46 C.F.R. § 45.121 Freeing port area: Changes for trunks and side coamings.
Title 46 - Shipping
If a vessel has a trunk and does not meet the requirements of §45.61 or has continuous or substantially continuous hatchway side coamings between detached superstructures, the minimum area of the freeing port openings must be obtained from the following table: The area of freeing ports at intermediate breadths must be obtained by linear interpolation.
Title 46: Shipping
PART 45—GREAT LAKES LOAD LINES
Subpart D—Conditions of Assignment
§ 45.121 Freeing port area: Changes for trunks and side coamings.
------------------------------------------------------------------------ Area of freeing ports in relation Breadth of hatchway or trunk in relation to the breadth of to the ship total area of the bulwarks (percent)------------------------------------------------------------------------40 percent or less........................................... 2075 percent or more........................................... 10------------------------------------------------------------------------
