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Subpart B—Commercial Diving Operations

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Subpart B—Commercial Diving Operations § 197.200 46 CFR Ch. I (10±1±98 Edition) Subpart A [Reserved] diving supervisor in the logbook as re- quired by § 197.482(c). Subpart BÐCommercial Diving § 197.203 Right of appeal. Operations Any person directly affected by a de- GENERAL cision or action taken under this sub- chapter, by or on behalf of the Coast § 197.200 Purpose of subpart. Guard, may appeal therefrom in ac- cordance with subpart 1.03 of this chap- This subpart prescribes rules for the ter. design, construction, and use of equip- ment, and inspection, operation, and [CGD 88±033, 54 FR 50382, Dec. 6, 1989] safety and health standards for com- mercial diving operations taking place § 197.204 Definitions. from vessels and facilities under Coast As used in this subpart: Guard jurisdiction. ACFM means actual cubic feet per minute. § 197.202 Applicability. ANSI Code1 means the B31.1 Amer- (a) This subpart applies to commer- ican National Standards Institute cial diving operations taking place at ``Code for Pressure Piping, Power Pip- any deepwater port or the safety zone ing.'' means the American So- thereof as defined in 33 CFR part 150; ASME Code ciety of Mechanical Engineers ``Boiler from any artificial island, installation, and Pressure Vessel Code.'' or other device on the Outer Continen- ASME PVHO±1 means the ANSI/ tal Shelf and the waters adjacent ASME standard ``Safety Standard for thereto as defined in 33 CFR part 147 or Pressure Vessels for Human Occu- otherwise related to activities on the pancy.'' Outer Continental Shelf; and from all ATA means a measure of pressure ex- vessels required to have a certificate of pressed in terms of atmosphere abso- inspection issued by the Coast Guard lute (includes barometric pressure). including mobile offshore drilling units Bell means a compartment either at regardless of their geographic location, ambient pressure (open bell) or pressur- or from any vessel connected with a ized (closed bell) that allows the diver deepwater port or within the deepwater to be transported to and from the un- port safety zone, or from any vessel en- derwater work site, allows the diver ac- gaged in activities related to the Outer cess to the surrounding environment, Continental Shelf; except that this sub- and is capable of being used as a refuge part does not apply to any diving oper- during diving operations. ationÐ Bottom time means the total elapsed (1) Performed solely for marine sci- time measured in minutes from the entific research and development pur- time the diver leaves the surface in de- poses by educational institutions; scent to the time to the next whole (2) Performed solely for research and minute that the diver begins ascent. development for the advancement of Breathing gas/breathing mixture means diving equipment and technology; or the mixed-gas, oxygen, or air as appro- (3) Performed solely for search and priate supplied to the diver for breath- rescue or related public safety purposes ing. by or under the control of a govern- Bursting pressure means the pressure mental agency. at which a pressure containment device (b) Diving operations may deviate would fail structurally. from the requirements of this subpart Commercial diver means a diver en- to the extent necessary to prevent or gaged in underwater work for hire ex- minimize a situation which is likely to cluding sport and recreational diving cause death, injury, or major environ- and the instruction thereof. mental damage. The circumstances Commercial diving operation means all leading to the situation, the deviations activities in support of a commercial made, and the corrective action taken, diver. if appropriate, to reduce the possibility Cylinder means a pressure vessel for of recurrence shall be recorded by the the storage of gases under pressure. 390 VerDate 22<OCT>98 07:43 Oct 27, 1998 Jkt 179184 PO 00000 Frm 00386 Fmt 8010 Sfmt 8010 Y:\SGML\179184T.XXX pfrm01 PsN: 179184T Coast Guard, DOT § 197.204 Decompression chamber means a pres- other device on the Outer Continental sure vessel for human occupancy such Shelf subject to Coast Guard jurisdic- as a surface decompression chamber, tion. closed bell, or deep diving system espe- Fsw means feet of seawater (or equiv- cially equipped to recompress, decom- alent static pressure head). press, and treat divers. Gas embolism means a condition Decompression sickness means a condi- caused by expanding gases, which have tion caused by the formation of gas or been taken into and retained in the gas bubbles in the blood or body tissue lungs while breathing under pressure, as a result of pressure reduction. being forced into the bloodstream or Decompression table means a profile or other tissues during ascent or decom- set of profiles of ascent rates and pression. breathing mixtures designed to reduce Heavy-weight diving outfit means