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The approach surfaces, shown on Thompson Airport Zoning Plan No. E.2647, dated June 7, 1988, are surfaces abutting each end of the strips associated with the runways designated 05-23 and 14-32, and are described as follows:
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(a) a surface abutting the end of the strip associated with runway approach 05 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 and distant 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; said imaginary horizontal line being 300 m measured vertically above the elevation at the end of the strip;
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(b) a surface abutting the end of the strip associated with runway approach 23 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 and distant 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; said imaginary horizontal line being 300 m measured vertically above the elevation at the end of the strip;
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(c) a surface abutting the end of the strip associated with runway approach 14 consisting of an inclined plane having a ratio of 1 m measured vertically to 20 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 2 500 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 280 m from the projected centre line; said imaginary horizontal line being 125 m measured vertically above the elevation at the end of the strip; and
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(d) a surface abutting the end of the strip associated with runway approach 32 consisting of an inclined plane having a ratio of 1 m measured vertically to 20 m measured horizontally rising to an imaginary horizontal line drawn at right angles to the projected centre line of the strip and distant 2 500 m measured horizontally from the end of the strip; the outer ends of the imaginary horizontal line being 280 m from the projected centre line; said imaginary horizontal line being 125 m measured vertically above the elevation at the end of the strip.
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