[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: 46CFR197.450]

[Page 435]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 197--GENERAL PROVISIONS--Table of Contents
 
                 Subpart B--Commercial Diving Operations
 
Sec. 197.450  Breathing gas tests.

    The diving supervisor shall insure that--
    (a) The output of each air compressor is tested and meets the 
requirements of Sec. 197.340 for quality and quantity by means of 
samples taken at the connection point to the distribution system--
    (1) Every 6 months; and
    (2) After every repair or modification.
    (b) Purchased supplies of breathing mixtures supplied to a diver are 
checked before being placed on line for--
    (1) Certification that the supply meets the requirements of 
Sec. 197.340; and
    (2) Noxious or offensive odor and oxygen percentage;
    (c) Each breathing supply system is checked, prior to commencement 
of diving operations, at the umbilical or underwater breathing apparatus 
connection point for the diver, for noxious or offensive odor and 
presence of oil mist; and
    (d) Each breathing supply system, supplying mixed-gas to a diver, is 
checked, prior to commencement of diving operations, at the umbilical or 
underwater breathing apparatus connection point for the diver, for 
percentage of oxygen.