Fact: Many people are told to open the valve fully and back off a quarter turn.
Fact: Too many people don't know how to open or close a valve (cf OP post, and the fact that there's always someone trying to close my tank).
Fact: Many people believe that if the SPG needle doesn't move when breathing, your valve is fully (or minus a quarter turn) on, therefore you'd catch any mistake.
Well, the last one is just wrong. Which means that if some moron (sometimes yourself) closed your valve and backed off a quarter turn (ie your valve is open only 1/4 turn, YES THAT IS A MISTAKE, WE KNOW, PEOPLE TRY TO DETECT THAT MISTAKE), you will not detect it by "breathing hard in your reg on the surface", and you will jump in with a closed valve if you don't check it by hand (not including vindicators).
Oh, and by the way, both Dan T and myself are fully aware that you can breathe with no problem on a fully open (even minus half a turn!) valve. But you have to understand what the mistake is that I am trying to prevent by warning against that quarter turn before trying to send your CV.
Fact: Too many people don't know how to open or close a valve (cf OP post, and the fact that there's always someone trying to close my tank).
Fact: Many people believe that if the SPG needle doesn't move when breathing, your valve is fully (or minus a quarter turn) on, therefore you'd catch any mistake.
Well, the last one is just wrong. Which means that if some moron (sometimes yourself) closed your valve and backed off a quarter turn (ie your valve is open only 1/4 turn, YES THAT IS A MISTAKE, WE KNOW, PEOPLE TRY TO DETECT THAT MISTAKE), you will not detect it by "breathing hard in your reg on the surface", and you will jump in with a closed valve if you don't check it by hand (not including vindicators).
Oh, and by the way, both Dan T and myself are fully aware that you can breathe with no problem on a fully open (even minus half a turn!) valve. But you have to understand what the mistake is that I am trying to prevent by warning against that quarter turn before trying to send your CV.
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