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AC 150/5300-4B 6/24/75 <br />61. OTHER MARKING PRACTICES. Airport owners and/or aviation -minded organi- <br />zations frequently carry out additional marking programs to aid pilots <br />in identifying the airport, the community, the direction/location of <br />the nearest airport, and tall objects which could impinge upon flight <br />safety. <br />a. Off -Airport Marking. The name of the community and/or an arrow <br />pointing toward the nearest airport is frequently painted on the <br />roof of a prominent building in the community, This type of air <br />marking is carried out by aviation organizations such as the 99's <br />an organization of women pilots. <br />b. On -Airport Marking. While no specific standard exists, a number of <br />airport owners have painted the airport name, field elevation, etc., <br />on the roof of a prominent airport building or in some instances on <br />the airport apron. When this type of marking is used, some program <br />for routine maintenance is required,as unintelligible marking is <br />worse than no marking at all. <br />c. Objects To Be Marked and Lighted. When any object or portion <br />thereof, either temporary or permanent, exceeds any standard for <br />determining obstructions set forth in Part 77 of the Federal <br />Aviation Regulations and/or a height of 200 feet above site level, <br />that object should be marked and lighted in accordance with the <br />applicable standards contained in Advisory Circular 70/7460-1, <br />Obstruction Marking and Lighting unless an FAA aeronautical <br />study has determined that the absence of such marking and/or <br />lighting will not impair safety to air navigation. <br />Page 68 <br />Chap 11 <br />Par 61 <br />