detroit diver
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jonnythan:Why would a semi-closed need an OPV?
Mine became semi-closed AFTER removing the OPV. It was a closed bag before that.
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jonnythan:Why would a semi-closed need an OPV?
detroit diver:I use a 6 ft Halcyon SMB, with the OPV valve removed. The valve is at the bottom of the SMB when inflated. My adjustment makes this a semi-closed SMB, and allows you to fill it either by the regulator, by mouth, or by an inflator hose.
overexposed2X:Do you have a photo of this?
jagfish:I'm about the same as Lamont...Large and small Halcyon SMB.
I carry the small SMB hooked up to a 75 fool spool in my left pocket on all dives. Really easy to inflate with the one way valve. Just a few puffs from you mouth does it. You don't really have to mess with an inflator hose...
lamont:Yeah, I bought the medium 4' one first -- but the small 3' is actually much smaller and much more appropriate for shore diving around here. If I was diving in currents off of a boat I'd probably take the medium one. The large one I think I'd only use when there was going to be little chance of making it to shore or getting picked up by another ship or rescuers in the time it would take to become hypothermic.
I wish that halcyon would make them in yellow though. I'd like to carry an orange one for 'everything is cool, just couldn't find the upline' and yellow for 'oh ****, send gas down'.
detroit diver:Not at my office, but I'll shoot one tonite and post it.