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:
Breadth of hatchway or trunk in relation to the breadth of ship | Area of freeing ports in relation to the total area of the bulwarks (percent) |
40 percent or less | 20 |
75 percent or more | 10 |
The area of freeing ports at intermediate breadths must be obtained by linear interpolation.
46 C.F.R. §45.121