altitude-derived level information, even when unverified, should be used in the provision of collision hazard information because such information, particularly if available from an otherwise unknown aircraft (e.g. a VFR flight) and given to the pilot of a known aircraft, could facilitate the location of a collision hazard.
(c) If the level information has not been verified, the accuracy of the information should be considered uncertain and the pilot should be informed accordingly.
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