Category II Dive
“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).
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