California Code of Regulations › Title 8 - Industrial Relations › Division 1 - Department of Industrial Relations › Chapter 4 - Division of Industrial Safety › Subchapter 7 - General Industry Safety Orders › Group 26 - Driving and Pressurized Worksite Operations › Article 152 - Diving Operations › Section 6051 - Definitions

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
As used in this Article, the listed terms are as
						  follows:
Acfm. Actual cubic feet per minute.
ASME Code or Equivalent. ASME (American Society of
						  Mechanical Engineers) Boiler and Pressure Vessel Code, Section VIII, or an
						  equivalent code which the employer can demonstrate to be equally
						  effective.
ATA. Atmosphere absolute.
Agricultural Diving. All diving operations (including
						  maricultural and aquacultural diving) performed by agricultural employees
						  necessary to a farming activity including but not limited to maintenance
						  planting, cultivation, growing or harvesting not conducted by a commercial
						  diver.
Aquaculture (Mariculture). The culture and husbandry of
						  aquatic organisms.
Bell. An enclosed compartment, pressurized (closed
						  bell) or unpressurized (open bell), which allows the diver to be transported to
						  and from the underwater work area which may be used as a temporary refuge
						  during diving operations.
Bottom Time. The total elapsed time measured in minutes
						  from the time when the diver leaves the surface in descent to the time that the
						  diver begins ascent.
Breath-hold Diving. A diving mode in which the diver
						  uses no self-contained or surface-supplied air or oxygen supply.
Bursting Pressure. The pressure at which a pressure
						  containment device would fail structurally.
Commercial Diver. A diver hired for underwater work who
						  is engaged in commercial diving operations.
Commercial Diving Operations. All diving operations in
						  which construction, demolition, repair, maintenance, shipbuilding, shipbreaking
						  or ship repair, work is performed.
Cylinder. A pressure vessel for the storage of
						  gases.
Decompression Chamber. A pressure vessel for human
						  occupancy such as a surface decompression chamber, closed bell, or deep diving
						  systems used to decompress divers and to treat decompression sickness.
Decompression Sickness. A condition with a variety of
						  symptoms which may result from gas and bubbles in the tissues of divers after
						  pressure reduction.
Decompression Table. A profile or set of profiles of
						  depth-time relationships for ascent rates and breathing mixtures to be followed
						  after a specific depth-time exposure or exposures.
Dive Location. A surface or vessel from which a diving
						  operation is conducted.
Dive-Location Reserve Breathing Gas. A supply system of
						  air or mixed gas (as appropriate) at the dive location which is independent of
						  the primary supply system and sufficient to support divers during the planned
						  decompression.
Diver. An employee working in water who using
						  apparatus, including snorkels, which supplies breathing gas at ambient
						  pressure.
Diver-in-Training. An employee gaining experience and
						  training in additional diving activities under the supervision of a dive team
						  member experienced in those activities.
Diver-Carried Reserve Breathing Gas. A diver-carried
						  supply of air or mixed gas (as appropriate) sufficient under standard operating
						  conditions to allow the diver to reach the surface, or another source of
						  breathing gas, or to be reached by a standby diver.
Dive Site. The physical location of a diver during a
						  dive which may be on the surface or underwater.
Dive Team. Divers and support employees who are exposed
						  to or control the exposure of others to hyperbaric conditions, including the
						  designated person-in-charge.
Diving Mode. A type of diving requiring specific
						  equipment, procedures and techniques (SCUBA, surface-supplied air, or mixed
						  gas).
Film and TV Diving. Underwater operations associated
						  with the production of feature films, television, natural history visuals,
						  corporate videos, and photographic stills, which are not an integral part of an
						  ongoing construction, demolition, or maintenance job.
Feet of seawater (or equivalent static pressure
						  head).
Heavy Gear. Diver-worn, deep-sea dress including but
						  not limited to helmet, breastplate, dry suit.
