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Home , Commercial diving, Diving bell, Diving supervisor, Gas cylinder

Coast Guard, DHS § 197.204

Subpart B— § 197.203 Right of appeal. Operations Any person directly affected by a de- cision or action taken under this sub- GENERAL chapter, by or on behalf of the Coast Guard, may appeal therefrom in ac- § 197.200 Purpose of subpart. cordance with subpart 1.03 of this chap- This subpart prescribes rules for the ter. design, construction, and use of equip- [CGD 88–033, 54 FR 50382, Dec. 6, 1989] ment, and inspection, operation, and safety and health standards for com- § 197.204 Definitions. mercial diving operations taking place As used in this subpart: from vessels and facilities under Coast ACFM means actual cubic feet per Guard jurisdiction. minute. § 197.202 Applicability. ANSI Code1 means the B31.1 Amer- ican National Standards Institute (a) This subpart applies to commer- ‘‘Code for Piping, Power Pip- cial diving operations taking place at ing.’’ any deepwater port or the safety zone ASME Code means the American So- thereof as defined in 33 CFR part 150; ciety of Mechanical Engineers ‘‘Boiler from any artificial island, installation, and Code.’’ or other device on the Outer Conti- ASME PVHO–1 means the ANSI/ nental 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, (open bell) or pressur- or from any vessel connected with a ized (closed bell) that allows 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. ation— 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 mixture means and technology; or the mixed-gas, , 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 for hire ex- minimize a situation which is likely to cluding sport and 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 under pressure. in the logbook as re- chamber means a pres- quired by § 197.482(c). sure vessel for human occupancy such

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as a surface decompression chamber, Shelf subject to Coast Guard jurisdic- closed bell, or system espe- tion. cially equipped to recompress, decom- Fsw means feet of seawater (or equiv- press, and treat divers. alent static pressure head). means a condi- Gas embolism means a condition tion caused by the formation of gas or caused by expanding gases, which have gas bubbles in the blood or body tissue been taken into and retained in the as a result of pressure reduction. lungs while breathing under pressure, Decompression table means a profile or being forced into the bloodstream or set of profiles of ascent rates and other tissues during ascent or decom- breathing mixtures designed to reduce pression. the pressure on a diver safely to atmos- Heavy- diving outfit means pheric pressure after the diver has been diver-worn surface-supplied deep-sea exposed to a specific depth and bottom dress. 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 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 surfaced-supplied diver from a vessel Dive team means the divers and diver underway. support personnel involved in a diving means the operation, including the diving super- Maximum working pressure maximum pressure to which a pressure visor. containment device can be exposed Diver means a person working be- under operating conditions (usually the neath the surface, exposed to pressure setting of the pressure relief hyperbaric conditions, and using un- device). derwater breathing apparatus. No-decompression limits means the air Diver-carried reserve depth and bottom time limits of appen- means a supply of air or mixed-gas, as dix A. appropriate, carried by the diver in ad- Pressure vessel means a ca- dition to the primary or secondary pable of withstanding an internal max- breathing gas supplied to the diver. imum working pressure over 15 psig. Diving installation means all of the Psi(g) means pounds per square inch equipment used in support of a com- (gage). mercial diving operation. PVHO means pressure vessel for Diving mode means a type of diving human occupancy but does not include requiring SCUBA, surface-supplied air, pressure vessels for human occupancy or surface-supplied mixed-gas equip- that may be subjected to external pres- ment, with related procedures and sures in excess of 15 psig but can only techniques. be subjected to maximum internal Diving stage means a suspended plat- of 15 psig or less (i.e., form constructed to carry one or more , or one atmosphere obser- divers and used for putting divers into vation bells). the water and bringing them to the means saturating a surface when in-water decompression diver’s tissues with the inert gas in the or a heavy-weight diving outfit is used. breathing mixture to allow an exten- Diving supervisor means the person sion of bottom time without additional having complete responsibility for the decompression. safety of a commercial diving oper- means a diving mode in ation including the responsibility for which the diver is supplied with a com- the safety and health of all diving per- pressed breathing mixture from diver sonnel in accordance with this subpart. carried equipment. Facility means a deepwater port, or Standby diver means a diver at the an artificial island, installation, or dive location available to assist a diver other device on the Outer Continental in the water.

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Surface-supplied air diving means a 345 East 47th Street, New York, NY diving mode in which the diver is sup- 10017. plied from the dive location or bell [CGD 76–009, 43 FR 53683, Nov. 16, 1978, as with compressed breathing air includ- amended by CGD 96–041, 61 FR 50735, Sept. 27, ing oxygen or oxygen enriched air if 1996] supplied for treatment. Surface-supplied mixed-gas diving § 197.206 Substitutes for required means a diving mode in which the diver equipment, materials, apparatus, is supplied from the dive location or arrangements, procedures, or tests. bell with a compressed breathing mix- (a) The Coast Guard may accept sub- ture other than air. stitutes for equipment, materials, ap- Timekeeping device means a device for paratus, arrangements, procedures, or measuring the time of a dive in min- tests required in this subpart if the utes. substitute provides an equivalent level Treatment table means a depth, time, of safety. and breathing gas profile designed to (b) In any where it is shown to treat a diver for decompression sick- the satisfaction of the Commandant ness. that the use of any particular equip- Umbilical means the hose bundle be- ment, material, apparatus, arrange- tween a dive location and a diver or ment, procedure, or test is unreason- bell, or between a diver and a bell, that able or impracticable, the Com- supplies the diver or bell with a life- mandant may permit the use of alter- line, breathing gas, communications, nate equipment, material, apparatus, power, and heat as appropriate to the arrangement, procedure, or test to diving mode or conditions. such an extent and upon such condition Vessel means any waterborne craft in- as will insure, to his satisfaction, a de- cluding mobile offshore drilling units gree of safety consistent with the min- required to have a Certificate of In- imum standards set forth in this sub- spection issued by the Coast Guard or part. any waterborne craft connected with a deepwater port or within the deepwater § 197.208 Designation of person-in- port safety zone, or any waterborne charge. craft engaged in activities related to (a) The owner or agent of a vessel or the Outer Continental Shelf. facility without a designated master Volume tank means a pressure vessel shall designate, in writing, an indi- connected to the outlet of a vidual to be the person-in-charge of the and used as an air reservoir. vessel or facility. Working pressure means the pressure (b) Where a master is designated, the to which a pressure containment device master is the person-in-charge. is exposed at any particular instant during normal operating conditions. § 197.210 Designation of diving super- visor. § 197.205 Availability of standards. The name of the diving supervisor for (a) Several standards have been in- each commercial diving operation shall corporated by reference in this sub- be— chapter. The incorporation by ref- (a) Designated in writing; and erence has been approved by the Direc- (b) Given to the person-in-charge tor of the Federal Register under the prior to the commencement of any provisions of 1 CFR part 51. commercial diving operation. (b) The standards are available from the appropriate organizations whose EQUIPMENT addresses are listed below: (1) American National Standards In- § 197.300 Applicability. stitute, 11 West 42nd Street, New York, (a) Each diving installation used on NY 10036. each vessel or facility subject to this (2) American Society of Mechanical subpart must meet the requirements of Engineers, United Engineering Center, this subpart.

