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The approach surfaces, shown outlined in blue on Department of Transport Plan E.1539, are surfaces abutting each end of the strips associated with the runways designated 04-22, 12R-30L, 18R-36L, 12L-30R and 18L-36R, and are described as follows:
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consisting of an inclined plane having a ratio of one foot measured vertically to 50 feet measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip, 200 feet measured vertically above the elevation at the end of the strip, and 10,000 feet measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being 2,000 feet from the projected centre line, and
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consisting of an inclined plane having a ratio of one foot measured vertically to 40 feet measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip, 207.5 feet measured vertically above the elevation at the end of the strip, and 8,300 feet measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being 955 feet from the projected centre line.
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