U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 46Chapter IPart 45Subpart C - Subpart C—Freeboards
View all text of Subpart C [§ 45.51 - § 45.77]
§ 45.71 - Midsummer freeboard.

The minimum midsummer freeboard (fms) in inches is obtained by the formula:

fms = f(s) − 0.3Ts where: f(s) = summer freeboard in inches Ts = distance in feet between top of keel and the summer load line.
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