DIRECTIVE NUMBER: CPL 02-00-151 EFFECTIVE DATE ... - OSHA

necessary assistance in a timely manner. The term “available” means to be
clothed and equipped, and ready to enter the water at a moment’s notice. Gear
such as face masks, air cylinders, and harnesses can be donned quickly, and
need not be worn until the standby diver is required to enter the water.
28. Surface-supplied air diving: A diving mode in which the diver in the water is
supplied from the dive location with compressed air for breathing.
29. Treatment table: A depth-time and breathing-gas profile designed to treat
decompression sickness.
30. Umbilical: The composite hose bundle between a dive location and a diver or
diving bell, or between a diver and a diving bell, which supplies the diver or
diving bell with breathing gas, communications, power, or heat as appropriate to
the diving mode or conditions, and includes a safety line between the diver and
the dive location.
31. Volume tank: A pressure vessel connected to the outlet of a compressor and
used as an air reservoir.
32. Working pressure: The maximum pressure to which a pressure containment
device may be exposed under standard operating conditions.
C. 29 CFR 1910.410 Qualifications of dive team.
1. The level of experience or training required by the standard depends upon the
job the employees are required to do. All dive-team members must have either
experience or training in the use of tools, equipment, systems, techniques,
operations, operational procedures, and emergency procedures that are pertinent
to, and necessary for, the assigned tasks for the diving mode (i.e., SCUBA,
surface-supplied air, or mixed-gas diving). It is essential that those dive-team
members who are exposed to hyperbaric conditions, or those members who
control the exposure of others, have knowledge of the physiological effects of
diving and the related effects of pressure. Accordingly, this standard also
requires that employees be trained in diving-related physics and physiology.
Employee qualifications achieved through field experience or classroom
training, or both, may be used to meet the requirements of the standard. For
example:
a. Most divers begin as tenders and advance to diving status after a period of
field experience and/or classroom training. A diving-tender trainee
receiving on-the-job training will be assigned as a tender only under the
supervision of a qualified diver.
b. Tenders are members of the dive team who provide surface-support to
divers at the diving location. A tender employed in shallow-water air diving
is required to have a basic understanding of the breathing-air system, the
operating and emergency procedures, and knowledge of the care and use of
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