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Rules For Air Traffic

49

Every aircraft flying beneath clouds shall always do so, so far as it is safe and practicable, at such a distance below the clouds as will enable it readily to see and be seen. 

31. In order to obviate the increased risk of collision which exists on air traffic routes, the following rules shall be observed by aerodynes and airships when flying on or in the vicinity of such routes:--
(a) An aircraft flying by compass along the straight line (rhumb line) joining two points on an air traffic route in common use, shall keep such line at least 1 mile on its left;
(b) An aircraft following, either an officially recognized air traffic route, or a route frequented by aircraft and indicated on the ground by a line of landmarks such as a road, railway, river, canal, coastline, etc., shall keep such route at least 1,000 feet on its left;
(c) An aircraft shall not fly keeping on its right any of the lines or routes referred to in this paragraph, except at a distance therefrom sufficient to avoid aircraft following such lines or routes in accordance with the rules of this paragraph;
(d) An aircraft crossing one of the lines or routes referred to in this paragraph shall cross it at right angles as rapidly as possible; 
(e) In the case of pre-arranged flights in group formation, the aircraft of the leader of the group shall lead the flight in such a manner that every aircraft in the group can comply with the above rules of this paragraph.
32. To facilitate the application of the rules for air traffic contained in this Part, the pilot of a mechanically driven aerodyne shall, save in exceptional circumstances, be placed either in the plane of symmetry of the aerodyne or on the left-hand side of such plane.

SECTION IV
Special Rules for Air Traffic On and In The Vicinity Of All Aerodromes

33. The rules of this Section shall be applied on and in the vicinity of all aerodromes:
(a) Aircraft about to land on an aerodrome shall be given free way;
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