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(b) In addition to the requirements of (i) Are made of corrosion-resistant this subpart, equipment which is per- material; manently installed on vessels and is (ii) Are resistant to accidental dis- part of the diving installation must engagement; and meet Subchapters F and J of this chap- (iii) Have a maximum working pres- ter. sure that is at least equal to the max- (c) All repairs and modifications to imum working pressure of the hose to pressure vessels used for commercial which they are attached; and diving operations must be made in ac- (4) Resist kinking by— cordance with the requirements of sec- (i) Being made of kink-resistant ma- tion VIII, division 1 or division 2 of the terials; or ASME Code, ASME PVHO–1, part 54 of (ii) Having exterior support. this chapter, or 49 CFR 173.34, as appli- (b) Each umbilical must— cable. (1) Meet the requirements of para- (d) All repairs and modifications to graph (a) of this section; and pressure piping used for commercial (2) Be marked from the diver or open diving operations must be made in ac- bell end in 10-foot intervals to 100 feet cordance with the requirements of the and in 50-foot intervals thereafter. ANSI Code or part 56 of this chapter, as applicable. § 197.314 and treatment equipment. § 197.310 Air compressor system. (a) Each dive location must have— A compressor used to supply breath- (1) A medical kit approved by a phy- ing air to a diver must have— sician that consists of— (a) A volume tank that is— (i) Basic first aid supplies; and (1) Built and stamped in accordance (ii) Any additional supplies necessary with section VIII, division 1 of the to treat minor trauma and illnesses re- ASME Code with— sulting from hyperbaric exposure; (i) A check on the inlet side; (2) A copy of an American Red Cross (ii) A pressure gage; Standard First Aid handbook; (iii) A relief valve; and (3) A -type manual resuscitator (iv) A drain valve; and with transparent mask and tubing; and (2) Tested after every repair, modi- (4) A capability to remove an injured fication, or alteration to the pressure diver from the water. boundaries as required by § 197.462; (b) Each diving installation must (b) Intakes that are located away have a two-way communications sys- from areas containing exhaust fumes of tem to obtain emergency assistance ex- internal combustion engines or other cept when the vessel or facility ship-to- hazardous contaminants; shore, two-way communications sys- (c) An efficient filtration system; and tem is readily available. (d) Slow-opening shut-off when (c) Each dive location supporting the maximum allowable working pres- mixed-gas dives, dives deeper than 130 sure of the system exceeds 500 psig. fsw, or dives outside the no-decompres- sion limits must meet the require- § 197.312 Breathing supply hoses. ments of paragraph (a) of this section (a) Each breathing supply hose and have— must— (1) A decompression chamber; (1) Have a maximum working pres- (2) Decompression and treatment ta- sure that is equal to or exceeds— bles; (i) The maximum working pressure of (3) A supply of breathing gases suffi- the section of the breathing supply sys- cient to treat for decompression sick- tem in which used; and ness; (ii) The pressure equivalent of the (4) The medical kit required by para- maximum depth of the dive relative to graph (a)(1) of this section that is— the supply source plus 100 psig; (i) Capable of being carried into the (2) Have a bursting pressure of four decompression chamber; and times its maximum working pressure; (ii) Suitable for use under hyperbaric (3) Have connectors that— conditions; and

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(5) A capability to assist an injured (1) Ventilate at least 4.5 ACFM at diver into the decompression chamber. any depth at which it is operated; or (2) Be able to maintain the diver’s in- § 197.318 Gages and timekeeping de- spired vices. below 0.02 ATA when the diver is pro- (a) A gage indicating diver depth ducing carbon dioxide at the rate of 1.6 must be at each dive location for sur- standard liters per minute. face-supplied dives. (b) A timekeeping device must be at § 197.324 Diver’s safety harness. each dive location. Each safety harness used in surface- § 197.320 Diving ladder and stage. supplied diving must have— (a) A positive buckling device; and (a) Each diving ladder must— (b) An attachment point for the um- (1) Be capable of supporting the bilical life line that— weight of at least two divers; (1) Distributes the pulling of (2) Extend 3 feet below the water sur- the umbilical over the diver’s body; face; and (3) Be firmly in place; (4) Be available at the dive location (2) Prevents strain on the mask or for a diver to enter or exit the water helmet. unless a diving stage or bell is pro- § 197.326 Oxygen safety. vided; and (5) Be—(i) Made of corrosion-resist- (a) Equipment used with oxygen or ant material; or oxygen mixtures greater than 40 per- (ii) Protected against and maintained cent by volume must be designed for free from injurious corrosion. such use. (b) Each diving stage must— (b) Oxygen systems with pressures (1) Be capable of supporting the greater than 125 psig must have slow- weight of at least two divers; opening shut-off valves except pressure (2) Have an open-grating platform; boundary shut-off valves may be ball (3) Be available for a diver to enter or valves. exit the water from the dive location and for in-water decompression if the § 197.328 PVHO—General. diver is— (a) Each PVHO, contracted for or (i) Wearing a heavy-weight diving purchased after February 1, 1979, must outfit; or be built and stamped in accordance (ii) Diving outside the no-decompres- with ASME PVHO–1. sion limits, except when a bell is pro- (b) Each PVHO, contracted for or vided; and constructed before February 1, 1979, (4) Be—(i) Made of corrosion-resist- and not Coast Guard approved, must be ant material; or submitted to the Coast Guard for ap- (ii) Protected against and maintained proval prior to February 1, 1984. free from injurious corrosion. (c) To be approved under paragraph § 197.322 Surface-supplied helmets and (b), a PVHO must be— masks. (1) Constructed in accordance with (a) Each surface-supplied helmet or part 54 of this chapter; or— mask must have— (2) Be built in accordance with sec- (1) A nonreturn valve at the attach- tion VIII, division 1 or division 2 of the ment point between helmet or mask ASME Code; and— and umbilical that closes readily and (i) Have the plans approved in accord- positively; ance with § 54.01–18 of this chapter; (2) An exhaust valve; and (ii) Pass the radiographic and other (3) A two-way voice communication survey tests of welded joints required system between the diver and the dive by section VIII, division 1 or division 2, location or bell. as appropriate, of the ASME Code; and (b) Each surface-supplied air helmet (iii) Pass—(A) The or mask must— described in § 54.10–10 of this chapter; or