Hookah Diving. A type of shallow water surface-supplied
						  diving where the diver uses the second stage of a SCUBA regulator connected to
						  a non-return valve and hose to a surface air source.
Hyperbaric Conditions. Pressure conditions in excess of
						  normal atmospheric pressure at the dive site.
Inwater Stage. A suspended underwater platform which
						  supports a diver in the water.
Liveboating. The practice of supporting a
						  surface-supplied air or mixed gas diver from a vessel which is underway.
Maximum Working Pressure. The maximum pressure to which
						  a containment device may be exposed under standard operating conditions.
Mixed-Gas Diving. A diving mode in which the diver is
						  supplied in the water with a breathing gas other than air.
Msw. Meters of seawater (or equivalent static pressure
						  head).
No-Decompression Limits. The depth-time limits of the
						  "no-decompressions limits and repetitive dive group designations table for
						  no-decompression air dives." U.S. Navy diving Manual or equivalent limits which
						  the employer can demonstrate to be equally effective.
Positive Buckling Device. A device used to attach a
						  safety harness to the diver, which is designed to prevent strap pull-through
						  and accidental release by the diver. Unbuckling the device shall not be
						  possible by a single action.
Pressure-Related Injury. Any injury resulting from
						  pressure disequilibrium within the body as the result of hyperbaric exposure
						  such as: decompression sickness, pneumothorax, mediastinal emphysema, air
						  embolism, or subcutaneous emphysema.
Psi(g). Pounds per square inch (gauge).
Scientific Diving. All diving performed solely as a
						  necessary part of a scientific research, or educational activity by employees
						  whose sole purpose for diving is to perform scientific research tasks.
						  Scientific diving does not include performing any tasks usually associated with
						  commercial diving such as: placing or removing heavy objects underwater,
						  inspection of pipelines and similar objects; construction; demolition; cutting
						  or welding; or the use of explosives.
SCUBA Diving. A diving mode independent of surface
						  supply in which the diver uses open circuit self-contained underwater breathing
						  apparatus.
Standby Diver. A diver at the dive location capable of
						  rendering immediate assistance to a diver in the water.
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.
Technical Diving. Diving other than scientific or
						  commercial diving, which requires technical expertise and is not an integral
						  part of an ongoing construction, demolition, repair, maintenance, shipbuilding,
						  shipbreaking, or ship repair job. Such activities include, but are not limited
						  to, making or performing observations, measurements, and adjustments, film and
						  TV diving, and zoo and aquarium exhibit diving.
Treatment Table. A depth-time and breathing gas profile
						  designed to treat decompression sickness.
Umbilical. The composite hose bundle between a dive
						  location and a diver or bell, or between a diver and a bell, which supplies the
						  diver or 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.
Volume Tank. A pressure vessel connected to the outlet
						  of a compressor and used as an air reservoir.
Working Pressure. The normal pressure at which the
						  system is designed to operate.
Zoo and Aquarium Exhibit Diving. Diving performed
						  inside zoo and aquarium exhibits and holding tanks for the purpose of science,
						  education, or animal care, which requires technical expertise and is not an
						  integral part of an ongoing construction, demolition, or maintenance
						  job.
1.
						  Amendment filed 9-11-80; designated effective 1-1-81 (Register 80, No.
						  37).
2. Amendment filed 6-10-83; effective thirtieth day thereafter
						  (Register 83, No. 24).
3. Change without regulatory effect amending
						  definition of "Liveboating" filed 11-7-2011 pursuant to section
						  100, title 1, California Code of
						  Regulations (Register 2011, No. 45).
4. New definitions of "Film and
						  TV Diving," "Positive Buckling Device" and "Zoo and Aquarium Exhibit Diving"
						  and amendment of definitions of "Hookah Diving" and "Technical Diving" filed
						  6-1-2021; operative 10-1-2021 (Register 2021, No.
						  23).
Note: Authority cited: Section
							 142.3, Labor
							 Code. Reference: Section
							 142.3, Labor
							 Code.