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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. Information in a log may contain the date, time and location, the profile of the dive , equipment used, air usage, above and below water conditions, including temperature, current, wind and waves, general ...
[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 ...
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.
The Halcyon RB80 is a non-depth-compensated passive addition semi-closed circuit rebreather of similar external dimensions to a standard AL80 scuba cylinder (11-litre, 207-bar aluminium cylinder, 185 mm diameter and about 660 mm long).
"He/O 2 12/88" would be a heliox blend with 12% oxygen and 88% helium. This gas would be used in commercial diving to depths up to about 100 metres (330 ft), depending on duration, but can not be used shallower than about 7 metres (23 ft) without risk of hypoxia. "Nitrox 32", or EAN 32, would be a nitrox blend with 32% oxygen and 68% nitrogen.
SSI, on the other hand, does not require a work history. Some Social Security recipients may get a surprise in November: an extra check. November Social Security payment schedule
Example: Choose a gas mixture suitable for a bounce dive to 50 metres, where P O 2 must be limited to 1.4 bar and equivalent narcotic depth to 30 metres: Pressure at 50 m depth = 6 bar Required P O 2 = 1.4 bar : Oxygen fraction F O 2 = 1.4/6 = 0.23 = 23% Required equivalent narcotic depth (END) = 30 m Equivalent air pressure at 30 m = 4 bar
In scuba diving, the rule of thirds is a rule of thumb used by divers to plan dives so they have enough breathing gas remaining in their diving cylinder at the end of the dive to be able to complete the dive safely. [1] [2] This rule generally only applies to diving in overhead environments, such as caves and wrecks, where a direct ascent to ...
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