{"data":{"id":"us/46-cfr-45.61","jurisdiction":"us","citation":"46 CFR 45.61","heading":"Correction for superstructures and trunks.","body":"(a) Where the effective length E of superstructures and trunks that meet the requirements of subpart D of this part is 1.0L, the minimum summer freeboard may be corrected by subtracting 1/2Hs.\n(b) Where the effective length of superstructures and trunks is less than 1.0L the minimum summer freeboard may be corrected by subtracting a percentage of one-half of the standard superstructure height (Hs) determined by the formula:\nPercentage = (E/2L) (1 + E/L) × 100\n(c) To be eligible for the correction a trunk must—\n(1) Be at least as strong and as stiff as a superstructure;\n(2) Have no opening in the freeboard deck in way of the trunk, except small access openings;\n(3) Have hatchway coamings and covers that meet §§ 45.143 through 45.147;\n(4) Provide a permanent working platform fore and aft with guardrails;\n(5) Provide fore and aft access between detached trunks and superstructures by permanent gangways;\n(6) Be at least 60 percent of the breadth of the ship in way of the trunk; and\n(7) Be at least 0.6 L in length, if no superstructure, is provided.","path":["Title 46—Shipping","CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY","SUBCHAPTER E—LOAD LINES","PART 45—GREAT LAKES LOAD LINES","Subpart C—Freeboards"],"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":"f45205d1b8d7fa79c97b2332c4b824e677de9e4c860dce70edb547265e973261","source_id":"us-cfr","stale":true,"prev":"us/46-cfr-45.59","next":"us/46-cfr-45.63"},"notice":"GroundRules: Original legal text. Not legal advice."}