from being measured and comprised in gross tonnage if means are provided for closing such a break, opening or openings, so that the spaces thus closed in be thereby better fitted for the transport of goods or passengers. The upper deck is the uppermost full length deck ex- tending from stem to stern. 7. In the case of a vessel having a "trunk" or "turret", the deck forming the covering of the trunk or turret shall be considered the upper deck, and all spaces below that deck within the trunk or turret shall be considered as covered and closed in. The space within the turret or trunk shall be measured as are other between-deck spaces. 8. Spaces considered as "permanently closed in" and spaces per- mitted to be exempted from measurement shall be determined solely by the provisions contained in these rules, and not by any definitions or provisions contained in the measurement rules or regulations of any country. SPACES EXEMPTED FROM MEASUREMENT AND GROSS TONNAGE Sprceseas"emPet 9. ART . IV. The following spaces shall be exempted from measure- and gross tonnage. ment and shall not be included in the gross tonnage, and no other spaces shall be exempted: Upper deck, etc. 10. SECTION 1. Spaces on or above the upper deck not permanently covered or closed in, or which may not be readily covered or closed in. In the application of this rule it will be understood that- (a) Spaces under decks or coverings having no other connection with the body of the ship than the stanchions necessary for their sup- port are not spaces separated off, but are spaces permanently exposed to the weather and the sea and are not to be included in the gross tonnage. (b) A space within a poop, forecastle, bridge house, or other "permanently covered and closed-in" superstructure or erection may be considered as not permanently covered or closed-in, and may consequently be excluded from tonnage, if the space is opposite an end opening which is not provided with means of closing, and which opening has a breadth equal to or greater than half the breadth of the deck at the line of the opening, and if the space opposite the opening cannot be used to shelter other merchandise than cargo or stores that do not require protection from the sea. If the opening is fitted with a coaming, the space within it is to be included m the gross tonnage if the coaming is more than 2 feet in height. This provision shall be so applied as to exempt from measurement only the space between the actual end opening and a line drawn parallel to the line or face of the opening at a distance from the opening equal to one-half the width of the deck at the line of the opening; provided, that any closed-in space between the open face and the line drawn parallel to it shall be meas- ured. The remainder of the space within a poop, forecastle, bridge house, or other superstructure or erection shall be considered as availa- ble for the accommodation of cargo or stores, of passengers or of the ship's personnel, and shall be measured and included in the gross Post, . 375 tonnage. (See figs. 1, 2, and 3.) Should the open space within a poop, forecastle, bridge house, superstructure, or erection between the end opening and a parallel line distant from the opening by half the breadth of the deck become, because of any arrangement, except by convergence of fore and aft bulkheads, of less width than half the breadth of the deck, then only the space between the line of the end opening and a parallel line drawn through the point where the athwartship width of the open space within the poop, forecastle, bridge house, superstructure, or erection becomes equal to, or less than, half the breadth of the deck shall be Post, pp . 375 -37 exempted from measurement. (See figs. 4, 5, 6, and 7.) The remain- 374 PROCLAMATIONS, 1937
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