33 CFR §155.240

1. (a)Owners or operators of oil tankers and offshore oil barges shall ensure that their vessels have prearranged, prompt access to computerized, shore-based damage stability and residual structural strength calculation programs.
2. (b)Vessel baseline strength and stability characteristics must be pre-entered into such programs and be consistent with the vessel's existing configuration.
3. (c)Access to the shore-based calculation program must be available 24 hours a day.
4. (d)At a minimum, the program must facilitate calculation of the following:
   1. (1)Residual hull girder strength based on the reported extent of damage.
   2. (2)Residual stability when the vessel's compartments are breached.
   3. (3)The most favorable off-loading, ballasting, or cargo transfer sequences to improve residual stability, reduce hull girder stresses, and reduce ground-force reaction.
   4. (4)The bending and shear stresses caused by pinnacle loads from grounding or stranding.