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6/24/75 AC 150/5300-4B CHAPTER 11. MARKING, LIGHTING, AND VISUAL AIDS 57. GENERAL. A pilot intending to land at a strange airport must be able to readily determine the physical limits of the landing surface, the direc- tion of the surface wind, and whether a nonstandard traffic pattern is required. This chapter covers the marking and lighting recommended to provide this information to the pilot. The chapter also identifies visual aids appropriate to a utility airport which will improve opera- tions at night or during periods of reduced visibility. 58. AIRPORT MARKING. The following airport markings which enhance daylight VFR operations are recommended for utility airports. It is suggested that they be included in the initial airport development project. Figure 11-1 illustrates airport marking. Advisory Circulars 150/5340-1, Marking of Paved Areas on Airports, and 150/5340-5, Segmented Circle Airport Marker System, provide guidance on this subject. FAA Airports District Offices may be contacted for advice concerning specific marking problems. a. Runway Marking. Two methods are employed to mark airport runways, depending upon whether the runway is unpaved (dirt, turf) or paved (asphalt, concrete). (1) Unpaved Runways. The physical limits of a dirt or turf runway are frequently difficult to discern. Manmade markers which are easy to see are used to delineate the limits of the usable area. Figure 11-1 insert illustrates one type of marker con- struction.. Local ingenuity can be used to advantage to con- struct acceptable markers using local materials. Markers are placed at the corners and at intervals of 400 feet or less along the periphery of the usable area. (2) Paved Runways. The surfaced runway are a centerline stripe Runway markings are physical limits of an readily discernible. are adequate for most white. asphalt or concrete Runway numbers and utility airports. b. Taxiway Marking. Only paved taxiway surfaces are marked. Marking consists of a centerline stripe with a transverse "holding line" located 50 feet from the runway edge. Taxiway markings are yellow. c. Segmented Circle Marking System. A 100-,foot=diameter circle having at least 18 segments is constructed around the airport's wind direc- tion indicator. The circle helps the visiting pilot to locate the wind indicator. It also serves as another visual identification of an airport. Segments are similar to those used to mark unpaved run- ways. Airports having nonstandard traffic patterns are able to convey this information with traffic pattern indicators Located adjacent to the segmented circle (see Advisory Circular 150/5340-5). Chap 11 Par 57 Page 65