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(B) The pneumatic test described in (13) Have a means of extinguishing a § 54.10–15 of this chapter and such addi- fire in the interior; tional tests as the Officer-in-Charge, (14) Have a means of maintaining the Marine Inspection (OCMI) may require. oxygen content of the interior atmos- (d) Each PVHO must— phere below 25 percent surface equiva- (1) Have a shut-off valve located lent by volume when pressurized with within 1 foot of the pressure boundary air as the breathing mixture; on all piping penetrating the pressure (15) Have a means of maintaining the boundary; interior atmosphere below 2 percent (2) Have a check valve located within surface equivalent carbon dioxide by 1 foot of the pressure boundary on all volume; piping exclusively carrying fluids into (16) Have a means of overriding and the PVHO; controlling from the exterior all inte- (3) Have the pressure relief device re- rior breathing and pressure supply con- quired by ASME PVHO–1; trols; (4) Have a built-in breathing system (17) Have a speech unscrambler when with at least one mask per occupant used with mixed-gas; stored inside each separately pressur- (18) Have interior electrical systems ized compartment; that are designed for the environment (5) Have a two-way voice communica- in which they will operate to minimize tions system allowing communications the of fire, electrical shock to per- between an occupant in one pressurized sonnel, and galvanic action of the compartment of the PVHO and— PVHO; and (i) The diving supervisor at the dive (19) Be tested after every repair, location; modification, or alteration to the pres- (ii) Any divers being supported from sure boundaries as required by § 197.462. the same PVHO; and (iii) Occupants of other separately § 197.330 PVHO—Closed bells. pressurized compartments of the same (a) Except as provided in paragraph PVHO; (b) of this section, each closed bell (6) If designed to mechanically couple must meet the requirements of § 197.328 to another PVHO, have a two-way com- and— munications system allowing commu- (1) Have underwater breathing appa- nications between occupants of each ratus for each occupant stored inside PVHO when mechanically coupled; each separately pressurized compart- (7) Have a pressure gage in the inte- ment; rior of each compartment that is— (2) Have an umbilical; (i) Designed for human occupancy; (3) Have lifting equipment attached and to the closed bell capable of returning (ii) Capable of having the compart- the occupied closed bell when fully ment pressure controlled from inside flooded to the dive location; the PVHO; (4) Be capable of recompressing on (8) Have viewports that allow obser- the surface to the maximum design vation of occupants from the outside; diving depth; (9) Have viewports that meet the re- (5) Be constructed and equipped as re- quirements of ASME PVHO–1 except quired by § 197.332; those PVHO’s approved under para- (6) Have an emergency locating de- graph (b) of this section which have vice designed to assist personnel on the nonacrylic viewports; surface in acquiring and maintaining (10) Have means of illumination suffi- contact with the submerged PVHO if cient to allow an occupant to— the umbilical to the surface is severed; (i) Read gages; and (7) Have a capability to remove an in- (ii) Operate the installed systems jured diver from the water; and within each compartment; (8) Have a life support capability for (11) Be designed and equipped to min- the intact closed bell and its occupants imize sources of combustible materials for— and ignition; (i) Twelve hours after an accident (12) Have a protective device on the severing the umbilical to the surface inlet side of PVHO exhaust lines; when the umbilical to the surface is

