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A consensus recommendation of the Rebreathers and Scientific Diving Workshop of February 2015 was that scientific rebreather divers should maintain currency in rebreather diving by a minimum annual activity of 12 dives with a minimum dive time of 12 hours, and that this might be insufficient for some activities.
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). It was originally developed by Reinhard Buchaly (RB) in 1996 for the cave exploration dives conducted by the ...
[11] [12] [13] In collaboration with rEvo rebreathers, they were able to show that the thermal canister CO 2 monitor would work with Shearwater's Predator dive computer. [14] Shearwater has continued to develop new ways to calculate decompression in their equipment by releasing an implementation of the Varying Permeability Model (VPM-B/GFS) in ...
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 type of gas mixture used is determined either by the maximum depth planned for the dive, or by the length of time that the diver intends to spend underwater. While the recommended maximum depth for conventional scuba diving is 130 ft, technical divers may work in the range of 170 ft to 350 ft, sometimes even deeper.
The Mk15 rebreather supplies a constant partial pressure of oxygen of 0.7 bar (70 kPa) with nitrogen as the inert gas. Prior to 1980 it was operated using schedules from printed tables. It was determined that an algorithm suitable for programming into an underwater decompression monitor (an early dive computer) would offer advantages. This ...
Tests on the IDA71 at the United States Navy Experimental Diving Unit in Panama City, Florida showed that the IDA71 could give significantly longer dive time with superoxide in one of the canisters than without. [34] This technology may be applied to both oxygen and mixed gas rebreathers, and can be used for diving and other applications.
Halcyon PVR-BASC semi-closed rebreather - underside, showing gas supply connectors, hoses and manual valves, and loop drain pump Halcyon PVR-BASC semi-closed rebreather underside, showing bolts for connection to backplate
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