Nova Scotia Offshore Area Petroleum Diving Regulations
42 No diving supervisor shall conduct a category I diving operation, other than a diving operation in which SCUBA is used, unless
(a) a suitable skip is used to transport the divers involved in the diving operation to an underwater work site that is 20 m or more in depth and, where practicable, to an underwater work site that is less than 20 m in depth;
(b) an umbilical directly from the surface or via a skip is used to supply the appropriate breathing mixture to the divers involved in the dive that is part of the diving operation;
(c) the supervisor is in oral communication with any divers, stand-by divers and attendants involved in the diving operation at all times during the diving operation;
(d) the supervisor has a means of monitoring the depth of each diver involved in the diving operation and the pressure of the breathing mixture being supplied to each diver and stand-by diver involved in the dive;
(e) each diver involved in the dive is securely connected to a lifeline; and
(f) the diving crew, for the duration of the diving operation, includes one diving supervisor, one diver and a minimum of
(i) one stand-by diver equipped with an umbilical at least 3 m longer than the umbilical of the diver for whom the stand-by diver acts as stand-by,
(ii) one attendant at the dive site of the diving operation, and
(iii) as many additional attendants as the supervisor considers necessary to ensure the safety of the divers involved in the diving operation.
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