Page:United States Statutes at Large Volume 51.djvu/378

 required for the admission of light and air to the extent that such light and air and funnel spaces are below the deck or covering of the first or lowest tier of such side-to-side erections on the upper deck. There shall be exempted from the measurement of any superstructure or erection situated above the first or lowest tier of side-to-side erections on the upper deck such portion or portions thereof as are occupied by the spaces framed in round the funnels or by the spaces required for the admission of light and air into the engine rooms. Such exempted spaces must not be used for any other than their designated purpose and must be reasonable in extent. 13. SEC. 4. Space or spaces between the inner and outer plating of Spacebetweeninner the double bottom of a vessel shall be exempted from measurement, double bottom. except when used, designated or intended for carrying cargo; but the tonnage of such spaces within the double bottom as are or may be used for carrying cargo, shall be determined and included in the gross tonnage. The tonnage of double bottom tanks available for cargo may be obtained by multiplying the liquid-capacity weight by the proper conversion factor to get tons of 100 cubic feet. 14. SEC. 5. The cubical contents of hatchways shall be obtained by tuhbcay constent of multiplying the length and breadth together and the product by the nation of. mean depth taken from the top of beam to the underside of the hatch cover. From the aggregate tonnage of the hatchways there shall be deducted one-half of 1 percent of the vessel's gross tonnage, exclusive of hatchways, and only the remainder shall be added to the gross tonnage of the ship, exclusive of the tonnage of the hatchways. 15. SEC. 6. Companion houses shall be exempted when used solely Companion hous. to protect stairways and ladders leading to spaces below. When used as smoking rooms or for any other purposes than companion houses, the parts so used shall be measured and included in gross tonnage. 16. SEC. 7. Domes, skylights, and airshafts shall be exempt from Domes skylights measurement. When there is an opening in the floor of a superstruc- ture immediately below a skylight, the exemption shall include the space between the skylight and the opening in the floor of the super- structure immediately under the skylight. The remainder of the superstructure shall be included in the measurement. The space, in addition to the skylight, that may be exempted by this rule is that indicated by A, B, C, D in the following drawings: FIGURfI 12.-Open spaces between skylight and opening. 17. ART. V. (This section was eliminated on recommendation of Special Committee on Panama Canal Tolls and Vessel Measurement Rules, 1936.) SPACES AVAILABLE FOR PASSENGERS NOT TO BE EXEMPTED 18. ART. VI. Spaces for the use or possible use of passengers shall not be exempted from measurement except as stated in Article IV, section 1, paragraph (a). 19. In case of Army and Navy transports, colliers, supply ships, and hospital ships as defined in article I, the term "passengers" shall include all officers, enlisted men, and other persons who are not as- signed to duty and who are not duly inscribed on the ship's rolls. Spaces available for passengers not to be exempted, exception. Ante, p. 374. "Passengers", term construed. 377 PROCLAMATIONS, 1937

