THE HONG KONG GOVERNMENT GAZETTE, NOVEMBER 12, 1937.
(a) in every case, it shall display forward centrally where it can best be seen, a white light visible all round the horizon at a distance of at least 1 mile:
(b) in a case where the length of the flying machine is 150 feet or upwards, it shall display, in addition to any other light required by this paragraph to be displayed, a white light at or near its stern at a lower height than the forward light specified in sub-paragraph (a) of this paragraph, and visible all round the horizon at a 'distance of at least 1 mile :
(c) in a case where the maximum lateral dimension of the flying machine is 150 feet or upwards, it shall display, in addition to any other light required by this paragraph to be displayed, a white light on each side placed in such a manner as to demarcate the maximum lateral dimension of the flying machine and visible, so far as practi- cable, all round the horizon at a distance of at least 1 mile.
Gliders and free balloons.
7-(1) In all cases in which flying machines are required by this Section of this Schedule to display lights, a' glider shall display a red light visible, so far as practicable, in all directions.
(2) A free balloon shall display a red light placed not less than 15 or more than 30 feet below the basket and visible, so far as practicable, in all directions at a distance of at least 24 miles.
Captive Balloons and Kites.
8.-(1) In the case of a captive balloon or kite, lights shall be displayed in accordance with the following provisions of this sub- paragraph:-
(a) the balloon or kite, when flown at an altitude exceeding 200 feet above the ground or at any altitude if it is less than 3 miles from an aerodrome or from a recognised air route, shall display a group of two lights consisting of a white light placed 12 feet vertically above a red light, both these lights being visible, so far as practic- able, in all directions at a distance of at least 2 miles, and the white light being placed not less than 15 or more than 30 feet below the basket, or, if there is no basket, below the lowest part of the balloon or kite:
(b) in addition, from the mooring cable of the balloon or kite there shall be displayed, at intervals of 1,000 feet measured from the said group of two lights, similar groups of two lights, white and red, and, if the lowest group of lights is obscured by clouds, an additional group shall be displayed below the cloud base:
(c) in addition, the position of the object to which the balloon or kite is moored on the ground shall be marked by a group of three flashing lights arranged in a horizontal plane at the apexes of a triangle approximately equilateral and each side of which measures at least 80 feet; the side of this triangle, perpendicular to the horizontal projection of the cable, shall be delimited by two red lights; the third light shall be a green light placed opposite the 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.
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