[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: 46CFR167.40-5] [Page 15-16] TITLE 46--SHIPPING CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED) PART 167_PUBLIC NAUTICAL SCHOOL SHIPS--Table of Contents Subpart 167.40_Certain Equipment Requirements Sec. 167.40-5 Alarm bells. All nautical school ships over 100 gross tons shall have all sleeping accommodations, public spaces, and machinery spaces equipped with a sufficient number of alarm bells so located [[Page 16]] as to warn all occupants. The system shall operate from a continuous source of electric energy capable of supplying the system for a period of at least 8 hours without being dependent upon the main, auxiliary or emergency generating plants. Each bell shall produce a signal of a tone distinct from that of other bell signals in the vicinity and shall be independently fused, with each of these fuses located above the bulkhead deck. The bells shall be controlled by a manually-operated contact maker located in the pilothouse. The characteristics of the contact maker shall be such that it possesses: (a) Positive contact; (b) Watertightness (when located in open spaces subject to weather); (c) Means whereby its electrically open or closed position can be determined by sense of touch; (d) Means to affect a make-or-break circuit for signaling; and (e) Self-maintaining contacts.