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12/5/78 AC 150/5300-4B CEG 3 <br />Appendix 9 <br />threshold and increases uniformly to 350 feet (110 m) on <br />each side of the centerline at a point 2,250 feet (690 m) <br />from the start; thereafter, it extends laterally 350 feet <br />(110 m) on each side of the centerline. (See Figures <br />1 and 2.) <br />(b) Runways Expected to Accommodate Aircraft of More Than <br />12,500 Pounds (5 670 kg), Maximum Certificated Takeoff <br />Weight. In the plan view, the centerline of this surface <br />extends 10,000 feet (3 000 m) along the extended runway <br />centerline. This surface extends laterally 200 feet (60 m) <br />on each side of the centerline at the runway approach <br />threshold and increases uniformly to 500 feet (150 m) on <br />each side of the centerline at a point 1,500 feet (450 m) <br />from the start; thereafter, it extends laterally 500 feet <br />(150 m) on each side of the centerline.. (See Figures <br />1 and 2.) <br />(2) Approach End of Runways Expected to Accommodate Landing Visibility <br />Minimums as Low as 3/4 of a Mile. No object should penetrate a <br />surface that starts 200 feet (60 m) out from the runway approach <br />threshold and at the elevation of the runway centerline at the <br />runway approach threshold and slopes upward from the starting <br />point at a slope of 20 (horizontal) to 1 (vertical). In the <br />plan view, the centerline of this surface extends 10,000 feet <br />(3 000 m) along the extended runway centerline. This surface <br />extends laterally 500 feet (150 m) on each side of the centerline <br />at the starting point 200 feet (60 m) out from the runway approach <br />threshold, and increases uniformly to 2,000 feet (600 m) on each <br />side of the centerline at the far end of this surface. (See <br />Figures 1 and 2.) <br />(a) If the instrument approach procedure is to utilize an <br />offset localizer with an offset angle of 3 degrees or less, <br />the above described surface is centered upon the final <br />approach course rather than the extended runway centerline. <br />(See Figure 3.) <br />(3) <br />(b) If the runway approach threshold is being displaced for <br />reasons other than a controlling object, the surface <br />described in paragraph 6a()) should be considered rather <br />than the above described surface in view of possible lower <br />minimums, <br />Approach End of Runways Expected to Accommodate Landing Visibility <br />Minimums Lower Than 3/4 of a Mile (Except Category II Runway End). <br />No object should penetrate a surface that starts 200 feet (60 m) <br />out from the runway'approach threshold and at the elevation of <br />the runway centerline at the runway approach threshold and slopes* <br />Par 6 Page 5 <br />