[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: 46CFR197.434]

[Page 434]
 
                           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. 197.434  Surface-supplied mixed-gas diving.

    The diving supervisor shall insure that--
    (a) When mixed-gas diving is conducted, a decompression chamber or a 
closed bell meeting the requirements of Sec. 197.332 is ready for use 
at the dive location;
    (b) A diving stage is used except when a bell is provided;
    (c) A bell is used for dives deeper than 220 fsw or when the dive 
involves in-water decompression times greater than 120 minutes, except 
when the diver is using a heavy-weight diving outfit or is diving in a 
physically confining space;
    (d) A closed bell is used for dives at depths greater than 300 fsw, 
except when diving is conducted in a physically confining space;
    (e) A separate dive team member tends each diver in the water;
    (f) A standby diver is available during all nonsaturation dives;
    (g) When saturation diving is conducted--
    (1) A standby diver is available when the closed bell leaves the 
dive location until the divers are in saturation; and
    (2) A member of the dive team at the dive location is a diver able 
to assist in the recovery of the closed bell or its occupants, if 
required;
    (h) When closed bell operations are conducted, a diver is available 
in the closed bell to assist a diver in the water;
    (i) When a diver is in a physically confining space, another diver 
is stationed at the underwater point of entry and is line-tending the 
diver;
    (j) Each diving operation has a primary and secondary breathing gas 
supply meeting the requirements of Sec. 197.340; and
    (k) The surface-supplied mixed-gas diver has the equipment required 
by Sec. 197.346 (b) or (d).