View all text of Subpart B [§ 171.045 - § 171.057]

§ 171.057 - Intact stability requirements for a sailing catamaran.

(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]