where-
K = 0.3 for river service.
K = 0.4 for lakes, bays and sounds and Great Lakes summer service.
K = 0.5 for ocean and Great Lakes winter service.
B = beam in feet (meters).
fe = effective freeboard in feet (meters).
fe = f + fa ; or
fe = d, whichever is less.
where-
f = the freeboard to the deck edge amidships in feet (meters).
fa = (1.25)(a/L)((2b/B)-1)(h); or
fa = h, whichever is less.
where-
a = trunk length in feet (meters).
L = LOA in feet (meters)
b = breadth of a watertight trunk in feet (meters).
B = beam of the barge in feet (meters).
h = height of a watertight trunk in feet (meters).
d = draft of the barge in feet (meters).
46 C.F.R. §172.090