Term
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Definition
| means an emergency breathing mixture supply worn by a diver; |
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Term
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Definition
| means the total elapsed time measured in minutes, from the time a descending diver leaves the surface to the time the diver begins final ascent, rounded to the next whole minute; |
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Term
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Definition
| means a mixture of gases for human respiration and includes pure oxygen; |
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Term
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Definition
| means the procedure that a diver follows during the ascent from depth in order to minimize the risk of decompression sickness; |
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Term
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Definition
| means diving to depths greater than 165 feet; |
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Term
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Definition
| means a surface location at which diving personnel and equipment are located in support of the underwater work site; |
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Term
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Definition
(a) an atmospheric diving system operator, and
(b) a worker who performs work underwater at any pressure greater than one atmosphere,
and includes a standby diver who dives in the event of a health or safety emergency; |
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Term
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Definition
| means a person who assists a diver at the dive site by monitoring the diver’s equipment, communicating with the diver and otherwise monitoring the diver’s health and safety; |
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Term
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Definition
| means work performed underwater by divers or work performed on the surface in support of divers, and includes underwater inspection, investigation, excavation, construction, alteration, repair or maintenance of equipment, machinery, structures or ships and the salvage of sunken property; |
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Term
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Definition
| in relation to a procedure, material, device, object or any other thing, means sufficient for its intended and actual use and sufficient to protect a worker from damage to the worker’s body or health, and “adequately” has a corresponding meaning; |
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Term
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Definition
| a pressure vessel and associated equipment designed for pressures greater than one atmosphere; |
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Term
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Definition
| a safety rope used to tether a diver; |
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Term
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Definition
| means a diving operation conducted from a vessel the propeller of which is turning, whether the vessel is stationary or moving; |
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Term
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Definition
| a breathing mixture other than air; |
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Term
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Definition
| a cage, basket, platform or other device in or on which a diver may be lowered to or raised from an underwater work site but does not include a submersible compression chamber, an atmospheric diving system or a lock-out submersible; |
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Term
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Definition
| a person who stands by at the dive site prepared to rescue a submerged diver should rescue become necessary; |
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Term
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Definition
| diving where the diver is supplied with a breathing mixture through an umbilical bundle, whether or not a submersible compression chamber is used; |
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Term
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Definition
| means a composite of hoses, wires and cables designed to supply services, such as breathing mixtures, power, heat and communications, from the surface to a diver or to a submersible compression chamber; |
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Term
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Definition
| the underwater location where work is performed; |
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Term
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Definition
| includes dams, head gates, stop logs, turbine intake gates and pump intake gates; |
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