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the only installed means of retrieving (1) 6 ATA, when used for diving to 300 the closed bell; or fsw; or (ii) A period of time, at least equal to (2) The maximum depth of the dive, 1 hour plus twice the time required to when used for diving operations deeper retrieve the bell from its designed op- than 300 fsw, unless a closed bell meet- erating depth and attach an auxiliary ing the requirements of § 197.330(a) (3), lifesupport system, after an accident (4), and (5) is used; severing the umbilical to the surface (i) Have a minimum pressurization when the umbilical is one of the two rate of 2 ATA per minute to 60 fsw and independent installed means of retriev- at least 1 ATA per minute thereafter; ing the closed bell, each meeting the (j) Have a decompression rate of 1 requirements of paragraph (a)(3) of this ATA per minute to 33 fsw; section. (k) Have an external pressure gage (b) A closed bell that does not meet for each pressurized compartment; the requirements of paragraphs (a)(3), (l) Have a capability to supply (a)(4), and (a)(5) of this section, must be breathing mixtures at the maximum capable of attachment to another rate required by each occupant doing PVHO that— heavy work; and (1) Allows the transfer of personnel (m) Have a sound-powered headset or and diver’s equipment under pressure telephone as a backup to the commu- from the closed bell to the PVHO; nications system required by § 197.328(c) (2) Meets the requirements of para- (5) and (6), except when that commu- graph (a)(3) of this section; nications system is a sound-powered system. (3) Is capable of attachment to a de- compression chamber meeting the re- § 197.334 Open diving bells. quirements of paragraphs (a)(4) and (a)(5) of this section; and Each open must— (a) Have an upper section that pro- (4) Allows the transfer of personnel vides an capable of maintain- and diver’s equipment under pressure ing a bubble of breathing mixture from the PVHO to the decompression available to a diver standing on the chamber. lower section of the platform with his § 197.332 PVHO—Decompression body through the open bottom and his chambers. head in the bubble; (b) Have lifting equipment capable of Each decompression chamber must— returning the occupied open bell to the (a) Meet the requirements of § 197.328; dive location; (b) Have internal dimensions suffi- (c) Have an umbilical; and cient to accommodate a diver lying in (d) Be—(1) Made of corrosion-resist- a horizontal position and another per- ing material; or son tending the diver; (2) Protected against and maintained (c) Have a capability for ingress and free from injurious corrosion. egress of personnel and equipment while the occupants are under pressure; § 197.336 Pressure piping. (d) Have a means of operating all in- Piping systems that are not an inte- stalled man-way locking devices, ex- gral part of the vessel or facility, car- cept disabled shipping dogs, from both rying fluids under pressures exceeding sides of a closed hatch; 15 psig must— (e) Have interior illumination suffi- (a) Meet the ANSI Code; cient to allow visual observation, diag- (b) Have the point of connection to nosis, and medical treatment of an oc- the integral piping system of the vessel cupant. or facility clearly marked; and (f) Have one bunk for each two occu- (c) Be tested after every repair, modi- pants; fication, or alteration to the pressure (g) Have a capability that allows boundaries as set forth in § 197.462. bunks to be seen over their entire lengths from the exterior; § 197.338 Compressed gas cylinders. (h) Have a minimum pressure capa- Each compressed must— bility of— (a) Be stored in a ventilated area;

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(b) Be protected from excessive heat; the dive location or planned pick-up (c) Be prevented from falling; point. (d) Be tested after any repair, modi- (e) A diver-carried reserve breathing fication, or alteration to the pressure gas supply for SCUBA diving must be boundaries as set forth in § 197.462; and sufficient to allow the diver to return (e) Meet the requirements of— to the dive location or planned pick-up (1) Part 54 of this chapter; or point from the greatest depth of the (2) 49 CFR 173.34 and 49 CFR part 178, planned dive. subpart C. (f) Oxygen used for breathing mix- tures must— § 197.340 Breathing gas supply. (1) Meet the requirements of Federal (a) A primary breathing gas supply Specification BB-0–925a; and for surface-supplied diving must be suf- (2) Be type 1 (gaseous) grade A or B. ficient to support the following for the (g) Nitrogen used for breathing mix- duration of the planned dive: tures must— (1) The diver. (1) Meet the requirements of Federal (2) The standby diver. Specification BB-N–411c; (3) The decompression chamber, when (2) Be type 1 (gaseous); required by § 197.432(e)(2) or by (3) Be class 1 (oil free); and § 197.434(a) for the duration of the dive (4) Be grade A, B, or C. and for one hour after completion of (h) used for breathing mix- the planned dive. tures must be grades A, B, or C pro- (4) A decompression chamber when duced by the Federal Government, or provided but not required by this sub- equivalent. part. (i) used for breathing (5) A closed bell when provided or re- mixtures must— quired by § 197.434(d). (1) Be 20 to 22 percent oxygen by vol- (6) An open bell when provided or re- ume; quired by § 197.432(e)(4) or by § 197.434(c). (2) Have no objectionable odor; and (b) A secondary breathing gas supply (3) Have no more than— for surface-supplied diving must be suf- (i) 1,000 parts per million of carbon ficient to support the following: dioxide; (1) The diver while returning to the (ii) 20 parts per million carbon mon- surface. oxide; (2) The diver during decompression. (iii) 5 milligrams per cubic meter of (3) The standby diver. solid and liquid particulates including (4) The decompression chamber when oil; and required by § 197.432(e)(2) or by (iv) 25 parts per million of hydro- § 197.434(a) for the duration of the dive carbons (includes and all and one hour after the completion of other hydrocarbons expressed as meth- the planned dive. ane). (5) The closed bell while returning the diver to the surface. § 197.342 -changing devices. (6) The open bell while returning the (a) A or other buoyancy- diver to the surface. changing device not directly connected (c) A diver-carried reserve breathing to the exhaust valve of the helmet or gas supply for surface-supplied must have an independent ex- must be sufficient to allow the diver haust valve. to— (b) When used for SCUBA diving, a (1) Reach the surface. buoyancy-changing device must have (2) Reach another source of breathing an inflation source separate from the gas; or breathing gas supply. (3) Be reached by a standby diver equipped with another source of § 197.344 Inflatable floatation devices. breathing gas for the diver. An inflatable floatation device for (d) A primary breathing gas supply SCUBA diving must— for SCUBA diving must be sufficient to (a) Be capable of maintaining the support the diver for the duration of diver at the surface in a faceup posi- the planned dive through his return to tion;

