Canada Oil and Gas Diving Regulations — 12
12 (1) A diving contractor who conducts a diving operation shall not use or permit to be used any diving plant and equipment in the diving operation unless the design thereof is such that (a) it enables divers and pilots to safely enter and leave the water; (b) divers can be safely compressed or decompressed in accordance with the relevant schedule in the appropriate decompression table; (c) where a hot-water system is used as the means of heating a diver, a hot-water reservoir is, where practicable, included in the system; and (d) the body temperature of a diver or pilot can be maintained within safe limits during the diving operation. (2) A diving contractor who conducts a diving operation shall ensure that (a) prior to the time a diver involved in the diving operation enters the water, the diver is provided with (i) a diving harness complete with pelvic support and lifting ring, (ii) a depth indicator that is, where practicable, a type that can be monitored from the surface, and (iii) during any period of darkness or low visibility or where requested by the supervisor of the diving operation, a lamp or other suitable device that indicates the diver’s location; (b) the first-aid supplies listed in Part I of Schedule IV, or equivalent first-aid supplies approved in accordance with section 5 for the diving program of which the diving operation is a part, are (i) packed in such a manner that they fit through the medical lock of any surface compression chamber used in the diving operation, and (ii) kept on the craft or installation from which the diving operation is conducted, except where it is impracticable in a category I diving operation or an ADS diving operation and where the supervisor of the diving operation approves, in which case the supplies may be kept readily available within a travelling distance of the diving operation that is acceptable to the supervisor and, where a diving bell or diving submersible is used in the diving operation, the first-aid supplies listed in Part II of Schedule IV, or equivalent first-aid supplies approved in accordance with section 5 for the diving program of which the diving operation is a part, are kept in the diving bell or the compression chamber of the diving submersible; (c) any airtight container used to pack any of the first-aid supplies referred to in paragraph (b) for use in the diving operation has a suitable means of equalizing pressure; (d) where the safe use of the diving plant and equipment depends on the pressure or depth at which it is used, the diving plant and equipment is clearly marked with the maximum working pressure or the maximum depth at which it may be used; (e) any lifeline used in the diving operation has a manufacturer’s breaking strength rating in accordance with an acceptable standard; (f) any gas bottle used in the diving operation is clearly marked with the name and chemical formula of its contents; (g) any winch used in the diving operation to raise or lower a skip, diving bell, diving submersible or ADS (i) is so constructed that (A) a brake or mechanical locking device is applied when the control lever, handle or switch is not held in the operating position, (B) the brakes have the capability of stopping and holding 100 per cent of the maximum working load with the outermost layer of wire on the drum, (C) the brakes engage automatically on loss of power, and (D) the lowering and raising of loads is controlled by power drives independent of the brake mechanism, (ii) is not fitted with a pawl and ratchet gear on which the pawl has to be disengaged before commencing a lowering or raising operation, (iii) is so designed as to prevent the possibility of freeze-up when in operation, (iv) is equipped with a lifting wire capable of withstanding a functional test in accordance with an acceptable standard, and (v) complies with an acceptable standard of construction for winches; (h) any prime mover used in the diving operation to operate lifting equipment for a