are supplied by the sailmaker, the measurer shall check them by measuring the following: Boom, from lower end of A to lower end of D. Gaff or lug yard, — from upper end of A to forward end of B. Club Topsail, - sheet to outer lacing-hole. In cases where it is necessary for the official measurer to measure the sails, he shall do so in the following manner: Take the length of boom from mast to pin of sheave for outhaul, and length of gaff from mast to pin of topsail sheet sheave or lacing-hole, as the case may require; then hoist the sail with the tack fast and set the peak and luff up taut, and let go the topping lifts so that the weight of the boom comes on the leach of the sail. With a line and tape, measure the leach and luff and the diagonal C. For the headsail measure the height I and the distance J, as provided for in the section dealing with headsail. For topsail the sail should be hoisted and marked in a line with the gaff; then lowered and the other dimensions taken. From the measurements so taken a sail plan should be made and the other above-specified measurements obtained therefrom. CALCULATION OF SAIL AREAS. Mainsail. Multiply A by B and C by D, and add the two products together and divide by 2. Yard Topsail.-Multiply E by F and G by H, and add the two products together and divide by 2. Jib Header. — Multiply K by L and divide by 2. Headsails. — Multiply I by J and divide by 2. Lugsails and Headsails. - No deduction is to be made from headsail area on the score of any portion of the lugsail area ahead of the mast. Sails Bounded by Curved Edges. — Any increase in the area of sails due to curved edges, extended by battens, or otherwise, beyond the line between the points for measurement, shall be computed as follows: Multiply the base E by two-thirds of the perpendicular P. Displacement. D. Displacement to be obtained as follows: At points dividing the length of the load water line into five equal parts, find areas of immersed cross sections in square feet; from the areas in square feet obtained and load water line length, find approximate displacement in cubic feet, which will be the D in formula. Limit of L.W.L.— One half (1) of any excess of L. W.L. over one hundred and fifteen per cent (115%) of L shall be added to the rating measurement. The L.W.L. shall be the distance in a straight line between the points farthest forward and farthest aft, where the hull, exclusive of the rudder post, is intersected by the surface of the water when the yacht is afloat, in racing trim. Limit of Draught. measurement) + 2.66. Limit of draught in feet.133 (rating Any excess of draught, exclusive of centre-board, as per above formula, shall be multiplied by five (5) and added to the rating measurement. The draught of any vessel, exclusive of centre-board, shall not exceed eighteen (18) feet. Limit of Sail Area. - Any excess of the square root of sail area over one hundred and thirty-five per cent (135%) of I shall be added to the rating measurement. All measurements of hull shall be taken with only such persons on board as shall be required by the measurer. All measurements specified may be certified to by the designer, in a certificate to be filed with the measurer of the club, but such certificate must be accompanied by drawings, showing the measurements taken, and the true line of flotation of the vessel when measured in racing trim, which measurement and line of flotation must be verified by the measurer, before any certificate of measurement shall be accepted by the secretary. If from any peculiarity in the build of a yacht, or other cause, the measurer shall be of opinion that the rule will not rate the yacht fairly, or that in any respect she does not comply with the requirements of these rules, he shall report the circumstances to the Regatta Committee, who, with the measurer, after due inquiry, shall award such a certificate of rating as they may consider equitable, and the measurement shall be deemed incomplete until this has been done. CLASSIFICATION. Schooners. - Class A. All over 100 feet, rating measurement. Class B. Not over 100 feet and over 80 feet, rating measurement. Class C. Not over 80 feet and over 64 feet, rating measure ment. Class D. Not over 64 feet and over 51 feet, rating measurement. Class E. Not over 51 feet, rating measurement. Single-masted Vessels and Yawls. Class F. 100 feet, rating measurement. All over Class G. Not over 100 feet and over 80 feet, rating measurement. Class H. Not over 80 feet and over 64 feet, rating measurement. Class I. Not over 64 feet and over 51 feet, rating measure ment. Class J. Not over 51 feet and over 40 feet, rating measurement. Class K. 40 feet and under, rating measurement. Sails. - Yachts in races may carry the following sails : — Schooners. Mainsail, foresail, fore staysail, jib, flying-jib, jib-topsail, fore and main gaff topsail, maintopmast staysail, and spinnaker. Sloops and Cutters. Mainsail, fore staysail, jib, flyingjib, jib-topsail, gaff topsail, and spinnaker. Yawls. staysail. - Same as sloops and cutters, with mizen and mizen Balloon Sails. - Yachts may set light sails over working sails. Boats and Life-Buoys. - All yachts shall carry at least two serviceable life-buoys on deck ready for use. Classes A and B of schooners, and F and G of single-masted vessels and yawls, shall carry on deck a serviceable round-bottom boat, not less than 14 feet in length; and classes C and D of schooners, and H and I of single-masted vessels and yawls, a boat as above, not less than 12 feet in length; and in classes E of schooners, and J and K of single-masted vessels and yawls, a boat as above, not less than 10 feet in length. All boats to have oars and rowlocks or tholepins lashed in. All Bulkheads, Ballast, etc. - Floors must be left down and bulkheads and doors left standing; water-tanks kept in place, and at least one bower anchor and cable kept on board. yachts, except in classes A of schooners and G of single-masted vessels and yawls, shall keep their galley fixtures and fittings on board and in their proper places. Trimming by dead-weight shall not be allowed after the preparatory signal. Neither ballast nor water shall be taken in or discharged after 9 P.M. of the day before a race, but the above restriction may be waived as to water, only by permission. Crew. The number of men permitted on a yacht during a race shall not exceed that given by the following table: Classes A and F. One man for every 250 square feet of sail area, or fraction thereof. Classes B, C, D, E, G, H, I, J, and K. One man for every 300 square feet of sail area, or fraction thereof. BUILDERS' OLD MEASUREMENT TONNAGE. This tonnage, commonly called B. O. M., is still much in Vogue with yacht builders, but obsolete otherwise. where L is the length of vessel measured along top of keel from after side of stern post, to the intersection of a perpendicular with the fore part of stem under the bowsprit, and B is the extreme breadth to outside of planking, exclusive of doublings. THAMES MEASUREMENT TONNAGE. This rule was formulated by the Royal Thames Yacht Club, and is much used for the measurement of yachts. where L is the length measured in a straight line at the deck from the fore part of stem to the after part of stern post, and B is the extreme breadth to outside of planking. Antimony Anthracite coal, broken, cubic foot averages Apple wood Bitumastic solution per gallon Bituminous coal, broken, cubic foot averages Box wood Brick, best pressed Brick, common hard. Brick, soft inferior Brickwork, pressed brick Brickwork, ordinary. Brass, common Brass, wire. Bronze POUNDS 44.4 34.6 160 168 478 107 417 54 49.5 0.08 39 156 65 38 170 456 43.8 502.5 33 608 49 62.5 150 125 100 140 112 525-530 533 544 |