C56
PROCLAMATIONS—AUG. 15, 1953
[68 STAT.
(iii) the term "power-driven vessel" means any vessel propelled by machinery; (iv) every power-driven vessel which is under sail and not under power is to be considered a sailing vessel, and every vessel under power, whether under sail or not, is to be considered a power-driven vessel; (v) a vessel or seaplane on the water is "under way" when she is not at anchor, or made fast to the shore, or aground; (vi) the term "height above the hull" means height above the uppermost continuous deck; (vii) the length and breadth of a vessel shall be deemed to be the length and breadth appearing in her certificate of registry; (viii) the length and span of a seaplane shall be its maximum length and span as shown in its certificate of airworthiness, or as determined by measurement in the absence of such certificate; (ix) the word "visible," when applied to lights, means visible on a dark night with a clear atmosphere; (x) the term "short blast" means a blast of about one second's duration; (xi) the term "prolonged blast" means a blast of from four to six seconds' duration; (xii) the word "whistle" means whistle or siren; (xiii) the word "tons" means gross tons. P A R T B.—LIGHTS AND SHAPES RULE 2
(a) A power-driven vessel when under way shall carry: (i) On or in front of the foremast, or if a vessel without a foremast then in the forepart of the vessel, a bright white light 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 (22K 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 a t 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. In 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 (112K 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.
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