[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: 46CFR171.068]

[Page 129-130]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 171--SPECIAL RULES PERTAINING TO VESSELS CARRYING PASSENGERS--Table of Contents
 
                        Subpart C--Large Vessels
 
Sec. 171.068  Special considerations for Type I subdivision for vessels on short international voyages.

    (a) The calculations done to demonstrate compliance with 
Sec. 171.065 for a vessel that makes short international voyages and is 
permitted under Sec. 75.10-10 of this chapter to carry a number of 
persons on board in excess of the lifeboat capacity must--
    (1) Assume the uniform average permeabilities given in Table 171.068 
in lieu of those in Table 171.066; and
    (2) Use a factor of subdivision (FS) that is the smaller of the 
following:
    (i) The value from Table 171.065(a).
    (ii) 0.50.

[[Page 130]]

    (b) For a vessel less than 300 feet (91 meters) in length, the 
Commanding Officer, Marine Safety Center may approve the separation of 
main transverse watertight bulkheads greater than that permitted by 
paragraph (a) of this section if--
    (1) The shorter separation is impracticable; and
    (2) The separation is the smallest that is practicable.
    (c) In the case of ships less than 180 feet (55 meters) in length, 
the Commanding Officer, Marine Safety Center may approve a further 
relaxation in the bulkhead spacing. However, in no case may the 
separation be large enough to prevent the vessel from complying with the 
flooding requirements for Type II subdivision in Sec. 171.070.

         Table 171.068--Table of Uniform Average Permeabilities
------------------------------------------------------------------------
                 Location                   Uniform average permeability
------------------------------------------------------------------------
                                            10 (a-c)
Machinery Space..........................  85+--------
                                            v
------------------------------------------
                                            35(b)
Volume Forward of Machinery Space........  95-----
                                            v
------------------------------------------
                                            35(b)
Volume Aft of Machinery Space............  95-------
                                            v
------------------------------------------------------------------------
For each location specified in this table--
a=volume below the margin line of all spaces that, in the full load
  condition, normally contain no cargo, baggage, stores, provisions, or
  mail.
b=volume below the margin line and above the tops of floors, inner
  bottoms, or peak tanks of coal or oil fuel bunkers, chain lockers,
  fresh water tanks, and of all spaces that, in the full load condition,
  normally contain stores, baggage, mail, cargo, or provisions. If cargo
  holds are not occupied by cargo, no part of the cargo space is to be
  included in this volume.
c=volume below the margin line of the cargo, stores, provisions, or mail
  spaces within the limits of the machinery space.
v=total volume below the margin line.


[CGD 79-023, 48 FR 51017, Nov. 4, 1983, as amended by CGD 88-070, 53 FR 
34537, Sept. 7, 1988]