Page:United States Statutes at Large Volume 38 Part 1.djvu/1193

 SIXTY·THIRD CONGRESS. Szss. III. C11. 153. 1915. 1175 oaracrrr Lmrrs. Cammy umm. Pontoon boats and pontoon rafts shall never be marked with a ¥¤*°°¤=· number of persons greater than that obtained in the manner specified in this section. This number shall be reduced- B¤i¤¤=¤¤¤- First. When it is greater than the number of persons for which there is proper seating accommodation, the latter number being determined in such a way that the persons when seated do not interfere in any way with the use of the oars. Second. When in the case of boats other than those of the first two sections of the first class, the freeboard, when the boat is fully loaded is less than the freeboard laid down for each type respectively. In such circumstances the number shall be reduced until the freeboard, when the boat is fully loaded, is at least equal to the standard freeboard laid down above. In boats of types .1C and 2B the raised part of the deck at the sides ?°¤*°°’·¤· may be regarde as affording seating accommodation. EQUIVALENTS Fon AND wmcrrr or rmi: rmzsous. ,,§,3$*§,“P;§°g °'“* In test for determining the number of persons which a boat. or pon- '*"" °°”P“‘°“°”’· toon raft can accommo ate each person shall be assumed to be an adult person wearing a life jacket. In verifications of freeboard the pontoon boats shall be loaded with a weight of at least one hundred and sixty-ve ponmds for each adult person that the pontoon boat is authorized to carry. In all cases two children under twelve years of age shall be reckoned as one person. cvmc carscrrr or ommv Boxrs or um rmsr cnass. °°bi°“”‘°"" First. The cubic capacit of an open boat of type IA or IB shall be {List °l“° °°°° determined by Stirling's {Simpson s) rule or by any other method, approved by the Board of Supervising Inspectors,  the same de ee of accuracy. The capacity of a square-sterned boat shall be cagzrulated as if the boat had a pomted stern. Second. For example, the lclalpacity in cubic feet of a boat, calculated by the aid of Stirl1ng’ s e, may be considered as given by the following formula: Capacity =   (4A + 2B + 4C) 1 being the length of the boat in meters (or feet) from the inside of the planking or plating at the stem to the corresponding point at the stern post; in the case of a boat with a square stern, the ength is measured to the inside of the transom. _ A, B, C denote, res ectively, the areas of the cross sections at the quarter length forward, amidshigs, and the gluarter length aft, which correspond to the three points o tained by `viding l into four equal parts. (The areas corresponding to the two ends o the boat are considered negligible.) The areas A, B, C shall be deemed to be given in square feet by the successive application of the following formula to each of the three cross sections: Area=%(a+4b+2c+4d+e). h being the depth measured in meters (or in feet) inside the planking or plating from the keel to the level of the gnmwale, or, m certain cases. to a lower level, as determined hereafter.