CS ADR-DSN.M.660 Circling guidance lights

(a)Applicability: Circling guidance lights should be provided when existing approach and runway lighting systems do not satisfactorily permit identification of the runway and/or approach area to a circling aircraft intending to carry out circling approaches.

(b)Location and positioning:

(1)The location and number of circling guidance lights should be adequate to enable a pilot, as appropriate, to:

(i)join the downwind leg or align and adjust the aircraft’s track to the runway at a required distance from it and to distinguish the threshold in passing; and

(ii)keep in sight the runway threshold and/or other features which should make it possible to judge the turn on to base leg and final approach, taking into account the guidance provided by other visual aids.

(2)Circling guidance lights should consist of:

(i)lights indicating the extended centre line of the runway and/or parts of any approach lighting system; or

(ii)lights indicating the position of the runway threshold; or

(iii)lights indicating the direction or location of the runway; or a combination of such lights as is appropriate to the runway under consideration.

(c)Characteristics:

(1)Circling guidance lights should be fixed or flashing lights of an intensity and beam spread adequate for the conditions of visibility and ambient light in which it is intended to make visual circling approaches. The flashing lights should be white, and the steady lights either white or gaseous discharge lights.

(2)The lights should be designed and be installed in such a manner that they should not dazzle or confuse a pilot when approaching to land, taking off, or taxiing.

[Issue: ADR-DSN/3]