65 STAT.]
PUBLIC LAW 172—OCT. 11, 1951
so constructed as to show an unbroken light over an arc of the horizon of 20 points of the compass (225 degrees), so fixed as to show the light 10 points (112% degrees) on each side of the vessel, that is, from right ahead to 2 points (22% degrees) abaft the beam on either side, and of such a character as to be visible at a distance of at least 5 miles. (ii) Either forward of or abaft the white light mentioned in sub-section (i) a second white light similar in construction and character to that light. Vessels of less than 150 feet in length, and vessels engaged in towing, shall not be required to carry this second white light but may do so. (iii) These two white lights shall be so placed in a line with and over the keel that one shall be at least 15 feet higher than the other and in such a position that the lower light shall be forward of the upper one. The horizontal distance between the two white lights shall be at least three times the vertical distance. The lower of these two white lights or, if only one is carried, then that light, shall be placed at a height above the hull of not less than 20 feet, and, if the breadth of the vessel exceeds 20 feet, then at a height above the hull not less than such breadth, so however that the light need not be placed at a greater height above the hull than 40 feet. I n all circumstances the light or lights, as the case may be, shall be so placed as to be clear of and above all other lights and obstructing superstructures. (iv) On the starboard side a green light so constructed as to show an unbroken light over an arc of the horizon of 10 points of the compass (1121/2 degrees), so fixed as to show the light from right ahead to 2 points (22% degrees) abaft the beam on the starboard side, and of such a character as to be visible at a distance of at least 2 miles. (v) On the port side a red light so constructed as to show an unbroken light over an arc of the horizon of 10 points of the compass (112% degrees), so fixed as to show the light from right ahead to 2 points (22% degrees) abaft the beam on the port side, and of such a character as to be visible at a distance of at least 2 miles. (vi) The said green and red sidelights shall be fitted with inboard screens projecting at least 3 feet forward from the light, so as to prevent these lights from being seen across the bows, (b) A seaplane under way on the water shall carry:— (i) In the forepart amidships where it can best be seen a bright white light, so constructed as to show an unbroken light over an arc of the horizon of 220 degrees of the compass, so fixed as to show the light 110 degrees on each side of the seaplane, namely, from right ahead to 20 degrees abaft the beam on either side, and of such a character as to be visible at a distance of at least 3 miles. (ii) On the right or starboard wing tip a green light, so constructed as to show an unbroken light over an arc of the horizon of 110 degrees of the compass, so fixed as to show the light from right ahead to 20 degrees abaft the beam on the starboard side, and of such a character as to be visible at a distance of at least 2 miles. (iii) On the left or port wing tip a red light, so constructed as to show an unbroken light over an arc of the horizon of 110 degrees of the compass, so fixed as to show the light from right ahead to 20 degrees abaft the beam on the port side, and of such a character as to be visible at a distance of at least 2 miles.
409
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