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A dive log is a record of the diving history of an underwater diver. The log may either be in a book, locally hosted software , or web based. The log serves purposes both related to safety and personal records.
Personal dive computer display of dive profile and log data A dive profile is a description of a diver's pressure exposure over time. It may be as simple as just a depth and time pair, as in: "sixty for twenty," (a bottom time of 20 minutes at a depth of 60 feet) or as complex as a second by second graphical representation of depth and time ...
Recreational scuba diver The undersea kelp forest of Anacapa Island off of the coast of Oxnard, California Diver looking at a shipwreck in the Caribbean Sea. 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]
Many of the terms are in general use by English speaking divers from many parts of the world, both amateur and professional, and using any of the modes of diving. Others are more specialised, variable by location, mode, or professional environment.
safety equipment including a dive computer or timer and dive tables, a cutting device, a surface marker buoy, and a sound signal for the surface, fitness to dive according to the RSTC questionnaire. with the exception of the support vessel, all vessels must remain at least 50 metres from the diving area,
Exley was the first in the world to log over 1,000 cave dives (at the age of 23); in 29 years of cave diving, he made over 4000 dives. [10]Exley had an unusual resistance to nitrogen narcosis, and was one of the few divers to survive a 400-foot (120 m) open-water dive on simple compressed air.
In skydiving, a logbook serves as a parachutist's personal history in the sport and also serves as an identifying document. It also provides drop zones proof to back one's skydiving licenses, ratings and currency. [citation needed] In scuba diving, the dive log documents the experience of a diver by logging a diver's dives.
Blowdown silencer for emptying scuba cylinders Before internal inspection the valve must be removed after depressurising and verifying that the valve is open. Cylinders containing breathing gases do not need special precautions for discharge except that high oxygen fraction gases should not be released in an enclosed space because of the fire ...
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