[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR172.225]

[Page 156]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 172--SPECIAL RULES PERTAINING TO BULK CARGOES--Table of Contents
 
   Subpart H--Special Rules Pertaining to Great Lakes Dry Bulk Cargo 
                                 Vessels
 
Sec. 172.225  Calculations.

    (a) Each vessel must be shown by design calculations to meet the 
survival conditions in Sec. 172.245 in each condition of loading and 
operation, assuming the damage specified in Sec. 172.230.
    (b) When doing the calculations required by paragraph (a) of this 
section, the virtual increase in the vertical center of gravity due to a 
liquid in a space must be determined by calculating either--
    (1) The free surface effect of the liquid with the vessel assumed 
heeled five degrees from the vertical; or
    (2) The shift of the center of gravity of the liquid by the moment 
of transference method.
    (c) In calculating the free surface effect of consumable liquids, it 
must be assumed that, for each type of liquid, at least one transverse 
pair of wing tanks or a single centerline tank has a free surface. The 
tank or combination of tanks selected must be those having the greatest 
free surface effect.
    (d) When doing the calculations required by paragraph (a) of this 
section, the buoyancy of any superstructure directly above the side 
damage must not be considered. The unflooded parts of superstructures 
beyond the extent of damage may be considered if they are separated from 
the damaged space by watertight bulkheads and no progressive flooding of 
these intact spaces takes place.