Recreational diving

thumb|A snorkeler amid corals on a [[coral reef near Fiji]]

man-made underwater structure

diving for the purpose of leisure and enjoyment, usually when using scuba equipment

recreational diving on submerged wrecks

thumb|A raft used for snuba showing the air cylinder and hoses Snuba is form of surface-supplied diving that uses an underwater breathing system developed by Snuba International. The origin of the word "Snuba" may be a portmanteau of "snorkel" and "scuba", as it bridges the gap between the two. Alternatively, some have identified the term as an acronym for "Surface Nexus Underwater Breathing Apparatus", though this may be a backronym for the portmanteau. The swimmer uses swimfins, a diving mask, weights, and diving regulator as in scuba diving. Instead of coming from tanks strapped to the div