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The approach surfaces, shown on Department of Transport Fort Simpson Airport Zoning Plan No. E.1544, are surfaces abutting each end of the strips associated with the runways designated 12-30 and 17-35 and are described as follows:
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consisting of an inclined plane having a ratio of 1 m measured vertically to 50 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip, 300 m measured vertically above the elevation at the end of the strip, and 15 000 m measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being 2 400 m from the projected centre line; and
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consisting of an inclined plane having a ratio of 1 m measured vertically to 40 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip, 75 m measured vertically above the elevation at the end of the strip, and 3 000 m measured horizontally from the end of the strip, the outer ends of the imaginary horizontal line being 375 m from the projected centre line.
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