GM3 to AMC2 ATS.TR.155(c)(3) ATS surveillance services

FINAL APPROACH PROCEDURES — SURVEILLANCE RADAR APPROACH

(a)A surveillance radar approach should only be performed with equipment suitably sited and a situation display specifically marked to provide information on position relative to the extended centre line of the runway to be used and distance from touchdown, and which is specifically approved for the purpose by the competent authority.

(b)When conducting a surveillance radar approach, the air traffic controller should comply with the following:

(1)at or before the commencement of the final approach, the aircraft should be informed of the point at which the surveillance radar approach will be terminated;

(2)the aircraft should be informed when it is approaching the point at which it is computed that descent should begin, and just before reaching that point it should be informed of the OCA/OCH and instructed to descend and check the applicable minima;

(3)azimuth instructions should be given as follows:

(i)the pilot should be informed at regular intervals of the aircraft’s position in relation to the extended centre line of the runway. Heading corrections should be given as necessary to bring the aircraft back on to the extended centre line;

(ii)in the case of azimuth deviations, the pilot should not take corrective action unless specifically instructed to do so;

(4)except as provided in point (c), information on distance from touchdown should normally be passed on at every 2 km (each NM);

(5)pre-computed levels through which the aircraft should be passing to maintain the glide path should also be transmitted at every 2 km (each NM) at the same time as the distance; and

(6)the surveillance radar approach should be terminated:

(i)at a distance of 4 km (2 NM) from touchdown, except as provided in point (c); or

(ii)before the aircraft enters an area of continuous radar clutter; or

(iii)when the pilot reports that a visual approach can be effected, whichever is the earliest.

(c)When, as determined by the competent authority, the accuracy of the radar equipment permits, surveillance radar approaches may be continued to the threshold of the runway, or to a prescribed point less than 4 km (2 NM) from touchdown, in which case:

(1)distance and level information should be given at each km (each half NM);

(2)transmission should not be interrupted for intervals of more than 5 seconds while the aircraft is within a distance of 8 km (4 NM) from touchdown; and

(3)the air traffic controller should not be responsible for any duties other than those directly connected with a particular approach.

(d)Levels through which the aircraft should pass to maintain the required glide path, and the associated distances from touchdown, should be pre-computed and displayed in such a manner as to be readily available to the air traffic controller concerned.