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7.3.2 Except when transfer of radar control is to be effected, non-radar separation shall be established by a radar controller before an aircraft under radar control reaches the limits of the controller’s area of responsibility, or before the aircraft leaves the area of radar coverage.
7.3.3 When authorized by the appropriate ATS authority, radar separation based on the use of RPS and/or PSR blips shall be applied so that the distance between the centres of the RPS’s and/or PSR blips, representing the positions of the aircraft concerned, is never less than a prescribed minimum.
7.3.4 Radar separation based on the use of PSR blips and SSR responses shall be applied so that the distance between the centre of the PSR blip and the nearest edge of the SSR response (or the centre, when authorized by the appropriate ATS authority) is never less than a prescribed minimum.
7.3.5 Radar separation based on the use of SSR responses shall be applied so that the distance between the closest edges of the SSR responses (or the centres, when authorized by the appropriate authority) is never less than a prescribed minimum.
7.3.6 In no circumstances shall the edges of the radar position indications touch or overlap unless vertical separation is applied between the aircraft concerned, irrespective of the type of radar position indication displayed and radar separation minimum applied.
VI. Radar Services
7.3.7 In the event that the radar controller has been notified of a controlled flight entering or about to enter the airspace within which radar separation is applied, but has not radar identified the aircraft, the controller may, if so prescribed by the appropriate ATS authority, continue to provide radar service to identified aircraft provided that:
a)  reasonable assurance exists that the unidentified controlled flight will be identified using SSR or the flight is being operated by an aircraft of a type which may be expected to give an adequate return on primary radar in the airspace within which radar separation is applied; and
b)  radar separation is maintained between the radar-controlled flights and any other observed radar position until either the unidentified controlled flight has been identified or non-radar separation has been established.

7.3.8 Radar separation may be applied between an aircraft taking off and a preceding departing aircraft or other radar-controlled traffic provided there is reasonable assurance that the departing aircraft will be identified within 2 km (1 NM) from the end of the runway, and that, at the time, the required separation will exist.
7.3.9 Radar separation shall not be applied between aircraft holding over the same holding point. Application of radar separation between holding aircraft and other flights shall be subject to requirements and procedures prescribed by the appropriate ATS authority.
7.4 Radar separation minima

7.4.1 Unless otherwise prescribed in accordance with 7.4.2, 7.4.3 or 7.4.4, or Part IV with respect to independent and dependent parallel approaches, the horizontal radar separation minimum shall be 9.3 km (5.0 NM).
7.4.2 The radar separation minimum in 7.4.1 may, if so prescribed by the appropriate ATS authority, be reduced, but not below:
a)  5.6 km (3.0 NM) when radar capabilities at a given location so permit; and
b)  4.6 km (2.5 NM) between succeeding aircraft which are established on the same final approach track within 18.5 km (10 NM) of the runway end. A reduced separation minimum of 4.6 km (2.5 NM) may be applied, provided:
i)  the average runway occupancy time of landing aircraft is proven, by means such as data collection and statistical analysis and methods based on a theoretical model, not to exceed 50 seconds;
ii)  braking action is reported as good and runway occupancy times are not adversely affected by runway contaminants such as slush, snow or ice;
iii) a radar system with appropriate azimuth and range resolution and an update rate of 5 seconds or less is used in combination with suitable radar displays; and
　
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本文鏈接地址：Rules of the Air and Air Traffic Services(78)