5.4.2.15 Signs for holding aircraft and vehicles from entering areas where they would infringe on obstacle limitation surfaces or interfere with NAVAIDs are inscribed with the designator of the approach, followed by the letters ‘‘APCH’’; for example, ‘‘15.APCH.’’
5.4.3.13 5.4.3.15 U.S. practice is to install signs about 3 to 5 meters closer to the taxiway/runway (See Annex 14, Table 5.4).
5.4.3.16 The U.S. does not have standards for the location of runway exit signs.
5.4.3.24 A yellow border is used on all location signs, regardless of whether they are stand.alone or collocated with other signs.
5.4.3.26 U.S. practice is to use Pattern A on runway vacated signs, except that Pattern B is used to indicate that an ILS critical area has been cleared.
5.4.3.30* The U.S. does not have standards for signs used to indicate a series of taxi.holding positions on the same taxiway.
5.4.4.4* The inscription, ‘‘VOR Check Course,’’ is placed on the sign in addition to the VOR and DME data.
5.4.5.1* The U.S. does not have requirements for airport identification signs, though they are usually installed.
5.4.6.1* Standards are not provided for signs used to identify aircraft stands.
5.4.7.2 The distance from the edge of road to the road.holding position sign conforms to local highway practice.
5.5.2.2* 5.5.7.1* Boundary markers may be used to denote the edges of an unpaved runway.
5.5.3 There is no provision for stopway edge markers.
Chapter 6 Visual Aids for Denoting Obstacles
6.1 Recommended practices for marking and lighting obstacles are found in FAA Advisory Circular 70/7460.1J, Obstruction Marking and Lighting.
6.1.3 Any temporary or permanent structure, including all appurtenances, that exceeds an overall height of 200 feet (61m) above ground level or exceeds any obstruction standard contained in 14 CFR Part 77, should normally be marked and/or lighted.
6.2.1 This chapter provides recommended guidelines to make certain structures conspicuous to pilots during daylight hours. One way of achieving this conspicuity is by painting and/or marking these structures. Recommendations on marking structures can vary depending on terrain features, weather patterns, geographic location, and in the case of wind turbines, number of structures and overall layout of design.
6.2.3* The maximum dimension of the rectangles in a checkered pattern is 6 meters on a side.
6.2.7 Markers should be displayed in conspicuous positions on or adjacent to the structure so as to retain the general definition of the structure. They should be recognizable in clear air from a distance of at least 4,000 feet (1219m) and in all directions from which aircraft are likely to approach. Markers should be distinctively shaped, i.e., spherical or cylindrical, so they are not mistaken for items that are used to convey other information. They should be replaced when faded or otherwise deteriorated.
6.2.11 Flag markers should be displayed around, on top, or along the highest edge of the obstruction. When flags are used to mark extensive or closely grouped obstructions, they should be displayed approximately 50 feet (15m) apart. The flag stakes should be of such strength and height that they will support the flags above all surrounding ground, structures, and/or objects of natural growth.
6.2.12 Each side of the flag marker should be at least 2 feet (0.6m) in length. Standard does not specifically address mobile objects.
6.2.14 Color patterns. Flags should be colored as follows: solid, orange and white, and checkerboard. Standard does not specifically address mobile objects.
6.3.1 Obstruction lighting may be displayed on structures as follows: aviation red obstruction lights; medium intensity flashing white obstruction lights, high intensity flashing white obstruction lights, dual lighting, obstruction lights during construction, obstruction lights in urban areas, and temporary construction equipment lighting.
6.3.11 The height of the structure AGL determines the number of light levels. Recommendations on marking structures can vary depending on terrain features, weather patterns, geographic location, and in the case of wind turbines, number of structures and overall layout of design.
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