[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR182.480]

[Page 281]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 182--MACHINERY INSTALLATION--Table of Contents
 
               Subpart D--Specific Machinery Requirements
 
Sec. 182.480  Flammable vapor detection systems.

    (a) A flammable vapor detection system required by Sec. 182.410(c) 
must meet UL Standard 1110, ``Marine Combustible Gas Indicators,'' or be 
approved by an independent laboratory.
    (b) Procedures for checking the proper operation of a flammable 
vapor detection system must be posted at the primary operating station. 
The system must be self-monitoring and include a ground fault indication 
alarm.
    (c) A flammable vapor detection system must be operational for 30 
seconds prior to engine startup and continue sensing the entire time the 
engine is running.
    (d) A flammable vapor detection system must provide a visual and 
audible alarm at the operating station.
    (e) A sensor must be located above the expected bilge water level in 
the following locations:
    (1) The lowest part of a machinery space;
    (2) The lowest part of a space containing a fuel tank when separate 
from the machinery space; and
    (3) Any other location when required by the cognizant OCMI.
    (f) A flammable vapor detection system must be installed so as to 
permit calibration in a vapor free atmosphere.
    (g) Electrical connections, wiring, and components for a flammable 
vapor detection system must comply with part 183 of this chapter.
    (h) An operation and maintenance manual for the flammable vapor 
detection system must be kept onboard.