July 18th, 2011

Micropore ExtendAir Large Bore Rebreather Cartridge

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The demand for Micropore ExtendAir rebreather cartridges is growing and Micropore has automated production to keep up with demand. The new EAC has a larger core for the new production process. The larger core represents approximately 5% reduction in surface area and a slight increase on work of breating, however neither affect the diver. I have already tested it in the O2ptima without any change in performance. The safety margins built into the EAC more than cover the 5% reduction in surface area so no change in usage for divers, but the computers say it is ever so slightly different. Micropore is going to release all the new test data shortly and we will have it. We have a new plug available for the premix rod so you are ready to use either style of EAC.

DRT-8-PLUG, MSRP $15.00

Rebreather Diving: O2ptima Large Bore ExtendAir Cartridge

Lamar

July 11th, 2011

Revised Lift Value On All Dive Rite Wings

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There are a number of ways to test lift capacity of a scuba wing: the force applied to submerge it; the force applied to pull it under; or the weight of the water it will hold. The first two can yield different numbers depending on location of dump valve and how the force is measured. We have decided to apply the more conservative measure: the weight of the water the wing will hold. This offers the value of the water it will displace. We do our measurements with freshwater 7.5 pounds per gallon, while seawater weighs approximately 8.5 per gallon. This means a 45 pound lift wing in freshwater displaces 51 pounds in seawater. You’ll see that all Dive Rite wings lift values have been re stated on our website. The wing design nor construction has not changed, only the list value as a result of our new lift test.

Lamar