[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: 46CFR174.080] [Page 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. 174.080 Flooding on self-elevating and surface type units. (a) On a surface type unit or self-elevating unit, all compartments within 5 feet (1.5 meters) of the hull of the unit between two adjacent main watertight bulkheads, the bottom shell, and the uppermost continuous deck or first superstructure deck where superstructures are fitted must be assumed to be subject to simultaneous flooding. (b) On the mat of a self-elevating unit, all compartments of the mat must be assumed to be subject to individual flooding.