“Stand-by diver” means a diver who is dressed-in and trained to operate at the same depths and in the same circumstances as the diver for whom the stand-by diver is standing by, who is at the same dive site as the other diver and who is available without delay to assist that other diver (plongeur de secours).
Source: Canada Oil and Gas Diving Regulations, SOR/88-600, February 2013. Regulations
Source: Nova Scotia Offshore Area Petroleum Diving Regulations, SOR/95-189, Canada, current to May 31, 2012. Regulations