[Code of Federal Regulations] [Title 33, Volume 1] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 33CFR117.140] [Page 551] TITLE 33--NAVIGATION AND NAVIGABLE WATERS CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY PART 117_DRAWBRIDGE OPERATION REGULATIONS--Table of Contents Subpart B_Specific Requirements Sec. 117.140 General. In California, when fog prevails by day or night, the drawtender, after sounding the opening signal, shall toll a bell continuously during the approach and passage of a vessel.