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The National Association of Underwater Instructors (NAUI Worldwide) is a nonprofit association of scuba instructors founded in 1960 by Albert Tillman and Neal Hess. [2] [3]NAUI primarily serves as a recreational dive certification and membership organization, providing international diver standards and education programs.
The US Navy has used several decompression models from which their published decompression tables and authorized diving computer algorithms have been derived. The original C&R tables used a classic multiple independent parallel compartment model based on the work of J.S.Haldane in England in the early 20th century, using a critical ratio exponential ingassing and outgassing model.
The PADI Nitrox tables are laid out in what has become a common format for no-stop recreational tables Video: Setting the bezel of a diving watch to the start time (minute hand) of a dive at the beginning. Divers used this in conjunction with a depth gauge and a decompression table to calculate the remaining safe dive time (or required stops ...
Table 1A is included in the US Navy Diving Manual Revision 6 and is authorized for use as a last resort when oxygen is not available. This table has been revised by decreasing the ascent rate from 1 minute between stops to 1 fsw per minute since the original was published in 1958. [6] Use: For treatment of pain only decompression sickness. [16]
The first NAUI tables were based on reformatted but otherwise unmodified US Navy 1956 tables and issued in the early 1980s. [67] [70] The next version was a NAUI modification of the US Navy 1956 tables using the following modifications, [40] and released a few years later. No decompression limits have been reduced.
Basic decompression theory and use of decompression tables is part of the theory component of training for commercial divers, [130] and dive planning based on decompression tables, and the practice and field management of decompression is a significant part of the work of the diving supervisor.
At 27 metres depth the Bühlmann 1986 table (for altitudes of 0–700 m) allows 20 minutes bottom time without requiring a decompression stop, while at 20 metres the no-stop time is 35 minutes. This shows that using EAN36 for a 27-metre dive can give a 75% increase in no-stop bottom time over using air at the same theoretical level of risk of ...
A dive computer, personal decompression computer or decompression meter is a device used by an underwater diver to measure the elapsed time and depth during a dive and use this data to calculate and display an ascent profile which, according to the programmed decompression algorithm, will give a low risk of decompression sickness.