[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: 46CFR185.610] [Page 313] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 185_OPERATIONS--Table of Contents Subpart F_Markings Required Sec. 185.610 Watertight doors and watertight hatches. Watertight doors and watertight hatches must be marked on both sides in clearly legible letters at least 25 millimeters (1 inch) high: ``WATERTIGHT DOOR--KEEP CLOSED'' or ``WATERTIGHT HATCH--KEEP CLOSED'', unless such markings are deemed unnecessary by the cognizant OCMI.