[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR174.035]

[Page 170]
 
                           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. 174.035  Definitions.

    (a) For the purpose of this subpart the following terms have the 
same definitions as given in Subchapter IA of this chapter:
    (1) Column stabilized unit.
    (2) Mobile offshore drilling unit.
    (3) Self-elevating unit.
    (4) Surface type unit.
    (b) For the purpose of this subpart--
    (1) Downflooding means the entry of seawater through any opening 
that cannot be rapidly closed watertight, into the hull, superstructure, 
or columns of an undamaged unit due to heel, trim, or submergence of the 
unit.
    (2) Downflooding angle means the static angle from the intersection 
of the unit's centerline and waterline in calm water to the first 
opening through which downflooding can occur when subjected to a wind 
heeling moment (Hm) calculated in accordance with Sec. 174.055.
    (3) Normal operating condition means a condition of a unit when 
loaded or arranged for drilling, field transit, or ocean transit.
    (4) Severe storm condition means a condition of a unit when loaded 
or arranged to withstand the passage of a severe storm.