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"Rock bottom gas planning" refers to the methods of scuba gas quantity calculation based on a planned dive profile where a reasonably accurate estimate of the depths, times, and level of activity expected for each stage of the dive is available, so fairly rigorous calculations for gas mixtures and the appropriate quantities of each mixture are ...
The PADI recreational dive planner, in "Wheel" format. The Recreational Dive Planner (or RDP) is a decompression table in which no-stop time underwater is calculated. [1] The RDP was developed by DSAT and was the first dive table developed exclusively for no-stop recreational diving. [2]
The difference in PO 2 can be used to calculate PHe, or conversely, a desired trimix product partial pressures can be used to calculate the PO 2 for the nitrox and trimix stages of the blend. Example: Desired product 50% helium, 16% oxygen, remainder nitrogen (34%). The PO 2 after the helium addition must be 0.16 bar if there is negligible ...
The complete dive plan review uses the mnemonic SADDDD: [9] Sequence: Who leads, who follows, and the responsibilities of each member of the team. Air: Turn pressure, decompression ('deco'), bailout deco. Distance: Planned penetration of a cave/ wreck, how far from boat/ shore, etc. Depth: Planned maximum and average depths of the dive ...
SSI was founded by Robert Clark in 1970. [2] SSI headquarters was in Fort Collins, Colorado, and it is owned by Concept Systems International, Inc.In 2008, it was acquired by Doug McNeese, owner of the National Association of Scuba Diving Schools (USA) until its merger with SSI in 1999, and Robert Stoss, manager of Scubapro and Seemann Sub.
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.
A twin 12.2 litre 230 bar set carries about 6.7 kilograms (15 lb) of Nitrox when full, so the diver should start the dive about 6.7 kilograms (15 lb) negative and use about 6.7 liters (0.24 cu ft) of gas in the BCD at the start of the dive.
[1] [2] [12] [13] A maximum oxygen partial pressure of 1.4 bar for the active sectors of the dive, and 1.6 bar for decompression stops is recommended by several recreational and technical diving certification agencies for open circuit, [14] and 1.2 bar or 1.3 bar as maximum for the active sectors of a dive on closed-circuit rebreather ...