SELECTION OF A GAS AND FLOW RATE FOR THE BAILOUT ASSEMBLY USED IN THE CANADIAN CLEARANCE DIVING APPARATUS

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Authors
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The Canadian Clearance Diving Breathing Apparatus (CCDA) is a closed/semi closed circuit oxygen/nitrogen minecountermeasures re-breather diving set. Since 1991 a Bailout assembly has been available to the CCDA and by the spring of 1993 all CCDA's held by both Fleet Diving Units had been modified to accept the bailout assembly. The objective of this investigation was to select which of the four standard oxygen/nitrogen breathing gasses used in NATO could be used with the Bailout without modifications or additional capital expense. To analyze the data a computer spreadsheet was constructed so that gas flow rates, oxygen consumption, ascent rates, depth changes and other variables could be added or changed throughout a simulated dive scenario. After looking at the four available NATO diving gasses, the simulation showed that only one of the four gasses, a mixture of 60% oxygen and 40% nitrogen, would be suitable for use as a Bailout gas for the CCDA over the full depth range of 0 to 54 metres. The gas flow rate selected was 10.5 standard litres per minute.
Report Number
DCIEM-93-37 — Technical Report
Date of publication
01 Jul 1993
Number of Pages
16
DSTKIM No
93-04554
CANDIS No
134707
Format(s):
Hardcopy;Originator's fiche received by DSIS;Document Image stored on Optical Disk

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