[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 46CFR113.50-15]



[Page 273]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 113_COMMUNICATION AND ALARM SYSTEMS AND EQUIPMENT--Table of Contents

 

                  Subpart 113.50_Public Address Systems

 

Sec.  113.50-15  Loudspeakers.



    (a) Loudspeakers must be located to eliminate feedback or other 

interference which would degrade communication.

    (b) Loudspeakers must be located to provide intelligible and audible 

one-way communication throughout the vessel. Weatherdeck loudspeakers 

must be watertight and suitably protected from the effects of the wind 

and seas.

    (c) There must be a sufficient number of loudspeakers throughout the 

vessel. The public address system must be installed with regard to 

acoustically marginal conditions and not require any action from the 

addressee. With the vessel underway in normal conditions, the minimum 

sound pressure levels for broadcasting emergency announcements must be--

    (1) In interior spaces, 75 dB(A) or, if the background noise level 

exceeds 75 dB(A), then at least 20 dB(A) above maximum background noise 

level; and

    (2) In exterior spaces, 80 dB(A) or, if the background noise level 

exceeds 80 dB(A), then at least 15 dB(A) above maximum background noise 

level.

    (d) Loudspeakers must not have external volume controls or local 

cutout switches.



[CGD 74-125A, 47 FR 15272, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 

28291, June 4, 1996; 61 FR 36787, July 12, 1996]