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(b) Have a manually activated infla- (4) A diving dress group consisting of tion device; wet or dry diving dress, gloves, shoes (c) Have an oral inflation device; or fins, and knife; and (d) Have an over-pressure relief de- (5) A hose group consisting of the vice; and breathing gas hose and fittings, the (e) Have a manually operated exhaust control valve, the lifeline, communica- valve. tions cable, and a pneumofathometer (if the breaking strength of the com- § 197.346 Diver’s equipment. munications cable is at least equal to (a) Each diver using SCUBA must that required for the lifeline, the com- have— munications cable can serve as the life- (1) Self-contained underwater breath- line). ing equipment including— (e) Each surface-supplied air dive op- (i) A primary breathing gas supply eration within the no-decompression with a cylinder pressure gage readable limits and to depths of 130 fsw or less by the diver during the dive; and must have a primary breathing gas (ii) A diver-carried reserve breathing supply at the dive location. gas supply provided by— (f) Each surface-supplied dive oper- (A) A manual reserve (J valve); or ation outside the no-compression lim- (B) An independent reserve cylinder its, deeper than 130 fsw, or using connected and ready for use; mixed-gas as a breathing mixture must (2) A face mask; have at the dive location— (3) An inflatable floatation device; (1) A primary breathing gas supply; (4) A weight belt capable of quick re- and lease; (2) A secondary breathing gas supply. (5) A knife; (g) Each diver diving outside the no- (6) Swim fins or shoes; decompression limits, deeper than 130 (7) A diving wristwatch; and fsw, or using mixed-gas must have a (8) A depth gage. diver-carried reserve breathing gas (b) Each diver using a heavyweight supply except when using a heavy- diving outfit must— weight diving outfit or when diving in (1) Have a helmet group consisting of a physically confining area. helmet, breastplate, and associated valves and connections; OPERATIONS (2) Have a diving dress group con- sisting of a basic dress that encloses § 197.400 Applicability. the body (except for head and hands) in Diving operations may only be con- a tough, waterproof cover, gloves, ducted from a vessel or facility subject shoes, weight assembly, and knife; to the subpart if the regulations in this (3) Have a hose group consisting of subpart are met. the breathing gas hose and fittings, the control valve, the lifeline, communica- § 197.402 Responsibilities of the per- tions cable, and a pneumofathometer; son-in-charge. and (4) Be provided with a helmet cushion (a) The person-in-charge shall— and weighted shoes. (1) Be fully cognizant of the provi- (c) Each surface-supplied dive oper- sions of this subpart; ation using a heavyweight diving outfit (2) Prior to permitting any commer- must have an extra breathing gas hose cial diving operation to commence, with attaching tools available to the have— standby diver. (i) The designation of the diving su- (d) Each diver using a lightweight pervisor for each diving operation as diving outfit must have— required by § 197.210; (1) A safety harness; (ii) A report on— (2) A weight assembly capable of (A) The nature and planned times of quick release; the planned diving operation; and (3) A mask group consisting of a (B) The planned involvement of the lightweight mask and associated valves vessel or facility, its equipment, and and connections; its personnel in the diving operation.

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(b) Prior to permitting any (i) The tasks to be undertaken; commerical diving operation involving (ii) Any unusual or environ- liveboating to commence, the person- mental conditions likely to affect the in-charge shall insure that— safety of the diving operation; and (1) A means of rapid communications (iii) Any modifications to the oper- with the diving supervisor while the ations manual or procedures including diver is entering, in, or leaving the safety procedures necessitated by the water is established; and specific diving operation; (2) A boat and crew for diver pickup (2) The breathing gas supply systems, in the event of an emergency is pro- masks, helmets, thermal protection, vided. when provided, and bell lifting equip- (c) The person-in-charge shall insure ment, when a bell is provided or re- that a boat and crew for SCUBA diver quired, are inspected prior to each div- pickup is provided when SCUBA divers ing operation; are not line-tended from the dive loca- (3) Each diver is instructed to report tion. any physical problems or physiological (d) The person-in-charge shall coordi- effects including aches, pains, nate the activities on and of the vessel illnesses, or symptoms of decompres- or facility with the diving supervisor. sion sickness prior to each dive; (e) The person-in-charge shall insure (4) A depth, bottom time profile, in- that the vessel or facility equipment cluding any breathing mixture and personnel are kept clear of the dive changes, is maintained at the dive lo- location except after coordinating with cation for each diver during the dive, the diving supervisor. except that SCUBA divers shall main- tain their own profiles; § 197.404 Responsibilities of the diving supervisor. (5) A two-way voice communication system is used between— (a) The diving supervisor shall— (i) Each surface-supplied diver and a (1) Be fully cognizant of the provi- dive team member at the dive location sions of this subpart; or bell (when provided); and (2) Be fully cognizant of the provi- (ii) The bell (when provided) and the sions of the re- dive location; quired by § 197.420; (3) Insure that diving operations con- (6) A two-way communication system ducted from a vessel or facility subject is available at the dive location to ob- to this subpart meet the regulations in tain emergency assistance; this subpart; (7) After the completion of each (4) Prior to the commencement of dive— any commercial diving operation, pro- (i) The physical condition of the vide the report required by § 197.402 to diver is checked by— the person-in-charge; (A) Visual observation; and (5) Coordinate with the person-in- (B) Questioning the diver about his charge any changes that are made to physical well-being; the report required by § 197.402; and (ii) The diver is instructed to report (6) Promptly notify the person-in- any physical problems or adverse phys- charge of any diving related casualty, iological effects including aches, pains, accident, or injury. current illnesses, or symptoms of de- (b) The diving supervisor is in charge compression sickness or gas embolism; of the planning and execution of the (iii) The diver is advised of the loca- diving operation including the respon- tion of an operational decompression sibility for the safety and health of the chamber; and dive team. (iv) The diver is alerted to the poten- tial hazards of flying after diving; § 197.410 Dive procedures. (8) For any dive outside the no-de- (a) The diving supervisor shall insure compression limits, deeper than 130 that— fsw, or using mixed-gas as a breathing (1) Before commencing diving oper- mixture— ations, dive team members are briefed (i) A depth, time, decompression pro- on— file including breathing mixture

