Canada Oil and Gas Diving Regulations — 2
2 In these Regulations, acceptable standard means an applicable standard that is acceptable to the Minister; ( norme acceptable ) accident means a fortuitous event that results in the death of or injury to any person involved in a diving operation; ( accident ) Act means the Oil and Gas Production and Conservation Act ; ( Loi ) ADS means an atmospheric diving system capable of withstanding external pressures greater than atmospheric pressure and in which the internal pressure remains at atmospheric pressure and includes a one-person submarine and the one-atmosphere compartment of a diving submersible; ( système ADS ) ADS dive means a dive in which an ADS is used; ( plongée avec système ADS ) ADS diving operation means a diving operation in which an ADS dive is made; ( opérations de plongée avec système ADS ) ADS supervisor means a supervisor of a diving operation involving a pilot; ( (directeur de plongée avec système ADS) ) ambient pressure means the pressure at any given depth; ( pression ambiante ) appropriate breathing mixture means, in relation to a diving operation, a breathing mixture that is suitable, in terms of composition, temperature and pressure, for the diving plant and equipment used in the diving operation, for the work to be undertaken and for the conditions under which and the depth at which the diving operation is to be conducted; ( mélange respiratoire approprié ) attendant means a person who has been trained in diving procedures and who is acting under the direction of a supervisor; ( adjoint ) bell bounce diving technique means a diving procedure whereby a diving bell or diving submersible is used to transport divers who are under atmospheric pressure or pressures greater than atmospheric pressure to a work site and subsequently to transport the divers under pressures greater than atmospheric pressure from an underwater work site, but does not include saturation diving techniques; ( technique de la plongée d’incursion ) bottom time means the period commencing when a person begins pressurization or descent for a dive and terminating when the person commences decompression or ascent; ( durée du séjour au fond ) breathing mixture means a mixture of gases used for human respiration and includes pure oxygen and any therapeutic mixture; ( mélange respiratoire ) category I dive means a dive to a depth of less than 50 m using surface-oriented diving techniques and a breathing mixture of air, but no other breathing mixture except in cases of decompression, treatment or emergency, and includes a dive in which a diving bell or diving submersible is used for an observation dive, but does not include a lock-out dive; ( plongée de catégorie I ) category I diving operation means a diving operation in which a category I dive is made; ( opérations de plongée de catégorie I ) category II dive means a dive in which a diving bell or diving submersible is used for a lock-out dive to a depth of less than 50 m using a breathing mixture of air, or to a depth of 50 m or more using a breathing mixture of mixed gas other than air, but does not include a saturation dive; ( plongée de catégorie II ) category II diving operation means a diving operation in which a category II dive is made; ( opérations de plongée de catégorie II ) category III dive means a saturation dive and any dive other than an ADS dive, a category I dive or a category II dive; ( plongée de catégorie III ) category III diving operation means a diving operation in which a category III dive is made; ( opérations de plongée de catégorie III ) compression chamber means a pressure vessel that is suitable for human occupancy at internal pressures greater than atmospheric pressure; ( caisson de compression ou compartiment de compression ) contingency plan means a contingency plan referred to in paragraph 4(4)(i); ( plan d’urgence ) craft means any vessel, vehicle, hovercraft, semi-submersible, submarine or diving-submersible and includes a self-propelled, tethered, towed