Page:United States Statutes at Large Volume 47 Part 2.djvu/712

 2316 INTERNATIONAL LOAD LINE CONVENTION. JULY 6, 1930. Rule LII. -E'Mwsed SUpeTstrw:lur6 wiJh, Middl6 Li'M Openings in tM dtck not Prouided with, Perma'Mnt Means oj Closing. Elleotive length, Where there is an enclosed superstructure with one or more having no permanent means or c108~. middle line opemngs' in the deck not provided with permanent A flU, p. 22'lO. AfIU, p. 2210. Antt, p. 2312. Deductions. means of closing (see Rules VIII to XVI), the effective length of the superstructure is determined as follows:- (1) Where efficient temporary closing appliances are not provided for the middle line deck openings (see Rule XLV), or the breadth of opening is 80 per cent. or more of the hreadth Bh of the superstructure deck at the middle of the opening, the ship is considered as having an open well in way of each opening, and freeing ports are to be provided in way of this well. The effective length of superstructure between openings is goveme<l by RUles XLVII, XLIX, and L. (2) Where efficient temporary closing appliances are provided for middle line deck openiIlgs and the breadth of opening is less than .8 Bh the effective length is ~vemed by Rules XLVII, XLIX, and LJ except that where access openings in 'tween deck Dulkheads are closed by Class 2 cloEling appliances, they are regarded as being closed by Class 1 closing appliances in determining the effective length. The total effective length is obtained by adding to the length determined by (1) the difference between this length and the length of the ship modified in the ratio of- B1 -b B-; - where b == breadth of deck opening; hBl-b. th 5" k w ere ~18greater an. ItIStaenas.5. Deductions Jor SUpeTstructuru. Rule LIII. -Ded'UClions Jor SUpeTl1Ir1.tdr.tr68. Where the effective length of BUperstructures is 1.0 L, the deduction from the freeboard is 14 inches at 80 feet length of ship, 34 inches at 280 feet length, and 42 inches at 400 fee& length and above; deductions at intermediate lengths are obtained by interpolation. Where the total effective length of superstructures is