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CMAS** scuba diver; CUMA; Carmellan Research; Clearance Divers Life Support Equipment; Continental Shelf Station Two; Death of Bradley Westell; Devil's Throat at Punta Sur; Dive center; Diversnight; Diving Science and Technology; Diving Unlimited International; Diving at the 1991 World Aquatics Championships – Men's 1 metre springboard ...
Example of the Scuba Diver Insignia on a USMC service uniform. The various diver insignia (also known as "diver badges", "dive badges," and colloquially known as "dive bubbles") [1] of the uniformed services of the United States are badges awarded to service personnel once they have graduated an appropriate diving course.
Diver down flag being flown on a dive ship. The use of the red and white flag, which was created in the early 1950s by Navy veteran Denzel James "Doc" Dockery of Michigan, and popularized by Ted Nixon of US Divers, [4] is required by law or regulation in many US states, Canada, [5] and some other countries (e.g. Italy). [6]
Scuba diving is a mode of underwater diving whereby divers use breathing equipment that is completely independent of a surface breathing gas supply, and therefore has a limited but variable endurance. [1] The word scuba is an acronym for "Self-Contained Underwater Breathing Apparatus" and was coined by Christian J. Lambertsen in a patent ...
Freediving as a recreational activity is widely practiced and differs significantly from scuba diving. Although there are potential risks to all freediving, it can be safely practiced using a wide range of skill levels from the average snorkeler to the professional freediver. Compared to scuba diving, freediving offers: [citation needed]
free-diving. Main article: Free-diving. Underwater diving that does not involve the use of external breathing apparatus, but relies on a diver's ability to hold their breath until resurfacing. See also breath-hold diving, and apnea (q.v.) free-flow 1. Constant flow rate air supply 2. See: Mechanism of diving regulators#Free-flow