{"data":{"id":"us/46-cfr-171.057","jurisdiction":"us","citation":"46 CFR 171.057","heading":"Intact stability requirements for a sailing catamaran.","body":"(a) A sailing vessel that operates on protected waters must be designed to satisfy the following equation:\nWhere—\nB = the distance between hull centerlines in meters (feet).\nAs = the maximum sail area in square meters (square feet).\nHc = the height of the center of effort of the sail area above the deck, in meters (feet).\nW = the total displacement of the vessel, in kilograms (pounds).\nX = 4.88 kilograms/square meter (1.0 pounds/square foot).\n(b) A sailing vessel that operates on partially protected or exposed waters must be designed to satisfy the following equation:\nWhere—\nB = the distance between hull centerlines in meters (feet).\nAs = the maximum sail area in square meters (square feet).\nHc = the height of the center of effort of the sail area above the deck, in meters (feet).\nW = the total displacement of the vessel, in kilograms (pounds).\nX = 7.32 kilograms/square meter (1.5 pounds/square foot).","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER S—SUBDIVISION AND STABILITY","PART 171—SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS","Subpart B—Intact Stability"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-46.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:22Z","sha256":"dcc9930bce30d6ee392faed5b5dff2d3eb440b497df11b6bfd2f192ac12d86db","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-171.055","next":"us/46-cfr-171.060"},"notice":"GroundRules: Original legal text. Not legal advice."}