THE HONG KONG GOVERNMENT GAZETTE, JULY 27, 1928. 317
1. The rules concerning lights shall be complied with in all weathers from sunset to sunrise, and during such time no other lights shall be exuibre which may be mistaken for the navigation lights hereinafter prescribed. The latter shall not be dazzling.
2. A flying machine, when in the air or mancuvring on land or water under its own power, carry the following lights: -
shall
(a) Forward, a white light visible in a dihedral angle of 220 degrees bisected by the vertical
plane of symmetry of the aircraft and visible at a distance of at least 5 miles, (b) On the right side, a green light so constructed and fixed as to show an unbroken light between two vertical planes whose dihedral angle is 110 degrees when measured to the right from dead ahead, and visible at a distance of at least 3 miles.
(c) On the left side, a red light so constructed and fixed as to show an unbroken light between two vertical planes whose dihedral angles is 110 degrees when measured to the left from dead ahead, and visible at a distance of at least 3 miles.
(d) The said green and red lights shall be fitted so that the green light shall not be seen from
the left side, nor the red light from the right side.
(6). At the rear, and as far aft as possible, a white light shining rearwards and visible in a dihedral angle of 140 degrees bisected by the vertical plane of symmetry of the aircraft, and visible at a distance of at least 3 miles.
() In the case where, in order to fulfil the above conditions, a single light has to be replaced by several lights, the field of visibility of each of these fights should be so limited that only one can be seen at a time.
3. The rules hereinbetore set out for the lighting of flying machines shall apply to airships subject to the following modifications:-
(a) All lights shall be doubled, the forward and aft lights vertically, and the side lights
horizontally in a fore and aft direction.
(b) Both lights of each pair forward and aft shall be visible at the same time.
The distance between the lights comprising a pair shall not be less than 6 feet.
4. An airship, when being towed, shall carry the lights specified in paragraph 3, and, in addition, those specified in paragraph 6 of this Schedule for airships not under control.
5.-(a) A flying machine, or airship, when on the surface of the water, and when not under control, that is to say, not able to manœuvre as required by the Regulations for the Prevention of Collisions at Sea, shall carry two red lights not less than 6 feet apart one over the other, and visible in all directions at a distance of at least 2 miles.
(1) Aircraft to which this paragraph applies, when not making way through the water, shall not carry the side lights, but when making way shall carry them.
6. An airship which from any cause is not under control, or which has voluntarily stopped her engine shall, in addition to the other specified ligats, display conspicuously two red lights, one over the other, not less than 6 feet apart, and visible in all directions at a distance of at least 2 miles.
By day an airship, when being towed, and which from any cause is not under control, shall display conspicuously two black balls or shapes, each 2 fect in diameter, placed one over the other not less than 6 feet apart.
An airship moored, or under way but having voluntarily stopped its engines, shall display conspicuously by day a black ball or shape, 2 feet in diameter, and shall be treated by other aircraft as being not under control.
7. A free balloon shall carry one bright white light below the basket at a distance of not less than 16 feet, and to be visible in all directions at a distance of at least 2 miles.
8. A fixed balloon shall carry in the same position as the white light mentioned in paragraph 7 of this Sebedule, and in lieu of that light, three lights in a vertical line one over the other, not less than 12 feet apart. The highest and lowest of these lights shall be red, and the middle light shall be white, and they shall be visible in all directions at a distance of at least 2 miles.
In addition, the mooring cable shall have attached to it at intervals of 1,000 feet, measured from the basket, groups of three lights similar to those mentioned in the preceding paragraph. In addition, the object to which the balloon is moored on the ground shall have a similar group of lights to mark its position.
By day the mooring cable shall have attached to it. at intervals of not more than 300 feet measured from the basket, tubular streamers not less than 8 inches in diameter and 6 feet in length, and marked with alternate bands of white and red, 18 inches in width.