Did you notice he is in Mexico?Quote:
Originally Posted by Jax
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Did you notice he is in Mexico?Quote:
Originally Posted by Jax
There was a car running in front of the air intake of the compressor. The gas blender relied on the CO filter, which unfortunately has a very limited capacity. Some of us got a 21/35/10ppm quadmix. Noticed it by chance mere minutes prior to the dive because one of us happened to carry a CO analyzer. No experience with CO under water.
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Oh, wow . . . just wow . . .Quote:
Originally Posted by FW
I have had experiences with CO both in the water and out. In 2011 I helped swim my friend's body out of a cave in Mexico. We found out that his passing out was the result of CO poisoning from the person who preformed the autopsy. This individual insisted on this diagnosis despite pressure from local authorities to change it to drowning. I have posted about this event for the team on this forum. My friend's passing helped bring the danger of CO contamination into the light. Since that day I have not dove any tank with out analyzing it for O2, He and CO. I do this not to look for CO but simply to make sure what I am breathing is in fact what I think I should be breathing. Two years ago I analyzed my tanks and found that they had Co readings of 17ppm to 43ppm depending on the tank. The odd thing was I had trouble believing these readings because I had filled the tanks myself at a dive shop who works very hard maintaining his compressors. I then analyzed the tanks again with another analyzer and got the same results. Then I used those button detectors still I had doubt so I barrowed Forrest's and got the same results. I called the shop owner and he acted very honestly by calling all his customers from the past week and warning them to either test or dump their tanks. Even after the first experience with CO my mind had trouble believing I could be hit again in less the 300 dives. I have talked to several groups about that day in Mexico (I will speak to any group that asked me) and have done much research into how these event happen. It is my belief, and mine alone, that these events don't happen because they are bad shops operating dangerously, but rather, these events happen to GOOD shops who have had something bad happen to them. The answer to how to stop these event for shops is absolute vigilance in maintenance and in keeping divers analyzing and logging the contains of their tanks. Divers need to have absolute vigilance in analyzing their tanks each dive every dive. In the end, it's up to the individual to protect himself.
Well said, MichaelAngelo!
Yes.Quote:
Originally Posted by Jax
I didn't know Brendan, but I knew about half a dozen on that trip. It was right before DEMA 2011 in Orlando, and every cave diver I saw at DEMA bought a CO detector. I check mine EVERY dive.
Quote:
Originally Posted by FW
Yes I live in Mexico Forrest, but positive readings have come from many different countries visited, and as I said Co in o2 is pretty much a global thing (all the o2 I've analysed in the Pacific is shipped from the US of A)...
The only O2 I have seen CO in was in welding tanks. Never in aviation, or medical tanks. Most gas suppliers just refill welding tanks, which may get CO in them from getting empty while welding. They clean aviation, and medical tanks.Quote:
Originally Posted by Kelvin Davidson
Has no bearing. Medical oxygen is allowed to have some co. I can't remember the exact amount. But it's not uncommon worldwide.Quote:
Originally Posted by FW
I've never been huge on marking my primary tanks for storage or transport, which sometimes draws a negative comment, but it keeps me honest with myself about analyzing every time. I often analyze after a fill, and then absolutely every time I put my regs on the tanks before getting in the water. It does mean the same tank gets analyzed a couple times on the same fill, but who cares - I'm slow enough gearing up, no one is going to notice another two minutes.