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1 <br />' Zone C: Height restrictions only, to prevent penetration of imaginery <br />' surfaces. <br />' General: No use shall be made of any land in any of the safety zones <br />which creates or causes interference with the operation of radio or <br />' electronic facilities on the airport or with radio or electronic communi- <br />' cations between the airport and aircraft, makes it difficult for pilots <br />to distinguish between airport lights and other lights, results in glare <br />' in the eyes of pilots using the airport, impairs visibility in the vicinity <br />of the airport, or otherwise endangers the landing, taking off, or <br />' maneuvering of aircraft. <br />' F. Wind Analysis and Runway Orientation Requirements <br />' The configuration or layout of an airport is determined by the number and <br />orientation of the runways. Among the primary factors influencing runway <br />orientation are the direction and velocity of the wind. Wind conditions <br />' affect all airplanes to some degree, but generally, smaller aircraft <br />are affected the most. <br />' The most desirable runway orientation, based on wind, is the one which <br />' has the largest wind coverage and minimum crosswind components. Wind <br />coverage is that percent of time for which operations can be conducted <br />1 on a runway without exceeding a specified crosswind component. The <br />desirable wind coverage for an airport is to achieve a wind with less <br />than 10.5 knot or 12 MPH crosswind component 95 percent of the time <br />' based on the total hours of weather observations. <br /> <br /> 11 <br />' <br />