GM1 to AMC3 ATS.TR.210(c)(2)(i) and AMC4 ATS.TR.210(c)(2)(i) Operation of air traffic control service

PROCEDURAL SEPARATION — LONGITUDINAL SEPARATION MINIMA BASED ON DISTANCE USING DISTANCE MEASURING EQUIPMENT (DME) AND/OR GNSS — APPLICATION

(a)Where the term ‘on track’ is used in the provisions relating to the application of longitudinal separation minima using DME and/or GNSS, it means that the aircraft is flying either directly inbound to or directly outbound from the station/waypoint.

(b)Separation should be established by maintaining not less than the specified distance(s) between aircraft positions as reported by reference to DME in conjunction with other appropriate navigation aids and/or GNSS. This type of separation should be applied between two aircraft using DME, or two aircraft using GNSS, or one aircraft using DME and one aircraft using GNSS. Direct controller-pilot VHF voice communication should be maintained while such separation is used.

(c)For the purpose of applying GNSS-based separation minimum, a distance derived from an integrated navigation system incorporating GNSS input is regarded as equivalent to GNSS distance.

(d)When applying these separation minima between any aircraft with area navigation capability, air traffic controllers should specifically request GNSS-derived distance.