[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: 46CFR171.108] [Page 139] 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 D_Additional Subdivision Requirements Sec. 171.108 Manholes in double bottoms. (a) The number of manholes in the inner bottom of a double bottom required by Sec. 171.105 must be reduced to the minimum required for adequate access. (b) Each manhole must have a cover that can be-- (1) Made watertight; and (2) Protected from damage by cargo or coal.