[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: 46CFR174.065]

[Page 172-173]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 174--SPECIAL RULES PERTAINING TO SPECIFIC VESSEL TYPES--Table of Contents
 
  Subpart C--Special Rules Pertaining to Mobile Offshore Drilling Units
 
Sec. 174.065  Damage stability requirements.

    (a) Each unit must be designed so that, while in each of its normal 
operating conditions and severe storm conditions, its final equilibrium 
waterline would remain below the lowest edge of any opening through 
which additional flooding could occur if the unit were subjected 
simultaneously to--
    (1) Damage causing flooding described in Secs. 174.075 through 
174.085; and
    (2) A wind heeling moment calculated in accordance with 
Sec. 174.055(b) using a wind velocity of 50 knots (25.8 meters per 
second).
    (b) Each unit must have a means to close off each pipe, ventilation 
system, and trunk in each compartment described in Sec. 174.080 or 
Sec. 174.085 if any portion of the pipe, ventilation system, or

[[Page 173]]

trunk is within 5 feet (1.5 meters) of the hull.