[Code of Federal Regulations]
[Title 46, Volume 2]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR58.01-50]

[Page 255]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 58_MAIN AND AUXILIARY MACHINERY AND RELATED SYSTEMS--Table of Contents
 
                   Subpart 58.01_General Requirements
 
Sec. 58.01-50  Machinery space, noise.

    (a) Each machinery space must be designed to minimize the exposure 
of personnel to noise in accordance with IMO Assembly Resolution 
A.468(XII), Code on Noise Levels on Board Ships, 1981. No person may 
encounter a 24-hour effective noise level greater than 82 dB(A) when 
noise is measured using a sound-level meter and an A-weighting filter.
    (b) Except as allowed by paragraph (c) of this section, no machinery 
space may exceed the following noise levels:
    (1) Machinery control room--75 dB(A)
    (2) Manned machinery space--90 dB(A)
    (3) Unmanned machinery space--110 dB(A)
    (4) Periodically unattended machinery space--110 dB(A)
    (5) Workshop--85 dB(A)
    (6) Any other work space around machinery--90 dB(A)
    (c) If adding a source of noise would cause a machinery space to 
exceed the noise level permitted by paragraph (b) of this section, the 
new source must be suitably insulated or isolated so that the space does 
not exceed that noise level. If the space is manned, a refuge from noise 
must be provided within the space.
    (d) Ear protection must be provided for any person entering any 
space with a noise level greater than 85 dB(A).
    (e) Each entrance to a machinery space with a noise level greater 
than 85 dB(A) must have a warning sign stating that each person entering 
the space must wear ear protection.

[CGD 83-043, 60 FR 24776, May 10, 1995]