CANADIAN UNDERWATER MINE APPARATUS: UNMANNED PERFORMANCE VALIDATION OF THE SECOND PROTOTYPE SECOND STAGE REGULATOR

Authors
  1. Eaton, D.
Corporate Authors
Defence and Civil Inst of Environmental Medicine, Downsview ONT (CAN)
Abstract
The Canadian Underwater Mine Apparatus (CUMA) is a rebreather type apparatus employing a self-contained gas supply system that mixes pure oxygen with a diluent gas. The resultant gas mixture supplied to the counterlung has a constant oxygen partial pressure over the depth range of the apparatus. Operationally, the diluents used are nitrogen for depths up to 55 metres of seawater (msw) and helium to 80 msw. After the evaluation of the first prototype of the CUMA, it was recommended that the second stage regulator in diluent circuit be re-engineered to increase its compatibility with helium and saltwater before open water trials to 80 msw were attempted. The results showed a highly linear and repeatable function of the second stage regulator in relation to depth. Additionally, no gas leaks were found in the regulator. It was recommended that the new second stage regulator would be suitable for continued manned evaluations of the CUMA.
Keywords
CUMA (Canadian Underwater Mine-countermeasures Apparatus)
Report Number
DCIEM-89-TR-44 — Technical Report
Date of publication
15 Aug 1989
Number of Pages
15
DSTKIM No
90-00445
CANDIS No
62723
Format(s):
Hardcopy;Originator's fiche received by DSIS

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