PROCLAMATIONS, 1937 Rule for measure- ment of open vessels. RULE III. FOR MEASUREMENT OF OPEN VESSELS 38. SEC. 9. In ascertaining the tonnage of open ships, the upper edge of the upper strake of the shell plating is to form the boundary line of measurement, and the depths shall be taken from an athwart- ship line, extended from upper edge to upper edge of the said strake at each division of the length. DEDUCTIONS FROM THE GROSS TONNAGE TO ASCERTAIN THE NET TONNAGE (A) DEDUCTIONS ALLOWED FOR ALL VESSELS Deductions from 39. ART . X. The following spaces (enumerated below in secs. 1 to 11 gross tonnage to ascer- tain net tonnage. of this article) shall be deducted from the gross tonnage in order to Pest, p. 383 . ascertain the net tonnage of vessels not propelled by engines, and no other spaces shall be deducted. These deductions will also be allowed for vessels propelled by engines, with additional deductions for vessels propelled by engines, listed under (B) article XII. Unless otherwise expressly stipulated, these spaces shall be deducted whether located above or below the upper deck. Ascertainment of 40. The volume or cubical contents of deducted spaces shall be tentoumeoreubdcact ascertained in the manner specified in article VIII or article IX of spacs; remainder. these rules. The remainder, resulting from deducting from the total space included in gross tonnage the sum of the cubical contents of the spaces whose deduction from gross tonnage is permitted by these rules, shall be the Panama Canal net tonnage of vessels upon which tolls and other charges based upon net tonnage shall be paid by vessels of commerce, Army and Navy transports, colliers, supply ships, and Ante, p. 373. hospital ships (as defined in art. I) for passage through the Panama Canal. One hundred cubic feet, or 2.83 cubic meters, shall constitute 1 gross or net ton. Passenger spaces. 41. Spaces for the use, or possible use, of passengers (as defined in Ante, p. 377. art. VI) shall not be deducted from the gross tonnage, except in so far as their deduction may be specifically provided for in the following sections (1 to 11) of this article of these rules. Army and Navy DEFINITION OF STORES AND CARGO CARRIED ON ARMY AND NAVY transports, collCers, etc. TRANSPORTS, COLLIERS, SUPPLY SHIPS, AND HOSPITAL SHIPS Definition of stores and cargo carried. Ante, p. 373. 42. Spaces available for the stowage of stores (other than boat- swain's stores) or cargo shall not be deducted from gross tonnage. In case of Army and Navy transports, colliers, supply ships, and hospital ships, as defined in article I, the term "stores (other than boatswain's stores) or cargo" shall include, in addition to goods or cargo ordinarily carried as freight on vessels of commerce, the following articles: (a) On transports, food, stores, luggage, accouterments, and equip- ment for passengers. (b) On colliers, coal, coaling gear, and fuel oil not for the use of the colliers. (c) On supply ships, stores, supplies of all kinds, distilling machinery and distilled water (other than fresh water stored in peak tanks for the vessels own use), machines, tools and material for repair work, mines and mining material, torpedoes, arms, and ammunition. (d) On hospital ships, food stores for passengers, medical stores, and hospital equipment. (e) Guns mounted on transports and supply ships, for defense of the ships, and ammunition required for use in such guns shall not be classed as cargo. 382
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