(a) Except as required in paragraph (c) of this section, the minimum freeboard in summer for a type A vessel is F in the following formula modified by the corrections in this subpart:
F (inches) = 10.2 × P1 × D
where P1 is defined in §45.55 and D is the depth for freeboard in feet.
(b) Except as required in paragraph (c) of this section, the minimum freeboard in summer for a type B vessel is F in the formula modified by the corrections in this subpart:
F (inches) = 12 × P1 × D
where P1 is defined by §45.55 and D is the depth for freeboard in feet.
(c) Seasonal freeboards assigned under §§45.71 through 45.75 must be calculated on the basis of the summer freeboard calculated under paragraph (a) or (b) of this section.
(d) If a minimum freeboard is required for a vessel under this part which is greater than that required by paragraph (a) or (b) of this section because of scantling or subdivision requirements, the summer freeboard and the seasonal freeboards assigned under this subpart must be no less than that minimum freeboard, except the midsummer seasonal freeboard may be calculated on the basis of the summer freeboard assigned under this paragraph.
(e) If a greater than the calculated minimum freeboard is requested by the applicant for the load line certificate, that greater freeboard may be assigned as the summer freeboard and—
(1) The intermediate and winter seasonal freeboards assigned must be calculated under paragraph (a) or (b) of this section; and
(2) The midsummer seasonal freeboard must be calculated on the basis of the summer freeboard assigned under this paragraph.
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