Interspiro Divator MK II and DP2 Evaluation (Unmanned)
2007
Briere, Michael
The Interspiro DP2 and Divator MK II UBAs with the Divator positive-pressure and nonpositive-pressure full face masks (FFMs) were evaluated as possible candidate UBAs for inclusion on the Authorised for Navy Use (ANU) List. Resistive effort (RE) evaluations were conducted in 38 F fresh water and 29 F salt water. A free-flow evaluation - in which one FFM was breathed with a Reimers breathing simulator while a second FFM was allowed to free flow to determine whether it would degrade the RE of a second diver's FFM - was conducted for the DP2. With 1500 and 500 psig breathing gas supply pressures, the Divator MK II scuba met the Navy Experimental Diving Unit (NEDU) RE goal of 1.37 kPa at 62.5 L/min for Category 1 UBAs to a depth of 132 fsw with both the positive-pressure and nonpositive-pressure FFMs. With a 1500 psig breathing gas supply pressure, the DP2 met the NEDU goal of 1.76 kPa at 62.5 L/min for Category 2 UBAs to a depth of 198 fsw in 38 F water with the positive-pressure and nonpositive-pressure FFMs. At 29 F this goal was met to 198 fsw with the nonpositive-pressure FFM and to 165 fsw with the positive-pressure FFM.
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