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changes is maintained for each diver at mencement of any diving operation; the dive location; and (ii) The diver is instructed to remain (2) Make an operations manual avail- awake and in the vicinity of the dive able at the dive location to all mem- location decompression chamber for at bers of the dive team. least one hour after the completion of (b) The operations manual must be a dive, decompression, or treatment; modified in writing when adaptation is and required because of— (iii) A dive team member, other than (1) The configuration or operation of the diver, is trained and available to the vessel or facility; or operate the decompression chamber; (2) The specific diving operation as and planned. (9) When decompression sickness or (c) The operations manual must pro- gas embolism is suspected or symptoms vide for the safety and health of the are evident, a report is completed con- divers. taining— (d) The operations manual must con- (i) The investigation for each inci- tain the following: (1) Safety procedures and dent including— for each diving mode used. (A) The dive and decompression pro- (2) Assignments and responsibilities files; of each dive team member for each div- (B) The composition, depth, and time ing mode used. of breathing mixture changes; (3) Equipment procedures and check- (C) A description of the symptoms in- lists for each diving mode used. cluding depth and time of onset; and (4) Emergency procedures for— (D) A description and results of the (i) Fire; treatment; (ii) Equipment failure; (ii) The evaluation for each incident (iii) Adverse environmental condi- based on— tions including, but not limited to, (A) The investigation; weather and sea state; (B) Consideration of the past per- (iv) Medical illness; and formance of the decompression table (v) Treatment of injury. used; and (5) Procedures dealing with the use (C) Individual susceptibility; and of— (iii) The corrective action taken, if (i) Hand-held power tools; necessary, to reduce the probability of (ii) Welding and burning equipment; recurrence. and (b) The diving supervisor shall ensure (iii) . that the working interval of a dive is SPECIFIC DIVING MODE PROCEDURES terminated when he so directs or when— § 197.430 SCUBA diving. (1) A diver requests termination; The diving supervisor shall insure (2) A diver fails to respond correctly that— to communications or signals from a (a) SCUBA diving is not conducted— dive team member; (1) Outside the no-decompression lim- (3) Communications are lost and can its; not be quickly reestablished between— (2) At depths greater than 130 fsw; (i) The diver and a dive team member (3) Against currents greater than one at the dive location; or (1) knot unless line-tended; and (ii) The person-in-charge and the div- (4) If a diver cannot directly ascend ing supervisor during liveboating oper- to the surface unless line-tended; ations; or (b) The SCUBA diver has the equip- (4) A diver begins to use his diver- ment required by § 197.346(a); carried reserve breathing gas supply. (c) A standby diver is available while a diver is in the water; § 197.420 Operations manual. (d) A diver is line-tended from the (a) The diving supervisor shall— surface or accompanied by another (1) Provide an operations manual to diver in the water in continuous visual the person-in-charge prior to com- contact during the diving operation;

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(e) When a diver is in a physically (b) A diving stage is used except confining space, another diver is sta- when a bell is provided; tioned at the underwater point of entry (c) A bell is used for dives deeper and is line-tending the diver; and than 220 fsw or when the dive involves (f) A boat is available for diver pick- in-water decompression times greater up when the divers are not line-tended than 120 minutes, except when the from the dive location. diver is using a heavy-weight diving outfit or is diving in a physically con- § 197.432 Surface-supplied air diving. fining space; The diving supervisor shall insure (d) A closed bell is used for dives at that— depths greater than 300 fsw, except (a) Surface-supplied air diving is con- when diving is conducted in a phys- ducted at depths less than 190 fsw, ex- ically confining space; cept that dives with bottom times of 30 (e) A separate dive team member minutes or less may be conducted to tends each diver in the water; depths of 220 fsw; (f) A standby diver is available dur- (b) Each diving operation has a pri- ing all nonsaturation dives; mary breathing gas supply; (g) When saturation diving is con- (c) Each diver is continuously tended ducted— while in the water; (1) A standby diver is available when (d) When a diver is in a physically the closed bell leaves the dive location confining space, another diver is sta- until the divers are in saturation; and tioned at the underwater point of entry (2) A member of the dive team at the and is line-tending the diver; dive location is a diver able to assist in (e) For dives deeper than 130 fsw or the recovery of the closed bell or its oc- outside the no-decompression limits— cupants, if required; (1) Each diving operation has a sec- (h) When closed bell operations are ondary breathing gas supply; conducted, a diver is available in the (2) A decompression chamber is ready closed bell to assist a diver in the for use at the dive location; water; (3) A diving stage is used except when (i) When a diver is in a physically a bell is provided; confining space, another diver is sta- (4) A bell is used for dives with an in- tioned at the underwater point of entry water decompression time greater than and is line-tending the diver; 120 minutes, except when the diver is (j) Each diving operation has a pri- using a heavy-weight diving outfit or is mary and secondary breathing gas sup- diving in a physically confining space; ply meeting the requirements of (5) A separate dive team member § 197.340; and tends each diver in the water; (6) A standby diver is available while (k) The surface-supplied mixed-gas a diver is in the water; and diver has the equipment required by (7) Each diver has a diver-carried re- § 197.346 (b) or (d). serve breathing gas supply except when § 197.436 Liveboating. using a heavy-weight diving outfit or when diving in a physically confining (a) During liveboating operations, space; and the person-in-charge shall insure (f) The surface-supplied air diver has that— the equipment required by § 197.346 (b) (1) Diving is not conducted in seas or (d). that impede station-keeping ability of the vessel; § 197.434 Surface-supplied mixed-gas (2) Liveboating operations are not diving. conducted— The diving supervisor shall insure (i) From 1 hour after sunset to 1 hour that— before sunrise; or (a) When mixed-gas diving is con- (ii) During periods of restricted visi- ducted, a decompression chamber or a bility; closed bell meeting the requirements of (3) The propellers of the vessel are § 197.332 is ready for use at the dive lo- stopped before the diver enters or exits cation; the water; and

