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Home , Diving supervisor

Coast Guard, DOT § 197.436

(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 ; and than 220 fsw or when the dive involves (f) A boat is available for diver pick- in-water 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- 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 gas supply; (g) When 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 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 . 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 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 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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