the pressure on a diver safely to atmos- diver-worn surface-supplied deep-sea pheric pressure after the diver has been dress. exposed to a specific depth and bottom time. Hyperbaric conditions means pressure Depth means the maximum pressure conditions in excess of surface atmos- expressed in feet of seawater attained pheric pressure. by a diver and is used to express the Injurious corrosion means an advanced depth of a dive. state of corrosion which may impair Dive location means that portion of a the structural integrity or safe oper- vessel or facility from which a diving ation of the equipment. operation is conducted. Liveboating means the support of a Dive team means the divers and diver surfaced-supplied diver from a vessel support personnel involved in a diving underway. operation, including the diving super- Maximum working pressure means the visor. maximum pressure to which a pressure Diver means a person working be- containment device can be exposed neath the surface, exposed to under operating conditions (usually the hyperbaric conditions, and using un- pressure setting of the pressure relief derwater breathing apparatus. device). Diver-carried reserve breathing gas No-decompression limits means the air means a supply of air or mixed-gas, as depth and bottom time limits of appen- appropriate, carried by the diver in ad- dix A. dition to the primary or secondary Pressure vessel means a container ca- breathing gas supplied to the diver. pable of withstanding an internal max- Diving installation means all of the imum working pressure over 15 psig. equipment used in support of a com- Psi(g) means pounds per square inch mercial diving operation. (gage). Diving mode means a type of diving requiring SCUBA, surface-supplied air, PVHO means pressure vessel for or surface-supplied mixed-gas equip- human occupancy but does not include ment, with related procedures and pressure vessels for human occupancy techniques. that may be subjected to external pres- Diving stage means a suspended plat- sures in excess of 15 psig but can only form constructed to carry one or more be subjected to maximum internal divers and used for putting divers into pressures of 15 psig or less (i.e., the water and bringing them to the submersibles, or one atmosphere obser- surface when in-water decompression vation bells). or a heavy-weight diving outfit is used. Saturation diving means saturating a Diving supervisor means the person diver's tissues with the inert gas in the having complete responsibility for the breathing mixture to allow an exten- safety of a commercial diving oper- sion of bottom time without additional ation including the responsibility for decompression. the safety and health of all diving per- SCUBA diving means a diving mode in sonnel in accordance with this subpart. which the diver is supplied with a com- Facility means a deepwater port, or pressed breathing mixture from diver an artificial island, installation, or carried equipment. 391 VerDate 22<OCT>98 07:43 Oct 27, 1998 Jkt 179184 PO 00000 Frm 00387 Fmt 8010 Sfmt 8010 Y:\SGML\179184T.XXX pfrm01 PsN: 179184T § 197.205 46 CFR Ch. I (10±1±98 Edition) Standby diver means a diver at the (2) American Society of Mechanical dive location available to assist a diver Engineers, United Engineering Center, in the water. 345 East 47th Street, New York, NY Surface-supplied air diving means a 10017. diving mode in which the diver is sup- [CGD 76±009, 43 FR 53683, Nov. 16, 1978, as plied from the dive location or bell amended by CGD 96±041, 61 FR 50735, Sept. 27, with compressed breathing air includ- 1996] ing oxygen or oxygen enriched air if supplied for treatment. § 197.206 Substitutes for required Surface-supplied mixed-gas diving equipment, materials, apparatus, means a diving mode in which the diver arrangements, procedures, or tests. is supplied from the dive location or (a) The Coast Guard may accept sub- bell with a compressed breathing mix- stitutes for equipment, materials, ap- ture other than air. paratus, arrangements, procedures, or Timekeeping device means a device for tests required in this subpart if the measuring the time of a dive in min- substitute provides an equivalent level utes. of safety. Treatment table means a depth, time, (b) In any case where it is shown to and breathing gas profile designed to the satisfaction of the Commandant treat a diver for decompression sick- that the use of any particular equip- ness. ment, material, apparatus, arrange- Umbilical means the hose bundle be- ment, procedure, or test is unreason- tween a dive location and a diver or able or impracticable, the Com- bell, or between a diver and a bell, that mandant may permit the use of alter- supplies the diver or bell with a life- nate equipment, material, apparatus, line, breathing gas, communications, arrangement, procedure, or test to power, and heat as appropriate to the such an extent and upon such condition diving mode or conditions.
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