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April, 1914 Class II (partially collapsible sides): A Open. Upper part of sides col- lapsible. B Pontoon. Well deck; collapsible watertight bulwarks. Flush deck; collapsible watertight bulwarks. Motor boats may be accepted if they comply with the requirements laid down for boats of the first class, but only to a limited number, which 'number shall be determined by each government in its own regulations. No boat may be approved the buoy- ancy of which depends upon the pre- vious adjustment of one of the principal parts of the hull, or which has not a cu- bic capacity of at least 125 cubic feet. The standard types of boats of the first class (Article XXVIII of the regulations) must satisfy the follow- ing conditions :-- 1A. Open boats with internal buoy- ancy only. The buoyancy of a wooden boat of this type shall be provided by wa- tertight air-cases, the total volume of which shall be at least equal to one-tenth of the cubic capacity of the boat. The buoyancy of a metal boat of this type shall not be less than that required above for a wooden boat of the same cubic capacity, the volume of watertight air-cases being increased accordingly. 1B. Open boats. C Pontoon. with internal and External Buoyancy The internal buoyancy of a wooden boat of this type shall be provided by watertight air-cases, the total vol- ume of which is at least equal to 744 per cent of the cubic capacity of the boat. The external buoyancy may be of cork or of any other equally efficient material, but such buoyancy shall not be secured by the use of rushes, cork shavings, loose granulated cork or any other loose granulated substance, or by any means dependent upon in- Hation by air. If the buoyancy is of cork, its vol- ume, for a wooden boat, shall not be less than thirty-three thousandths of the cubic capacity of the boat; if of any material other than cork, its vol- ume and distribution shall be such that the buoyancy and stability of the boat are not less than that of a sim- ilar boat provided with buoyancy of cork, The buoyancy of a metal boat shall be not less than that required above for a wooden boat of the same cubic Capacity, the volume of the air-cases and external buoyancy being increased accordingly. 1C. Pontoon boats, in which persons c THE MARINE REVIEW cannot be accommodated below the deck, having a well deck and fixed watertight bulwarks. The area of the well deck of a boat of this type shall be at last 30 per cent -of the total deck area. The height of the well deck above the wa- ter line at all points shall be at least equal to one-half per cent of the length of the boat, this height being increased to 1% per cent of the length of the boat at the ends of the well. The freeboard of a boat of this type shall be such as to provide for a re- serve buoyancy of at least 35 per cent. The standard types of boats of the second class (Article XXIX: of the regulations) must satisfy the following conditions: 2A. Open boats having the upper. part of the sides collapsible. A boat of this type shall be fitted both with watertight air-cases and with external buoyancy, the vqlume of which, foreach person which the boat is able to accommodate, shall be at least equal to the following amounts: Cu. ft. Ale Casts a ee 15 External buoyancy (if of cork). 0.2 The minimum freeboard of boats of this type is fixed in relation to their length; it is measured vertically to the top of the solid hull at the side amidships, from the water level when the boat is loaded. The freeboard in fresh water shall not be less than the following amounts :-- ; Min. freeboard. Length of boat..26 ft. 8 in. Length of boat..28 ft. 9 in. 'Length of boat..30 ft. 10 in. 2B. Pontoon boats having a well deck and collapsible bulwarks. All the conditions laid down for boats of type 1C are to be applied to boats of this type, which differs from those of type 1C only in regard to the bulwarks. 2C. Pontoon boats, in which the per- sons cannot be accommodated below deck, having a flush deck and collapsible bulwarks. The minimum freeboard of boats. of this type is independent of their length and depends only upon their depth. The depth of the boat 4a: 10 be measured vertically from the under- side of the garboard strake to the top of the deck at the side amidships, and the freeboard is to be measured from the top of the deck at the side amidships to the water level when the boat is loaded. The freeboard in fresh water shall not be less than the following amounts, which are applicable without correction to boats having a mean 159 sheer equal to 3 per cent of their 'ength: Min. freeboard. Depth of boat...12 in. 234 in. Depth of boat...18 in. 334 in, Depth of boat...24 in. 5% in. 'Depth of boat...30 in. 6% in. If the sheer is less than the stand- ard sheer defined above, the minimum freeboard is obtained by adding to the figures in the table one-seventh of the difference between the standard sheer and the actual mean sheer meas- ured at the stem and stern post; no deduction is to be made from the free- board on account of the sheer being greater than the standard sheer or on account of the camber of the deck. Must Be Safely Lowered Each boat must be of sufficient strength to enable it to be safely low- ered into the water when loaded with its full complement of persons and equipment. Any type of boat may be accepted as equivalent to a boat of one of the prescribed classes, and any type of raft as equivalent to an ap- proved pontoon-raft, if such types satisfy the administration concerned. When motor boats are accepted the volume of internal buoyancy, and, when fitted, the external buoyancy, must be fixed, having regard to the difference between the weight of the motor and its accessories and the weight of the additional persons which the boat could accommodate if the motor and its accessories were re- moved. All pontoon lifeboats shall be fitted with efficient means for quickly clearing the deck of water. The or- ifices for this purpose shall be such that the water cannot enter the boat through them when they are _inter- mittently submerged. The number and size of the orifices shall be deter- mined for each type of boat by a special test. For the purpose of this test the pontoon boat shall be loaded with a weight of iron equal to that of its complement of. persons and equipment. In the case of a boat 28 ft. long two tons of water shall be cleared from the boat in a time not exceeding 60 seconds for boats of type IC, 60 seconds for type 2B, and 20 seconds for type 2C. Boats of other lengths than 28 ft. shall be cleared in a _ proportion- ate time. Article XXXIII of the regulations states that no type of pontoon raft may be approved unless it satisfies the following conditions :-- 1. It should be reversible and fitted with bulwarks of wood, canvas or. other suitable material on both sides. These bulwarks may be collapsible. 2. It should be of such Size,