Which do you think is less dangerous at 160ft? Open-circuit air or CCR trimix?
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old frogman
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Apologies to you all. It is about cave diving. Misread the first sentence. No further comments from me.
What happened is some turned cavern into cave. The OP can correct me if im wrong but I believe he was referring to Buford Spring. The argument that air should not be used past 100 feet is just as ridiculous as arguing it should be used to 400 feet. But that’s what happens when you have people with no experience or training diving air deep condemning it because of what they read or heard somewhere. I’m talking in general not your personal opinion.
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iliketopetsharks
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Or people that need to rationalize their stinginess, knowing full well trimix would be the better choice...
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Back in the stone age, 1970's, I worked at a commercial diving school. The school was run by ex Navy divers, so a lot of the things we did were right out of Navy training.
One of the exercises, we ran every student to 190' on air, I must have put 80 or so through this. We gave them simple puzzles and math problems to solve asked them to sign their name.
About 20% had no issue with the puzzles or problems. About 20% drooled, laughed or peed themselves rolling around on the floor of the chamber. All of the rest had varying levels of difficulties solving a problem or puzzle. Some could not spell their name. And this was a 10 minute bottom time.
I did Dipolder II once on air, the only thing I vividly remember is my sealed beam light imploding and having to come out on a 3 D cell U S Divers light. The rest is fuzzy except freezing my ass off at deco. We did a lot of of air dives. Most people did not carry O2, we did a metric ass load of air decompression. 160 feet on air was just another Tuesday night after work dive.
I wouldn't do it now for a couple of reasons. First, while I wasn't paying attention, I have turned into a old man. Second. tri mix is still relatively cheap. When you are willing to plop down 15k for a rebreather, 7k for a scooter, more for dry suit, heaters, misc other junk, complaining about the occasional $200 tri mix fill sounds dumb.
One of the exercises, we ran every student to 190' on air, I must have put 80 or so through this. We gave them simple puzzles and math problems to solve asked them to sign their name.
About 20% had no issue with the puzzles or problems. About 20% drooled, laughed or peed themselves rolling around on the floor of the chamber. All of the rest had varying levels of difficulties solving a problem or puzzle. Some could not spell their name. And this was a 10 minute bottom time.
I did Dipolder II once on air, the only thing I vividly remember is my sealed beam light imploding and having to come out on a 3 D cell U S Divers light. The rest is fuzzy except freezing my ass off at deco. We did a lot of of air dives. Most people did not carry O2, we did a metric ass load of air decompression. 160 feet on air was just another Tuesday night after work dive.
I wouldn't do it now for a couple of reasons. First, while I wasn't paying attention, I have turned into a old man. Second. tri mix is still relatively cheap. When you are willing to plop down 15k for a rebreather, 7k for a scooter, more for dry suit, heaters, misc other junk, complaining about the occasional $200 tri mix fill sounds dumb.
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