GM1 to AMC1 ATS.TR.210(c)(2) Operation of air traffic control service

CRITERIA FOR APPLICATION OF HORIZONTAL SEPARATION BASED ON RADAR AND/OR ADS-B AND/OR MLAT SYSTEMS

(a)The separation minimum or minima based on radar and/or ADS-B and/or MLAT systems to be applied should be prescribed by the air traffic services provider and approved by the competent authority according to the capability of the particular ATS surveillance system or sensor to accurately identify the aircraft position in relation to the centre of a position symbol, PSR blip, SSR response and taking into account factors which may affect the accuracy of the ATS surveillance system-derived information, such as aircraft range from the radar site and the range scale of the situation display in use.

(b)Separation based on the use of ADS-B, SSR and/or MLAT, and/or PSR position symbols and/or PSR blips should be applied so that the distance between the centres of the position symbols and/or PSR blips, representing the positions of the aircraft concerned, is never less than a prescribed minimum.

(c)Separation based on the use of PSR blips and SSR responses should be applied so that the distance between the centre of the PSR blip and the nearest edge of the SSR response (or centre, when authorised by the competent authority) is never less than a prescribed minimum.

(d)Separation based on the use of ADS-B position symbols and SSR responses should be applied so that the distance between the centre of the ADS-B position symbol and the nearest edge of the SSR response (or the centre, when authorised by the competent authority) is never less than a prescribed minimum.

(e)Separation based on the use of SSR responses should be applied so that the distance between the closest edges of the SSR responses (of the centres, when authorised by the competent authority) is never less than a prescribed minimum.

(f)In no circumstances should the edges of the position indications touch or overlap unless vertical separation is applied between the aircraft concerned, irrespective of the type of position indication displayed and separation minimum applied.