from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun The set of equipment required by a
scuba diverto be at ease when submerged for extended periods of time. Modern equipment sets include tanks containing mixes of nitrogenin varied ratios with oxygen(the most common ratios are 21%, 32% and 36% oxygen), a buoyancy control device, a first- and second-stage regulator (to allow the regulated flow of gas from the tank into the user's respiratory system), a wetsuitand accessories for heat insulation, finsfor underwater propulsion, as well as a mask(to be able to see underwater) and a snorkel(for moving around the surface of the water without using up breathing gas). Many divers also choose to dive with a diving knife (in case of a tangle with a net, etc.), and night divers may also dive with a waterproofflashlight.
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