46 C.F.R. § 45.71
Midsummer freeboard.
Cite as 46 C.F.R. § 45.71 (2026)
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.