[Code of Federal Regulations] [Title 46, Volume 4] [Revised as of October 1, 2002] From the U.S. Government Printing Office via GPO Access [CITE: 46CFR131.899] [Page 466] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED) PART 131--OPERATIONS--Table of Contents Subpart H--Markings for Fire Equipment and Emergency Equipment Sec. 131.899 Fire dampers. Each fire damper installed within the boundary of a space protected by a fixed fire extinguishing system must be fitted with an indicator showing whether the damper is open or closed and must be marked with red letters at least 13 millimeters (\1/2\-inch) high stating ``FIRE DAMPER'' and, as otherwise appropriate, identifying the space served by the fire damper.