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THE HONG KONG GOVERNMENT GAZETTE, NOVEMBER 12, 1937.
3. Nothing in this Section of this Schedule shall interfere-- (a) with the operation of any special rules made by any State with respect to additional signal or station lights for military air- craft, aircraft exclusively employed in State service or aircraft in group formation; or
(b) with the exhibition of recognition signals adopted by owners of aircraft which have been authorised by their respective Govern- ments and duly published.
Lights and Visual Signals to be displayed by Aircraft.
Flying Machines.
4.-(1) Every flying machine in the air or the landing area of a land aerodrome shall display, the following lights, that is to say:
(a) on the right side, a green light, fixed so as to show an unbroken light, visible at a distance of at least 5 miles, throughout a dihedral angle of 110° formed by two vertical planes, of which one is parallel to the plane of symmetry of the aircraft and directed dead ahead, and the other is directed to the right;
(b) on the left side, a red light, fixed so as to show an unbroken light, visible at a distance of at least 5 miles, throughout a dihedral angle of 110° formed by two vertical planes, of which one is parallel to the plane of symmetry of the aircraft and directed dead ahead,
and the other is directed to the left;
(c) at the rear, a white light, fixed so as to show astern an unbroken light, visible at a distance of at least 3 miles, throughout a dihedral angle of 140° formed by twa vertical planes and bisected by the plane of symmetry of the aircraft.
(2) In
cases where, in order to comply with the foregoing provisions of this paragraph, a single light has to be replaced by several lights, the field of visibility of each of those lights shall be so limited that only one of them can be seen at a time.
(3) In the case of a flying machine with a maximum span of less than 65 feet, the lights required by this paragraph to be displayed may be combined in one or more lamps placed centrally, provided that the requirements of this paragraph as to colour and visibility are complied with.
5. Every flying machine under way on the surface of the water shall display lights in accordance with the following provisions of this paragraph
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(a) if it is under control and is not being towed, it shall display the lights specified in paragraph 4 of this Schedule and in addition, forward, a white light, fixed so as to show forward an unbroken light. visible at a distance of at least 3 miles, throughout a dihedral angle of 220° formed by two vertical planes and bisected by the plane of symmetry of the aircraft;
(b) if it is being towed, it shall display the lights specified in paragraph 4 of this Schedule;
(c) if it is not under control, it shall display two red lights placed where they can best be seen, one vertically over the other, not less than 3 feet apart, and both being visible, so far as practic. able, all round the horizon, at a distance of at least 2 miles, and it shall also display-
(i) if making way, the lights specified in paragraph 4 of this Schedule; or
(ii) if not making way, the light specified in sub-paragraph (1) (c) of paragraph 4 of this Schedule;
(d) if it is towing another flying machine or a glider, it shall display the lights specified in paragraph 4 of this Schedule and it shall also display, forward, two white lights placed where they can best be seen,
one vertically over the other, not less than 6 feet apart and both being visible at a distance of at least 3 miles, throughout a dihedral angle of 220° formed by two vertical planes and bisected by the plane of symmetry of the aircraft.
6. Every flying machine at anchor or moored on the surface of the water shall display lights in accordance with the following provisions of this paragraph:--