For the general aviation pilot with little experience in operating rom busy aerodromes, negotiating the concrete and asphalt maze otaxiways, turnos, holding points, apron areas, etc, can be rather bewildering. Taking a wrong turn at the wrong time may not only be very embarrassing, but also potentially hazardous. It is very important that all pilots using such aerodromes be thoroughly amiliar with standard ground markings, as well as the layout othe manoeuvring area, and ground movement procedures. Ground movement charts or the major aerodromes and a number oprovincial aerodromes are provided in AIPNewZea land. Pilots need to be able to ollow ground movement charts while taxiing an aircrat. Large aerodromes with interconnecting taxiways are designed or speedy, efcient movement and sae trafc ow on the ground. To avoid becoming the cause oa bottleneck in the ow, pilots should amiliarise themselves with the meaning oaerodrome markings beore entering an aerodrome area. Contained in this article are some othe main aerodrome markings that you might expect to see while operating in New Zealand. We haven’t included every possible marking, but or those who would like urther inormation, a simple description and explanation can be ound in AI PNewZealan d. Details oNew Zealand standards or runway, taxiway and apron markings can be ound in Advi soryCircu lar139-6, Appendices 1 to 3. Although this inormation is designed or aerodrome operators, it also provides useul illustrations or pilots. Runway Markings All runway surace markings are painted white, sometimes edged with black (on concrete runways) to provide better defnition. At the intersection otwo paved runways, markings on the primary runway only are displayed. Aerodrome Markings All aerodrome users should be as amiliar with aerodrome ground markings as they are with highway trafc signs – not knowing what they represent could lead to a dangerous situation. Threshold Markings Threshold markings are provided on all paved runways. They are commonly reerred to as piano keys. They are a series oparallel, longitudinal, stripes (30 metres in length) across the width othe runway , commencing at a point 6 metres rom the runway end. TemporarilyDisplaced ThresholdPermanentlyDisplaced ThresholdDisplaced Landing Threshold When necessary, the landing threshold will be displaced to a point along the runway where the approach profle will allow an aircrat to clear some particular obstacle. The threshold may be temporarily or permanently displaced. Ithe obstacle will eventually be removed, then a temporarily displaced threshold is marked either by wing bars, cones, or marker boards placed outside the runway edge. Ithe obstacle cannot be removed, a permanently displaced threshold is marked by a transverse stripe 6 metres beore the new threshold marking. Arrows between the paved runway end and the transverse stripe are located at a fxed distance back rom the threshold stripes. Landing aircrat should not touch down beore the displaced landing threshold and should be own across the threshold markings at approximately 50 eet agl. It must be emphasised that a displaced landing threshold is not a displaced takeothreshold. It has nothing to do with the point or commencing the takeoroll. Indeed, ailure to use the ull takeodistance available could result in the aircrat having an inadequate takeodistance available, with reduction oobstacle clearance in the climb. 20 www.caa.govt.nzVECTOR – Pointing to Saer Aviation November / December 2007
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