| What's the point? Most SCRs are rated shallow, I don't see an awful lot of benefit in using them over OC. They are probably more expensive on a shallow dive than OC and take a lot more hassle.
As a progression to trimix CCR? Don't bother, each rebreather has it's own set of skills, it's just something else to unlearn when you finally go CCR.
For me personally, I don't feel comfortable on active SCRs. They have no obvious failure modes to warn you of an imminent problem. At least a CCR if you are paying attention will let you know something is wrong. Other things to remember is that when converting an SCR to CCR... a. your life is totally reliant on YOUR handiwork, are you comfortable with that? And b. scrubbers that are designed for SCR use are not necessarily designed to run in CCR. In SCR you don't need the same scrubbing efficiency that a CCR requires because there is some flushing of the loop. In CCR, what is in the loop stays in the loop be traces of CO2 or traces of last night's kebab.
If money is stopping you buying a CCR now then don't waste any more buying a SCR if you do not need it.
__________________ "I hate to advocate drugs, alcohol, violence or insanity to anyone, but they've always worked for me" Hunter S Thompson http://www.snp.org |