v.i.v.a.

  1. SteveMKentucky

    Question about Scubapro V.I.V.A. system

    I recently purchased a Scubapro MK25 G260. I was surprised when I found that it had two external adjustments. The first is a typical breathing resistance adjustment (which I'm familiar with) but the second is something called a V.I.V.A. control knob. I reviewed the owner's manual which gives...
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