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(4) A boat is ready to be launched (d) Each breathing supply system, with crew in the event of an emer- supplying mixed-gas to a diver, is gency. checked, prior to commencement of (b) As used in paragraph (a)(2)(ii) of diving operations, at the umbilical or this section, restricted visibility means underwater breathing apparatus con- any condition in which vessel naviga- nection point for the diver, for percent- tional visibility is restricted by fog, age of oxygen. mist, falling snow, heavy rainstorms, sandstorms or any other similar § 197.452 Oxygen cleaning. causes. The diving supervisor shall ensure (c) During liveboating operations, the that equipment used with oxygen or diving supervisor shall insure that— oxygen mixtures greater than 40 per- (1) Diving is not conducted at depths cent by volume is cleaned of flammable greater than 220 fsw; materials— (2) Diving is not conducted in seas (a) Before being placed into service; that impede diver mobility or work and function; (b) After any repair, alteration, (3) A means is used to prevent the modification, or suspected contamina- diver’s hose from entangling in the pro- tion. pellers of the vessel; (4) Each diver carries a reserve § 197.454 First aid and treatment breathing gas supply; equipment. (5) A standby diver is available while The diving supervisor shall ensure a diver is in the water; that medical kits are checked monthly (6) Diving is not conducted with in- to insure that all required supplies are water decompression times greater present. than 120 minutes; and (7) The person-in-charge is notified § 197.456 Breathing supply hoses. before a diver enters or exits the water. (a) The diving supervisor shall insure that— PERIODIC TESTS AND INSPECTIONS OF (1) Each breathing supply hose is DIVING EQUIPMENT pressure tested prior to being placed into initial service and every 24 months § 197.450 Breathing gas tests. thereafter to 1.5 times its maximum The diving supervisor shall insure working pressure; that— (2) Each breathing supply hose as- (a) The output of each air compressor sembly, prior to being placed into ini- is tested and meets the requirements of tial service and after any repair, modi- § 197.340 for quality and quantity by fication, or alteration, is tensile tested means of samples taken at the connec- by— tion point to the distribution system— (i) Subjecting each hose-to-fitting (1) Every 6 months; and connection to a 200 pound axial load; (2) After every repair or modifica- and tion. (ii) Passing a visual examination for (b) Purchased supplies of breathing evidence of separation, slippage, or mixtures supplied to a diver are other damage to the assembly; checked before being placed on line (3) Each breathing supply hose is pe- for— riodically checked for— (1) Certification that the supply (i) Damage which is likely to affect meets the requirements of § 197.340; and pressure integrity; and (2) Noxious or offensive odor and oxy- (ii) Contamination which is likely to gen percentage; affect the purity of the breathing mix- (c) Each breathing supply system is ture delivered to the diver; and checked, prior to commencement of (4) The open ends of each breathing diving operations, at the umbilical or supply hose are taped, capped, or underwater breathing apparatus con- plugged when not in use. nection point for the diver, for noxious (b) To meet the requirements of para- or offensive odor and presence of oil graph (a)(3) of this section, each mist; and breathing supply hose must be—

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(1) Carefully inspected before being (2) PVHOs subject to internal pres- shipped to the dive location; sure shall be leak tested at the max- (2) Visually checked during daily op- imum allowable working pressure eration; and using the breathing mixture normally (3) Checked for noxious or offensive used in service. odor before each diving operation. (3) Equivalent may be conducted in lieu of pressure § 197.458 Gages and timekeeping de- vices. testing. Proposals to use non- destructive testing in lieu of pressure The diving supervisor shall insure testing shall be submitted to the Offi- that— cer in Charge, Marine Inspection. (a) Each depth gage and timekeeping device is tested or calibrated against a (d) Unless otherwise noted, pressure master reference gage or time-keeping tests conducted in accordance with this device every 6 months; section shall be either hydrostatic (b) A depth gage is tested when a dis- tests or pneumatic tests. crepancy exists in a depth gage reading (1) When a hydrostatic test is con- greater than 2 percent of full scale be- ducted on a pressure vessel, the test tween any two gages of similar range pressure shall be no less than 1.25 times and calibration; the maximum allowable working pres- (c) A timekeeping device is tested sure. when a discrepancy exists in a (2) When a pneumatic test is con- timekeeping device reading greater ducted on a pressure vessel, the test than one-quarter of a minute in a 4- pressure shall be the maximum allow- hour period between any two able working pressure stamped on the timekeeping devices; and nameplate. (d) Each depth gage and timekeeping (3) When a pneumatic test is con- device is inspected before diving oper- ducted on piping, the test pressure ations are begun. shall be no less than 90 percent of the § 197.460 Diving equipment. setting of the relief device. (4) Pressure tests shall be conducted The diving supervisor shall insure only after suitable precautions are that the diving equipment designated taken to protect personnel and equip- for use in a dive under § 197.346 is in- spected before each dive. ment. (5) When pressure tests are conducted § 197.462 Pressure vessels and pres- on pressure vessels or pressure piping, sure piping. the test pressure shall be maintained (a) The diving supervisor shall ensure for a period of time sufficient to allow that each pressure vessel, including examination of all joints, connections each volume tank, cylinder and PVHO, and high stress areas. and each pressure piping system is ex- [CGD 95–028, 62 FR 51220, Sept. 30, 1997] amined and tested as required by this section and after any repair, modifica- RECORDS tion or alteration to determine that they are in satisfactory condition and § 197.480 Logbooks. fit for the service intended. (a) The person-in-charge of a vessel (b) Pressure vessels and pressure pip- or facility, that is required by 46 U.S.C. ing shall be examined annually for me- chanical damage or deterioration. Any 11301 to have an official logbook, shall defect that may impair the safety of maintain the logbook on form CG–706. the pressure vessel or piping shall be (b) The person-in-charge of a vessel repaired and pressure tested to the sat- or facility not required by 46 U.S.C. isfaction of the Officer in Charge, Ma- 11301 to have an official logbook, shall rine Inspection. maintain, on board, a logbook for mak- (c) The following tests shall be con- ing the entries required by this sub- ducted at least every three years: part. (1) All piping permanently installed (c) The diving supervisor conducting on a PVHO shall be pressure tested. commercial diving operations from a

