THE HONG KONG GOVERNMENT GAZETTE, DECEMBER 17, 1937.
to the horizontal projection of the cable, shall be delimited by two Schedule red lights; the third light shall be a green light placed opposite the IV,-contd.] direction of the cable.
(2) By day the mooring cable of a captive balloon shall have attached to it at intervals of not more than 600 feet measured from the basket, or, if there is no basket, from the lowest part of the balloon, tubular streamers not less than 16 inches in diameter and 6 feet in length, and marked with alternate bands of white and red 20 inches in width.
(3) By day the mooring cable of a kite shall be marked, either (a) in the manner required by the last preceding sub-paragraph in the case of a captive balloon; or
(b) by streamers of stout paper attached to the cable at intervals of 300 feet measured from the lowest part of the kite, being streamers not less than 32 inches in length or 1 foot in width in their widest part and marked with alternate bands of white and red 4 inches wide.
(4) By way of exception to the provisions of this paragraph, captive balloons and kites used for meteorological observation which, owing to their insufficient static lift, cannot display the lights and signals required by this paragraph to be displayed may be flown, but only over areas which are notified as danger areas by notices to airmen. In every such case the position of the object to which the captive balloon or kite is mcored on the ground shall be marked as required by sub-paragraph (1) (c) of this paragraph.
Airships.
9.-(1) Except as provided in the next following paragraph, an airship when under way shall display the following lights :-
(a) forward, a white light, fixed so as to show forward an unbroken light, visible at a distance of at least 5 miles, throughout a dihedral angle of 220° formed by two vertical planes and bisected by the plane of symmetry of the aircraft;
(b) on the right side, a green light fixed so as to show an un- broken 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;
(c) on the left side, a red light fixed so as to show an un- broken 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;
(d) 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 two vertical planes and bisected by the plane of symmetry of the aircraft.
(2) In a case 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 can be seen at a time.
10.-(1) An airship which is under way and which is not under control, or which has voluntarily stopped its engines, or which is being towed, shall display the following lights :-
(a) the forward and rear lights specified in sub-paragraphs (1) (a) and (1) (d) of the last foregoing paragraph;
(b) in addition, below the airship, two red lights placed vertically one below the other 12 feet apart, the upper light being 25 feet below the control car, and both being visible, so far as practicable, in all directions at a distance of not less than 2 miles;
(c) in addition, if making way but not otherwise, the side lights specified in sub-paragraphs (1) (b) and (1) (c) of the last fore- going paragraph.
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