46 C.F.R. § 171.057 Intact stability requirements for a sailing catamaran.
Title 46 - Shipping
(a) A sailing vessel that operates on protected waters must be designed to satisfy the following equation:
Where— B=the distance between hull centerlines in meters (feet). As=the maximum sail area in square meters (square feet). Hc=the height of the center of effort of the sail area above the deck, in meters (feet). W=the total displacement of the vessel, in kilograms (pounds). X=4.88 kilograms/square meter (1.0 pounds/square foot). (b) A sailing vessel that operates on partially protected or exposed waters must be designed to satisfy the following equation:
Where— B=the distance between hull centerlines in meters (feet). As=the maximum sail area in square meters (square feet). Hc=the height of the center of effort of the sail area above the deck, in meters (feet). W=the total displacement of the vessel, in kilograms (pounds). X=7.32 kilograms/square meter (1.5 pounds/square foot). [CGD 79–023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 83–005, 51 FR 924, Jan. 9, 1986; CGD 85–080, 61 FR 944, Jan. 10, 1996]
Title 46: Shipping
PART 171—SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS
Subpart C—Large Vessels
§ 171.057 Intact stability requirements for a sailing catamaran.
