(a) For ships less than 350 feet in length (L), the freeboard coefficient is P1 in the formula: P1=P + A[(L/D)-(L/Ds)] where P is a factor, which is a function of the length from table 1 and
``A'' is a coefficient, which is a function of length (L),
from table 2; L/D is the ratio of the length (L) to the depth
for freeboard (D); L/Ds is the ratio of the length
(L) to a standard depth (Ds) from table 3.
D is not to be used as less than that which will give a ration of L to D that is:
(a) More than 15 when L = 400 feet or less, or
(b) More than 21 when L = 700 feet or more, with the ratio for intermediate lengths being calculated proportionately.
(b) For ships 350 feet or more in length (L), the coefficient ``A'' is zero and the formula is: P1=P where P is a factor, which is a function of length from table (1).