13. (1) Before participating in a diving operation, a diver or standby diver shall ensure that he or she, (a)  understands the operational plan and the contingency plan for the diving operation; (b)  is aware of the hazards that could be encountered in the underwater work site; (c)  has his or her diving log book at the dive site and available for inspection by an inspector; (d)  has undergone a medical examination in accordance with section 32; (e)  has a physician’s statement, obtained in accordance with section 32, at the dive site and available for inspection by an inspector; (f)  is not fatigued; and (g)  is not impaired in his or her diving ability because of consumption of alcohol or drugs. (h)  Revoked: O. Reg. 32/14, s. 12 (1). O. Reg. 629/94, s. 13 (1); O. Reg. 32/14, s. 12 (1). (2) A diver or standby diver who is unfit to dive shall promptly inform the diving supervisor of that fact and shall refrain from diving or from acting as standby diver. O. Reg. 629/94, s. 13 (2). (3) Immediately before diving, while at the dive site, a diver or standby diver shall check that he or she has all the necessary personal diving equipment and that it is all functioning properly. O. Reg. 629/94, s. 13 (3). (4) At the onset of any sign of equipment malfunction or distress on the part of any submerged diver, a diver shall, if possible, notify the diver’s tender, the diving supervisor and any diving partner and terminate the dive. O. Reg. 629/94, s. 13 (4). (5) On completion of any dive for which this Regulation does not require decompression, a diver, other than an atmospheric diving system operator, shall remain under observation in the presence of the diving supervisor for a period set by the diving supervisor. O. Reg. 629/94, s. 13 (5). (6) On completion of any dive for which this Regulation requires decompression, a diver, other than an atmospheric diving system operator, shall remain under observation at the dive site for at least one hour. O. Reg. 629/94, s. 13 (6). (7) Where the diving supervisor is of the opinion that, because of the nature of a dive to which subsection (6) applies, a diver should remain under observation for a period longer than one hour, the diver shall remain under observation at the dive site for such longer period as the diving supervisor sets. O. Reg. 629/94, s. 13 (7). (8) A diver, other than an atmospheric diving system operator, shall not fly at an altitude greater than 1,000 feet above the dive site during, (a)  the 12-hour period following a no-decompression dive; (b)  the 24-hour period following an air dive requiring decompression; (c)  the 24-hour period following a mixed gas dive requiring decompression with a bottom time of less than two hours; (d)  the 48-hour period following a mixed gas dive requiring decompression with a bottom time of two hours or longer; (e)  the 72-hour period following a saturation dive; and (f)  any period set by an attending physician following treatment for decompression sickness. O. Reg. 629/94, s. 13 (8). (9) A standby diver shall ensure that he or she, (a)  does not dive or leave a submersible compression chamber except in the event of a health or safety emergency; (b)  does not perform any duties other than, (i)  duties of standby diver, (ii)  where he or she is also acting as diving supervisor, duties of diving supervisor, and (iii)  duties of communicating with a submerged diver; and (c)  is adequately dressed and has adequate diving and communication equipment checked, ready and at hand, having regard to the depths and circumstances in which the standby would have to operate should a rescue become necessary. O. Reg. 629/94, s. 13 (9); O. Reg. 32/14, s. 12 (2). (10) Revoked: O. Reg. 32/14, s. 12 (3). Duties of Diver’s Tenders