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vessel or facility subject to this sub- (ii) Time; part shall maintain a logbook for mak- (iii) Circumstances; and ing the entries required by this sub- (iv) Extent of any injury or illness. part. (c) The diving supervisor shall insure that the following is recorded in the [CGD 76–009, 43 FR 53683, Nov. 16, 1978, as amended by CGD 95–028, 62 FR 51220, Sept. 30, logbook for each diving operation devi- 1997] ating from the requirements of this subpart: § 197.482 Logbook entries. (1) A description of the cir- (a) The person-in-charge shall insure cumstances leading to the situation. that the following information is re- (2) The deviations made. corded in the logbook for each com- (3) The corrective action taken, if ap- mercial diving operation: propriate, to reduce the possibility of (1) Date, time, and location at the recurrence. start and completion of dive oper- (d) The diving supervisor shall insure ations. that a record of the following is main- (2) Approximate underwater and sur- tained: face conditions (weather, visibility, (1) The date and results of each check , and currents). of the medical kits. (3) Name of the diving supervisor. (2) The date and results of each test (4) General nature of work performed. of the air compressor. (b) The diving supervisor shall insure (3) The date and results of each check that the following information is re- of breathing mixtures. corded in the logbook for each com- (4) The date and results of each check mercial diving operation: of each breathing supply system. (1) Date, time, and location at the (5) The date, equipment cleaned, gen- start and completion of each dive oper- eral cleaning procedure, and names of ation. persons cleaning the diving equipment (2) Approximate underwater and sur- for oxygen service. face conditions (weather, visibility, (6) The date and results of each test temperatures, and currents). of the breathing supply hoses and sys- (3) Names of dive team members in- tem. cluding diving supervisor. (7) The date and results of each in- (4) General nature of work performed. spection of the breathing gas supply (5) Repetitive dive designation or system. elapsed time since last hyperbaric ex- (8) The date and results of each test posure if less than 24 hours for each of depth gages and timekeeping de- diver. vices. (6) Diving modes used. (9) The date and results of each test (7) Maximum depth and bottom time and inspection of each PVHO. for each diver. (10) The date and results of each in- (8) Name of person-in-charge. spection of the diving equipment. (9) For each dive outside the no-de- (11) The date and results of each test compression limits, deeper than 130 and inspection of pressure piping. fsw, or using mixed-gas, the breathing (12) The date and results of each test gases and decompression table designa- and inspection of volume tanks and tions used. cylinders. (10) When decompression sickness or (e) The diving supervisor shall insure gas embolism is suspected or symptoms that a notation concerning the loca- are evident— tion of the information required under (i) The name of the diver; and paragraph (d) is made in the logbook. (ii) A description and results of treat- NOTE: 46 U.S.C. 11301 requires that certain ment. entries be made in an official logbook in ad- (11) For each fatality or any diving dition to the entries required by this section; related injury or illness that results in and 46 U.S.C. 11302 prescribes the manner of incapacitation of more than 72 hours or making those entries. requires any dive team member to be [CGD 76–009, 43 FR 53683, Nov. 16, 1978, as hospitalized for more than 24 hours— amended by USCG–1999–6216, 64 FR 53229, Oct. (i) The date; 1, 1999]

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§ 197.484 Notice of casualty. to alcohol or drug involvement as re- quired by § 4.05–12 of this chapter. (a) In addition to the requirements of subpart 4.05 of this chapter and 33 CFR (The reporting requirement in paragraph (a) 146.30, the person-in-charge shall notify was approved by OMB under control number the Officer-in-Charge, Marine Inspec- 1625–0001) tion, as soon as possible after a diving [CGD 76–009, 43 FR 53683, Nov. 16, 1978, as casualty occurs, if the casualty in- amended by CGD 82–023, 47 FR 35748, Aug. 16, volves any of the following: 1982; 48 FR 43328, Sept. 23, 1983; CGD 84–099, 52 (1) Loss of life. FR 47536, Dec. 14, 1987; USCG–2006–25697, 71 (2) Diving-related injury to any per- FR 55747, Sept. 25, 2006] son causing incapacitation for more than 72 hours. § 197.488 Retention of records after casualty. (3) Diving-related injury to any per- son requiring hospitalization for more (a) The owner, agent, or person-in- than 24 hours. charge of a vessel or facility for which (b) The notice required by this sec- a report of casualty is made under tion must contain the following: § 197.484 shall retain all records onboard (1) Name and official number (if ap- that are maintained on the vessel or fa- plicable) of the vessel or facility. cility and those records required by (2) Name of the owner or agent of the this subpart for 6 months after the re- vessel or facility. port of a casualty is made or until ad- (3) Name of the person-in-charge. vised by the Officer-in-Charge, Marine Inspection, that records need not be re- (4) Name of the diving supervisor. tained onboard. (5) Description of the casualty in- (b) The records required by paragraph cluding presumed cause. (a) of this section to be retained on (6) Nature and extent of the injury to board include, but are not limited to, persons. the following: (c) The notice required by this sec- (1) All logbooks required by § 197.480. tion is not required if the written re- port required by § 197.486 is submitted (2) All reports required by within 5 days of the casualty. § 197.402(a)(2)(ii), § 197.404(a)(4), § 197.410(a)(9). [CGD 76–009, 43 FR 53683, Nov. 16, 1978, as (c) The owner, agent, person-in- amended by CGD 95–072, 60 FR 50469, Sept. 29, charge, or diving supervisor shall, upon 1995] request, make the records described in § 197.486 Written report of casualty. this section available for examination by any Coast Guard official authorized The person-in-charge of a vessel or to investigate the casualty. facility for which a notice of casualty was made under § 197.484 shall submit a report to the Officer-in-Charge, Marine Subpart C—Benzene Inspection, as soon as possible after the casualty occurs, as follows: SOURCE: CGD 88–040, 56 FR 52135, Oct. 17, (a) On Form CG–2692, when the diving 1991, unless otherwise noted. installation is on a vessel. § 197.501 Applicability. (b) Using a written report, in nar- rative form, when the diving installa- (a) Except for vessels satisfying para- tion is on a facility. The written report graph (b) of this section, this subpart must contain the information required applies to all Coast Guard inspected by § 197.484. vessels, including tank ships and (c) The report required by this sec- barges, that are carrying benzene or tion must be accompanied by a copy of benzene containing liquids in bulk as the report required by § 197.410(a)(9) . when decompression sickness is in- (b) This subpart does not apply to volved. vessels that are carrying only liquid (d) The report required by this sec- cargoes containing less than 0.5% ben- tion must include information relating zene by volume.

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