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A magnesium torch is a bright light source made from magnesium, which can burn underwater and in all weather conditions. They are used for emergency illumination for railroad applications. They were also used in the 1950s up to the early 1970s as a light source for scuba diving, and were featured occasionally in television shows. A relay of ...
Underwater video is an scuba-based underwater sport governed by CMAS where teams of competitors using digital underwater video systems all dive at the same saltwater ocean sites at the same time over a two-day period. The submitted digital video are then assessed and ranked by a jury. [22] [23]
The NOAA Diving Manual: Diving for Science and Technology is a book originally published by the US Department of Commerce for use as training and operational guidance for National Oceanographic and Atmospheric Administration divers. NOAA also publish a Diving Standards and Safety Manual (NDSSM), which describes the minimum safety standards for ...
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 ...
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In 1976 the JIM suit was used for a series of four dives on PanArtic's Hecla M25 well which were made through a hole cut in an ice floe 16 feet (4.9 m) thick, on which the rig was positioned, the first dive setting a record for the longest working dive below 490 feet (150 m), five hours and 59 minutes at a depth of 905 feet (276 m).
A backup light can be useful if the primary light fails, [9] and is essential if doing a decompression dive without a dive computer which can be read in the dark. There are several advantages to night diving at a site that is familiar from diving there during the day. The diver who is more familiar with the site is less likely to be disoriented ...
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