TREATIES If of any material other than cork, its volume and distribution shall be such that the buoyancy and stability of the boat are not less than that of a similar boat provided with buoyancy of cork. A metal boat of this type shall be provided with internal and external buoyancy to ensure that the buoyancy of the boat shall be at least equal to that of a wooden boat. The minimum freeboard of boats of this type shall be fixed in rela- tion to their length; and it shall be 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:- Length of Lifeboat. Equivalent in Metres. Feet to- 790 26 8.50 28 9.15 30 Minimum Freeboard. Equivalent in Millimetres. Inches to- 200 8 225 9 250 10 The freeboard of boats of intermediate lengths is to be found by interpolation. The collapsible sides must be watertight. (b.) Decked Boats with either Fixed or Collapsible Watertight Bulwarks. (i.) Decked Boats having a Well Deck.- The area of the well deck of a boat of this type shall be at least 30 per cent. of the total deck area. The height of the well deck above the water-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 one-and-a -half 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 reserve buoyancy of at least 35 per cent. (ii.) Decked Boats having a Flush Deck.- The minimum freeboard of boats of this type is independent of their lengths and depends only upon their depths. The depth of the boat is to be measured vertically from the underside 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 sheer equal to three per cent. of their length:- Depth of Lifeboat. Minimum Freeboard. Equivalent in Equivalent in Millimetres. Inches to- Millimetres. Inches to- 310 12 70 2% 460 18 95 3% 610 24 130 5% 760 30 165 63 For intermediate depths the freeboard is obtained by interpolation. Decked boats, etc. 1232
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